Use more Java 8 idioms in wicket-examples

Project: http://git-wip-us.apache.org/repos/asf/wicket/repo
Commit: http://git-wip-us.apache.org/repos/asf/wicket/commit/5ec3ecb5
Tree: http://git-wip-us.apache.org/repos/asf/wicket/tree/5ec3ecb5
Diff: http://git-wip-us.apache.org/repos/asf/wicket/diff/5ec3ecb5

Branch: refs/heads/master
Commit: 5ec3ecb5c14edbd3ebe7b383441547bf71892bc1
Parents: 56325c6
Author: Martin Tzvetanov Grigorov <[email protected]>
Authored: Wed Jun 15 23:19:11 2016 +0200
Committer: Martin Tzvetanov Grigorov <[email protected]>
Committed: Wed Jun 15 23:19:11 2016 +0200

----------------------------------------------------------------------
 .../org/apache/wicket/behavior/Behavior.java    |  2 +-
 .../wicket/markup/html/include/Include.java     |  5 +-
 .../bean/validation/BeanValidationPage.java     | 14 ++--
 .../breadcrumb/BreadCrumbApplication.java       |  6 --
 .../wicket/examples/breadcrumb/FirstPanel.java  |  3 -
 .../wicket/examples/breadcrumb/FourthPanel.java |  3 -
 .../wicket/examples/breadcrumb/ResultPanel.java |  6 +-
 .../wicket/examples/breadcrumb/SecondPanel.java | 10 +--
 .../wicket/examples/breadcrumb/ThirdPanel.java  |  3 -
 .../examples/captcha/AbstractCaptchaForm.java   | 20 ++----
 .../wicket/examples/captcha/CageForm.java       |  2 +-
 .../examples/captcha/CaptchaApplication.java    | 10 ---
 .../wicket/examples/captcha/CaptchaForm.java    |  2 +-
 .../wicket/examples/captcha/KaptchaForm.java    |  2 +-
 .../examples/cdi/AutoConversationPage1.java     | 18 +----
 .../wicket/examples/cdi/ConversationPage1.java  | 20 +-----
 .../wicket/examples/cdi/ConversationPage2.java  |  9 +--
 .../wicket/examples/cdi/InjectionPage.java      |  9 +--
 .../examples/compref/BookmarkablePage.java      | 37 ++---------
 .../wicket/examples/compref/ButtonPage.java     |  2 +-
 .../compref/CheckBoxMultipleChoicePage.java     |  6 +-
 .../examples/compref/CheckBoxSelectorPage.java  |  2 +-
 .../wicket/examples/compref/CheckGroupPage.java |  5 +-
 .../examples/compref/CheckGroupPage2.java       |  9 +--
 .../compref/ComponentReferenceApplication.java  | 13 ----
 .../apache/wicket/examples/compref/Count.java   |  3 -
 .../examples/compref/DropDownChoicePage.java    |  7 +-
 .../wicket/examples/compref/FormPage.java       |  4 +-
 .../wicket/examples/compref/LabelPage.java      | 17 ++---
 .../wicket/examples/compref/LinkPage.java       | 70 +++-----------------
 .../wicket/examples/compref/ListChoicePage.java |  7 +-
 .../compref/ListMultipleChoicePage.java         | 22 ++----
 .../examples/compref/NonBookmarkablePage.java   | 30 ++-------
 .../wicket/examples/compref/PalettePage.java    |  2 +-
 .../examples/compref/RadioChoicePage.java       |  4 +-
 .../wicket/examples/compref/RadioGroupPage.java | 13 ++--
 .../examples/compref/RadioGroupPage2.java       | 14 ++--
 .../wicket/examples/compref/RecursivePanel.java |  5 +-
 .../wicket/examples/compref/SelectPage.java     |  4 +-
 .../examples/compref/TabbedPanelPage.java       | 12 +---
 .../wicket/examples/compref/TextAreaPage.java   |  7 +-
 .../wicket/examples/compref/TextFieldPage.java  |  9 +--
 .../apache/wicket/examples/compref/XmlPage.java |  3 -
 .../markup/html/tabs/AbstractTab.java           | 11 +--
 44 files changed, 104 insertions(+), 358 deletions(-)
----------------------------------------------------------------------


http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-core/src/main/java/org/apache/wicket/behavior/Behavior.java
----------------------------------------------------------------------
diff --git a/wicket-core/src/main/java/org/apache/wicket/behavior/Behavior.java 
b/wicket-core/src/main/java/org/apache/wicket/behavior/Behavior.java
index 74a713e..eae8cad 100644
--- a/wicket-core/src/main/java/org/apache/wicket/behavior/Behavior.java
+++ b/wicket-core/src/main/java/org/apache/wicket/behavior/Behavior.java
@@ -41,7 +41,7 @@ import org.apache.wicket.util.lang.Args;
  * You also cannot modify a components model with a behavior.
  * </p>
  * 
- * @see org.apache.wicket.behavior.IBehaviorListener
+ * @see IRequestListener
  * @see org.apache.wicket.markup.html.IHeaderContributor
  * @see org.apache.wicket.behavior.AbstractAjaxBehavior
  * @see org.apache.wicket.AttributeModifier

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-core/src/main/java/org/apache/wicket/markup/html/include/Include.java
----------------------------------------------------------------------
diff --git 
a/wicket-core/src/main/java/org/apache/wicket/markup/html/include/Include.java 
b/wicket-core/src/main/java/org/apache/wicket/markup/html/include/Include.java
index bfc52d9..0076e18 100644
--- 
a/wicket-core/src/main/java/org/apache/wicket/markup/html/include/Include.java
+++ 
b/wicket-core/src/main/java/org/apache/wicket/markup/html/include/Include.java
@@ -22,6 +22,7 @@ import java.nio.charset.Charset;
 
 import javax.servlet.ServletContext;
 
+import org.apache.wicket.IGenericComponent;
 import org.apache.wicket.WicketRuntimeException;
 import org.apache.wicket.core.util.resource.UrlResourceStream;
 import org.apache.wicket.markup.ComponentTag;
@@ -79,7 +80,7 @@ import org.apache.wicket.util.lang.Args;
  * 
  * @author Eelco Hillenius
  */
-public class Include extends WebComponent
+public class Include extends WebComponent implements IGenericComponent<String, 
Include>
 {
        private static final long serialVersionUID = 1L;
 
@@ -129,7 +130,7 @@ public class Include extends WebComponent
        {
                // gets the model object: should provide us with either an 
absolute or a
                // relative url
-               String url = getDefaultModelObjectAsString();
+               String url = getModelObject();
 
                if (UrlUtils.isRelative(url))
                {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/bean/validation/BeanValidationPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/bean/validation/BeanValidationPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/bean/validation/BeanValidationPage.java
index 33e3a04..faec290 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/bean/validation/BeanValidationPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/bean/validation/BeanValidationPage.java
@@ -16,8 +16,6 @@
  */
 package org.apache.wicket.examples.bean.validation;
 
-import java.util.Date;
-
 import org.apache.wicket.bean.validation.PropertyValidator;
 import org.apache.wicket.datetime.StyleDateConverter;
 import org.apache.wicket.datetime.markup.html.form.DateTextField;
@@ -49,13 +47,13 @@ public class BeanValidationPage extends WicketExamplePage
                
                add(form);
 
-               form.add(new TextField<String>("name", new 
PropertyModel<String>(this, "person.name")).add(new PropertyValidator<>()));
-               form.add(new TextField<String>("phone", new 
PropertyModel<String>(this, "person.phone")).add(new PropertyValidator<>()));
-               form.add(new TextField<String>("email", new 
PropertyModel<String>(this, "person.email")).add(new PropertyValidator<>()));
-               form.add(new DateTextField("birthdate", new 
PropertyModel<Date>(this, "person.birthdate"),
+               form.add(new TextField<>("name", new 
PropertyModel<String>(this, "person.name")).add(new PropertyValidator<>()));
+               form.add(new TextField<>("phone", new 
PropertyModel<String>(this, "person.phone")).add(new PropertyValidator<>()));
+               form.add(new TextField<>("email", new 
PropertyModel<String>(this, "person.email")).add(new PropertyValidator<>()));
+               form.add(new DateTextField("birthdate", new 
PropertyModel<>(this, "person.birthdate"),
                        new StyleDateConverter("S-", true)).add(new 
PropertyValidator<>()));
-               form.add(new TextField<String>("password", new 
PropertyModel<String>(this, "person.password")).add(new PropertyValidator<>()));
+               form.add(new TextField<>("password", new 
PropertyModel<String>(this, "person.password")).add(new PropertyValidator<>()));
                
                add(new FeedbackPanel("feedbackSuccess", new 
ExactLevelFeedbackMessageFilter(FeedbackMessage.INFO)));
        }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/BreadCrumbApplication.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/BreadCrumbApplication.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/BreadCrumbApplication.java
index 03c40fe..bbd7dd3 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/BreadCrumbApplication.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/BreadCrumbApplication.java
@@ -26,18 +26,12 @@ import org.apache.wicket.protocol.http.WebApplication;
  */
 public class BreadCrumbApplication extends WebApplication
 {
-       /**
-        * @see org.apache.wicket.Application#getHomePage()
-        */
        @Override
        public Class<? extends Page> getHomePage()
        {
                return Index.class;
        }
 
-       /**
-        * @see org.apache.wicket.protocol.http.WebApplication#init()
-        */
        @Override
        protected void init()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FirstPanel.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FirstPanel.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FirstPanel.java
index f4156f6..c3de650 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FirstPanel.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FirstPanel.java
@@ -41,9 +41,6 @@ public class FirstPanel extends BreadCrumbPanel
                add(new BreadCrumbPanelLink("linkToSecond", this, 
SecondPanel.class));
        }
 
-       /**
-        * @see 
org.apache.wicket.extensions.breadcrumb.IBreadCrumbParticipant#getTitle()
-        */
        @Override
        public IModel<String> getTitle()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FourthPanel.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FourthPanel.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FourthPanel.java
index f0efe1e..e299ce7 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FourthPanel.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/FourthPanel.java
@@ -39,9 +39,6 @@ public class FourthPanel extends BreadCrumbPanel
                super(id, breadCrumbModel);
        }
 
-       /**
-        * @see 
org.apache.wicket.extensions.breadcrumb.IBreadCrumbParticipant#getTitle()
-        */
        @Override
        public IModel<String> getTitle()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ResultPanel.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ResultPanel.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ResultPanel.java
index a7c8d54..7332faa 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ResultPanel.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ResultPanel.java
@@ -21,6 +21,7 @@ import 
org.apache.wicket.extensions.breadcrumb.panel.BreadCrumbPanel;
 import org.apache.wicket.markup.html.basic.Label;
 import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.Model;
+import org.apache.wicket.util.string.Strings;
 
 
 /**
@@ -42,7 +43,7 @@ public class ResultPanel extends BreadCrumbPanel
        {
                super(id, breadCrumbModel);
 
-               if (result == null || "".equals(result.trim()))
+               if (Strings.isEmpty(result))
                {
                        result = "(hey, you didn't even provide some input!)";
                }
@@ -50,9 +51,6 @@ public class ResultPanel extends BreadCrumbPanel
                add(new Label("result", result));
        }
 
-       /**
-        * @see 
org.apache.wicket.extensions.breadcrumb.IBreadCrumbParticipant#getTitle()
-        */
        @Override
        public IModel<String> getTitle()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/SecondPanel.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/SecondPanel.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/SecondPanel.java
index 4b20b28..dc296a2 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/SecondPanel.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/SecondPanel.java
@@ -59,15 +59,7 @@ public class SecondPanel extends BreadCrumbPanel
                                @Override
                                public void onSubmit()
                                {
-                                       activate(new IBreadCrumbPanelFactory()
-                                       {
-                                               @Override
-                                               public BreadCrumbPanel 
create(String componentId,
-                                                       IBreadCrumbModel 
breadCrumbModel)
-                                               {
-                                                       return new 
ResultPanel(componentId, breadCrumbModel, input);
-                                               }
-                                       });
+                                       activate((componentId, breadCrumbModel) 
-> new ResultPanel(componentId, breadCrumbModel, input));
                                }
                        });
                }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ThirdPanel.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ThirdPanel.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ThirdPanel.java
index c6797a8..05d812e 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ThirdPanel.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/breadcrumb/ThirdPanel.java
@@ -39,9 +39,6 @@ public class ThirdPanel extends BreadCrumbPanel
                super(id, breadCrumbModel);
        }
 
-       /**
-        * @see 
org.apache.wicket.extensions.breadcrumb.IBreadCrumbParticipant#getTitle()
-        */
        @Override
        public IModel<String> getTitle()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/AbstractCaptchaForm.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/AbstractCaptchaForm.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/AbstractCaptchaForm.java
index 6f85c30..3c7b14d 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/AbstractCaptchaForm.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/AbstractCaptchaForm.java
@@ -16,7 +16,6 @@
  */
 package org.apache.wicket.examples.captcha;
 
-import org.apache.wicket.ajax.AjaxRequestTarget;
 import org.apache.wicket.ajax.markup.html.AjaxLink;
 import org.apache.wicket.extensions.markup.html.captcha.CaptchaImageResource;
 import org.apache.wicket.feedback.ContainerFeedbackMessageFilter;
@@ -79,24 +78,19 @@ public abstract class AbstractCaptchaForm<T> extends 
GenericPanel<T>
                                new 
ContainerFeedbackMessageFilter(AbstractCaptchaForm.this));
                form.add(feedback);
 
-               captchaImageResource = createCaptchImageResource();
+               captchaImageResource = createCaptchaImageResource();
                final Image captchaImage = new Image("image", 
captchaImageResource);
                captchaImage.setOutputMarkupId(true);
                form.add(captchaImage);
 
-               AjaxLink<Void> changeCaptchaLink = new 
AjaxLink<Void>("changeLink")
-               {
-                       @Override
-                       public void onClick(AjaxRequestTarget target)
-                       {
-                               captchaImageResource.invalidate();
-                               target.add(captchaImage);
-                       }
-               };
+               AjaxLink<Void> changeCaptchaLink = 
AjaxLink.onClick("changeLink", target -> {
+                       captchaImageResource.invalidate();
+                       target.add(captchaImage);
+               });
                form.add(changeCaptchaLink);
 
                form.add(new RequiredTextField<String>("text",
-                               new 
PropertyModel<String>(AbstractCaptchaForm.this, "captchaText"), String.class)
+                               new PropertyModel<>(AbstractCaptchaForm.this, 
"captchaText"), String.class)
                {
                        @Override
                        protected final void onComponentTag(final ComponentTag 
tag)
@@ -108,5 +102,5 @@ public abstract class AbstractCaptchaForm<T> extends 
GenericPanel<T>
                });
        }
 
-       protected abstract CaptchaImageResource createCaptchImageResource();
+       protected abstract CaptchaImageResource createCaptchaImageResource();
 }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CageForm.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CageForm.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CageForm.java
index 7517326..0f6977d 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CageForm.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CageForm.java
@@ -41,7 +41,7 @@ public class CageForm<T> extends AbstractCaptchaForm<T>
        }
 
        @Override
-       protected CaptchaImageResource createCaptchImageResource()
+       protected CaptchaImageResource createCaptchaImageResource()
        {
                return new CaptchaImageResource()
                {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaApplication.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaApplication.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaApplication.java
index 717c05b..185c357 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaApplication.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaApplication.java
@@ -26,16 +26,6 @@ import org.apache.wicket.examples.WicketExampleApplication;
  */
 public class CaptchaApplication extends WicketExampleApplication
 {
-       /**
-        * Constructor.
-        */
-       public CaptchaApplication()
-       {
-       }
-
-       /**
-        * @see org.apache.wicket.Application#getHomePage()
-        */
        @Override
        public Class< ? extends Page> getHomePage()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaForm.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaForm.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaForm.java
index 6fe4c1e..3781c9a 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaForm.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/CaptchaForm.java
@@ -37,7 +37,7 @@ public class CaptchaForm<T> extends AbstractCaptchaForm<T>
        }
 
        @Override
-       protected CaptchaImageResource createCaptchImageResource()
+       protected CaptchaImageResource createCaptchaImageResource()
        {
                return new CaptchaImageResource()
                {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/KaptchaForm.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/KaptchaForm.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/KaptchaForm.java
index a3ffa3a..77492e8 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/KaptchaForm.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/captcha/KaptchaForm.java
@@ -44,7 +44,7 @@ public class KaptchaForm<T> extends AbstractCaptchaForm<T>
        }
 
        @Override
-       protected CaptchaImageResource createCaptchImageResource()
+       protected CaptchaImageResource createCaptchaImageResource()
        {
                return new CaptchaImageResource()
                {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/AutoConversationPage1.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/AutoConversationPage1.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/AutoConversationPage1.java
index fd5190d..65c7481 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/AutoConversationPage1.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/AutoConversationPage1.java
@@ -36,22 +36,8 @@ public class AutoConversationPage1 extends CdiExamplePage 
implements Conversatio
        {
                add(new Label("count", new PropertyModel(this, 
"counter.count")));
 
-               add(new Link<Void>("increment")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               counter.increment();
-                       }
-               });
+               add(Link.onClick("increment", () -> counter.increment()));
 
-               add(new Link<Void>("next")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               setResponsePage(new AutoConversationPage2());
-                       }
-               });
+               add(Link.onClick("next", () -> setResponsePage(new 
AutoConversationPage2())));
        }
 }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage1.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage1.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage1.java
index 157e277..78e018a 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage1.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage1.java
@@ -38,22 +38,8 @@ public class ConversationPage1 extends CdiExamplePage
 
                add(new Label("count", new PropertyModel(this, 
"counter.count")));
 
-               add(new Link<Void>("increment")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               counter.increment();
-                       }
-               });
-
-               add(new Link<Void>("next")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               setResponsePage(new ConversationPage2());
-                       }
-               });
+               add(Link.onClick("increment", () -> counter.increment()));
+
+               add(Link.onClick("next", () -> setResponsePage(new 
ConversationPage2())));
        }
 }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage2.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage2.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage2.java
index 89b9e6a..da53aca 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage2.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/ConversationPage2.java
@@ -32,14 +32,7 @@ public class ConversationPage2 extends CdiExamplePage
        {
                add(new Label("count", new PropertyModel(this, 
"counter.count")));
 
-               add(new Link<Void>("increment")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               counter.increment();
-                       }
-               });
+               add(Link.onClick("increment", () -> counter.increment()));
 
                add(new BookmarkablePageLink<Void>("next", 
ConversationPage3.class));
        }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/InjectionPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/InjectionPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/InjectionPage.java
index f6c8a95..e25450f 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/InjectionPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/cdi/InjectionPage.java
@@ -31,13 +31,6 @@ public class InjectionPage extends CdiExamplePage
        {
                add(new Label("count", new PropertyModel(this, 
"counter.count")));
 
-               add(new Link<Void>("increment")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               counter.increment();
-                       }
-               });
+               add(Link.onClick("increment", () -> counter.increment()));
        }
 }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/BookmarkablePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/BookmarkablePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/BookmarkablePage.java
index 8133b41..ad18f19 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/BookmarkablePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/BookmarkablePage.java
@@ -30,53 +30,24 @@ import 
org.apache.wicket.request.mapper.parameter.PageParameters;
 public class BookmarkablePage extends WebPage
 {
        /**
-        * Constructor.
-        */
-       public BookmarkablePage()
-       {
-               this(null);
-               // note: its here for style actually. When you have both a 
default
-               // constructor,
-               // and a constructor with a PageParameters argument, the latter 
is
-               // allways called
-               // with a non-null argument
-       }
-
-       /**
         * Construct.
         * 
         * @param pageParameters
         */
        public BookmarkablePage(PageParameters pageParameters)
        {
+               super(pageParameters);
                // get the message from the passed 'message' parameter or fall 
back to
                // the default
                // when no parameters were passed.
 
-               String message;
-               // note: the null check is here as a matter of defensive 
programming.
-               // Actually, as this
-               // constructor is allways called instead of the default 
constructor, and
-               // pageParameters
-               // never null, the check is not nescesarry. On the other 
hand... would
-               // you ever trust
-               // any API enough to just not check it at all?
-               if (pageParameters == null ||
-                       pageParameters.get("message").toOptionalString() == 
null)
-               {
-                       message = "This is the default message";
-               }
-               else
-               {
-                       message = 
pageParameters.get("message").toOptionalString();
-               }
-
+               String message = pageParameters.get("message").toString("This 
is the default message");
                // Add a label to display the message
                add(new Label("messageLabel", message));
 
                // Add a link back. We did not hold any important instance data 
in
-               // BookMarkabelPageLinkPage,
+               // BookmarkablePageLinkPage,
                // so navigating to a new instance is just fine
                add(new BookmarkablePageLink<>("navigateBackLink", 
BookmarkablePageLinkPage.class));
        }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ButtonPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ButtonPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ButtonPage.java
index 75f9d02..d18fc04 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ButtonPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ButtonPage.java
@@ -39,7 +39,7 @@ public class ButtonPage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSumbit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxMultipleChoicePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxMultipleChoicePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxMultipleChoicePage.java
index 1b20884..cd20bdd 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxMultipleChoicePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxMultipleChoicePage.java
@@ -57,7 +57,7 @@ public class CheckBoxMultipleChoicePage extends 
WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSubmit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -69,11 +69,11 @@ public class CheckBoxMultipleChoicePage extends 
WicketExamplePage
 
                // add a couple of checkbox multiple choice components, notice 
the model
                // used is a compound model set on the page
-               CheckBoxMultipleChoice<String> siteChoice = new 
CheckBoxMultipleChoice<String>("sites",
+               CheckBoxMultipleChoice<String> siteChoice = new 
CheckBoxMultipleChoice<>("sites",
                        SITES);
                form.add(siteChoice);
 
-               CheckBoxMultipleChoice<String> manyChoice = new 
CheckBoxMultipleChoice<String>("choices",
+               CheckBoxMultipleChoice<String> manyChoice = new 
CheckBoxMultipleChoice<>("choices",
                        MANY_CHOICES);
                form.add(manyChoice);
        }

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxSelectorPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxSelectorPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxSelectorPage.java
index 3163a5a..6e93db8 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxSelectorPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckBoxSelectorPage.java
@@ -85,7 +85,7 @@ public class CheckBoxSelectorPage extends WicketExamplePage
                        }
                });
                final CheckBoxMultipleChoice<Integer> choice = new 
CheckBoxMultipleChoice<>(
-                       "choice", Model.ofList(new ArrayList<Integer>()), 
Arrays.asList(1, 2, 3, 4));
+                       "choice", Model.ofList(new ArrayList<>()), 
Arrays.asList(1, 2, 3, 4));
                form.add(choice);
                form.add(new CheckboxMultipleChoiceSelector("choiceSelector", 
choice));
                final CheckBox loose1 = new CheckBox("looseCheck1", 
Model.of(Boolean.FALSE));

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage.java
index 7da2851..738920e 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage.java
@@ -43,7 +43,7 @@ public class CheckGroupPage extends WicketExamplePage
        public CheckGroupPage()
        {
                final CheckGroup<Person> group = new CheckGroup<>("group", new 
ArrayList<Person>());
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -58,9 +58,6 @@ public class CheckGroupPage extends WicketExamplePage
                ListView<Person> persons = new ListView<Person>("persons",
                        ComponentReferenceApplication.getPersons())
                {
-                       /**
-                        * @see 
org.apache.wicket.markup.html.list.ListView#populateItem(org.apache.wicket.markup.html.list.ListItem)
-                        */
                        @Override
                        protected void populateItem(ListItem<Person> item)
                        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage2.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage2.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage2.java
index f098b87..7ae1e79 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage2.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/CheckGroupPage2.java
@@ -27,6 +27,7 @@ import org.apache.wicket.markup.html.form.Form;
 import org.apache.wicket.markup.html.list.ListItem;
 import org.apache.wicket.markup.html.list.ListView;
 import org.apache.wicket.markup.html.panel.FeedbackPanel;
+import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.PropertyModel;
 
 
@@ -63,15 +64,15 @@ public class CheckGroupPage2 extends WicketExamplePage
                ListView<Person> persons = new ListView<Person>("persons",
                        ComponentReferenceApplication.getPersons())
                {
-
                        @Override
                        protected void populateItem(ListItem<Person> item)
                        {
-                               item.add(new Check<>("checkbox", 
item.getModel(), group));
-                               item.add(new Check<>("checkbox2", 
item.getModel(), group2));
+                               IModel<Person> personModel = item.getModel();
+                               item.add(new Check<>("checkbox", personModel, 
group));
+                               item.add(new Check<>("checkbox2", personModel, 
group2));
                                item.add(new Label("name",
                                        new 
PropertyModel<>(item.getDefaultModel(), "name")));
-                               item.add(new Label("lastName", new 
PropertyModel<String>(item.getDefaultModel(),
+                               item.add(new Label("lastName", new 
PropertyModel<String>(personModel,
                                        "lastName")));
                        }
 

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ComponentReferenceApplication.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ComponentReferenceApplication.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ComponentReferenceApplication.java
index 699f28d..a4bd3c9 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ComponentReferenceApplication.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ComponentReferenceApplication.java
@@ -48,16 +48,6 @@ public class ComponentReferenceApplication extends 
WicketExampleApplication
                return personsDB;
        }
 
-       /**
-        * Constructor.
-        */
-       public ComponentReferenceApplication()
-       {
-       }
-
-       /**
-        * @see org.apache.wicket.examples.WicketExampleApplication#init()
-        */
        @Override
        protected void init()
        {
@@ -66,9 +56,6 @@ public class ComponentReferenceApplication extends 
WicketExampleApplication
                getResourceSettings().setThrowExceptionOnMissingResource(false);
        }
 
-       /**
-        * @see org.apache.wicket.Application#getHomePage()
-        */
        @Override
        public Class<? extends Page> getHomePage()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/Count.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/Count.java 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/Count.java
index 7374c6f..5bb382d 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/Count.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/Count.java
@@ -57,9 +57,6 @@ final class Count implements IClusterable
                count--;
        }
 
-       /**
-        * @see java.lang.Object#toString()
-        */
        @Override
        public String toString()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/DropDownChoicePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/DropDownChoicePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/DropDownChoicePage.java
index e553f34..78931cb 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/DropDownChoicePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/DropDownChoicePage.java
@@ -54,7 +54,7 @@ public class DropDownChoicePage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSumbit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -75,7 +75,7 @@ public class DropDownChoicePage extends WicketExamplePage
                // which can be found in DropDownChoicePage.properties
                form.add(new DropDownChoice<>("site", SITES));
 
-               // Allthough the default behavior of displaying the string
+               // Although the default behavior of displaying the string
                // representations of the choices
                // by calling toString on the object might be alright in some 
cases, you
                // usually want to have
@@ -139,9 +139,6 @@ public class DropDownChoicePage extends WicketExamplePage
                /** the selected integer. */
                public Integer integer = INTEGERS.get(0);
 
-               /**
-                * @see java.lang.Object#toString()
-                */
                @Override
                public String toString()
                {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/FormPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/FormPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/FormPage.java
index a867b06..8c21116 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/FormPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/FormPage.java
@@ -38,7 +38,7 @@ public class FormPage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSubmit implementation that sets a 
message
-               add(new Form("form")
+               add(new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -72,4 +72,4 @@ public class FormPage extends WicketExamplePage
 
        }
 
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LabelPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LabelPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LabelPage.java
index e901790..68d5331 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LabelPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LabelPage.java
@@ -20,6 +20,7 @@ import java.util.Date;
 
 import org.apache.wicket.examples.WicketExamplePage;
 import org.apache.wicket.markup.html.basic.Label;
+import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.Model;
 import org.apache.wicket.model.StringResourceModel;
 
@@ -39,19 +40,9 @@ public class LabelPage extends WicketExamplePage
                // add a static label
                add(new Label("staticLabel", "static text"));
 
-               // add a dynamic label. For this example, we create an anonymous
-               // subclass
-               // of Model (just because it is less work then directly 
implementing
-               // IModel)
-               // that returns a new java.util.Date on each invocation
-               add(new Label("dynamicLabel", new Model<Date>()
-               {
-                       @Override
-                       public Date getObject()
-                       {
-                               return new Date();
-                       }
-               }));
+               // add a dynamic label. For this example, we create an 
anonymous subclass
+               // of IModel that returns a new java.util.Date on each 
invocation
+               add(new Label("dynamicLabel", Date::new));
 
                // add a label with a model that gets its display text from a 
resource
                // bundle

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LinkPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LinkPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LinkPage.java
index dbd16fb..9314f43 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LinkPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/LinkPage.java
@@ -16,11 +16,10 @@
  */
 package org.apache.wicket.examples.compref;
 
-import org.apache.wicket.AttributeModifier;
 import org.apache.wicket.examples.WicketExamplePage;
+import org.apache.wicket.lambda.Lambdas;
 import org.apache.wicket.markup.html.basic.Label;
 import org.apache.wicket.markup.html.link.Link;
-import org.apache.wicket.model.Model;
 import org.apache.wicket.model.PropertyModel;
 
 /**
@@ -42,40 +41,21 @@ public class LinkPage extends WicketExamplePage
 
                // add a link which, when clicked, increases our counter when a 
link is clicked, its onClick
                // method is called
-               Link link1 = new Link<Void>("link1")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               count1.increment();
-                       }
-               };
+               Link link1 = Link.onClick("link1", count1::increment);
                add(link1);
 
                // add a counter label to the link so that we can display it in 
the body of the link
-               link1.add(new Label("label1", new Model<String>()
-               {
-                       @Override
-                       public String getObject()
-                       {
-                               return count1.toString();
-                       }
-               }));
+               link1.add(new Label("label1", count1::toString));
 
                final Count count2 = new Count();
                // Same idea as above, but now we record a state change. Note 
that the URL will change
                // because of this, and pressing the back button and clicking 
the link again would revert to
                // the older value. The same thing could have been achieved by 
using setModelObject,
                // which implicitly registers a state change (of type 
ComponentModelChange).
-               Link linkWithStateChange = new Link<Void>("linkWithStateChange")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               count2.increment();
-                               addStateChange();
-                       }
-               };
+               Link linkWithStateChange = Link.onClick("linkWithStateChange", 
() -> {
+                       count2.increment();
+                       addStateChange();
+               });
                add(linkWithStateChange);
                linkWithStateChange.add(new Label("label", new 
PropertyModel<>(count2, "count")));
 
@@ -124,16 +104,7 @@ public class LinkPage extends WicketExamplePage
                        {
                                super(id);
                                count3 = new Count();
-                               add(new AttributeModifier("value", new 
Model<String>()
-                               {
-                                       @Override
-                                       public String getObject()
-                                       {
-                                               // we just replace the whole 
string. You could use custom AttributeModifiers
-                                               // to e.g. just replace one 
part of the string if you want
-                                               return "this button is clicked 
" + count3.getCount() + " times";
-                                       }
-                               }));
+                               add(Lambdas.onAttribute("value", oldValue -> 
"this button is clicked " + count3.getCount() + " times"));
                        }
 
                        @Override
@@ -160,31 +131,12 @@ public class LinkPage extends WicketExamplePage
                 */
                public ClickCountLabel(String id, final Count clickCount)
                {
-                       // call super with a simple annonymous class model that 
displays the
+                       // call super with a simple lambda model that displays 
the
                        // current number of clicks
-                       super(id, new Model<String>()
-                       {
-                               @Override
-                               public String getObject()
-                               {
-                                       return clickCount.toString();
-                               }
-                       });
+                       super(id, clickCount::toString);
                }
        }
 
-       // ----------
-
-       final Count count1 = new Count(); // simple counter object
-       Link link1 = new Link<Void>("link1")
-       {
-               @Override
-               public void onClick()
-               {
-                       count1.increment();
-               }
-       };
-
        /**
         * Override base method to provide an explanation
         */
@@ -207,4 +159,4 @@ public class LinkPage extends WicketExamplePage
                add(new ExplainPanel(html, code));
 
        }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListChoicePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListChoicePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListChoicePage.java
index cd563c7..21bc4bf 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListChoicePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListChoicePage.java
@@ -50,7 +50,7 @@ public class ListChoicePage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSumbit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -75,9 +75,6 @@ public class ListChoicePage extends WicketExamplePage
                /** the selected site. */
                public String site = SITES.get(0);
 
-               /**
-                * @see java.lang.Object#toString()
-                */
                @Override
                public String toString()
                {
@@ -104,4 +101,4 @@ public class ListChoicePage extends WicketExamplePage
 
        }
 
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListMultipleChoicePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListMultipleChoicePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListMultipleChoicePage.java
index 550c20a..867ebb5 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListMultipleChoicePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/ListMultipleChoicePage.java
@@ -18,15 +18,15 @@ package org.apache.wicket.examples.compref;
 
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.Iterator;
 import java.util.List;
 
-import org.apache.wicket.util.io.IClusterable;
 import org.apache.wicket.examples.WicketExamplePage;
 import org.apache.wicket.markup.html.form.Form;
 import org.apache.wicket.markup.html.form.ListMultipleChoice;
 import org.apache.wicket.markup.html.panel.FeedbackPanel;
 import org.apache.wicket.model.CompoundPropertyModel;
+import org.apache.wicket.util.io.IClusterable;
+import org.apache.wicket.util.string.Strings;
 
 
 /**
@@ -56,7 +56,7 @@ public class ListMultipleChoicePage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSubmit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -106,9 +106,6 @@ public class ListMultipleChoicePage extends 
WicketExamplePage
                        choices.add("Choice5");
                }
 
-               /**
-                * @see java.lang.Object#toString()
-                */
                @Override
                public String toString()
                {
@@ -117,16 +114,7 @@ public class ListMultipleChoicePage extends 
WicketExamplePage
 
                private String listAsString(List<String> list)
                {
-                StringBuilder b = new StringBuilder();
-                       for (Iterator<String> i = list.iterator(); i.hasNext();)
-                       {
-                               b.append(i.next());
-                               if (i.hasNext())
-                               {
-                                       b.append(", ");
-                               }
-                       }
-                       return b.toString();
+                       return Strings.join(", ", list);
                }
        }
 
@@ -152,4 +140,4 @@ public class ListMultipleChoicePage extends 
WicketExamplePage
                add(new ExplainPanel(html, code));
 
        }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/NonBookmarkablePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/NonBookmarkablePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/NonBookmarkablePage.java
index 67da021..2d633af 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/NonBookmarkablePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/NonBookmarkablePage.java
@@ -16,6 +16,7 @@
  */
 package org.apache.wicket.examples.compref;
 
+import org.apache.wicket.PageReference;
 import org.apache.wicket.markup.html.WebPage;
 import org.apache.wicket.markup.html.link.Link;
 
@@ -33,7 +34,7 @@ public class NonBookmarkablePage extends WebPage
         * @param referer
         *            the refering page
         */
-       public NonBookmarkablePage(final WebPage referer)
+       public NonBookmarkablePage(final PageReference referer)
        {
                if (referer == null)
                {
@@ -42,27 +43,8 @@ public class NonBookmarkablePage extends WebPage
 
                // Add a link to navigate back to the refering page. We now use 
the
                // PageLink
-               // constructor with the Page instance argument, because we 
allready have
-               // a page instance
-               // at our disposal
-               add(new Link<Void>("navigateBackLink")
-               {
-                       @Override
-                       public void onClick()
-                       {
-                               setResponsePage(referer);
-                       }
-
-               });
-
-               // Note that this would have had the same effect
-               //
-               // add(new Link("navigateBackLink")
-               // {
-               // public void onClick()
-               // {
-               // setResponsePage(referer);
-               // }
-               // });
+               // constructor with the Page instance argument, because we 
already have
+               // a page instance at our disposal
+               add(Link.onClick("navigateBackLink", () -> 
setResponsePage(referer.getPage())));
        }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/PalettePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/PalettePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/PalettePage.java
index b5d7e30..5cc6f49 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/PalettePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/PalettePage.java
@@ -49,7 +49,7 @@ public class PalettePage extends WicketExamplePage
 
                final Palette<Person> palette = new Palette<Person>("palette", 
new ListModel<>(
 
-                       new ArrayList<Person>()), new 
CollectionModel<>(persons), renderer, 10, true, true);
+                       new ArrayList<>()), new CollectionModel<>(persons), 
renderer, 10, true, true);
 
                palette.add(new DefaultTheme());
 

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioChoicePage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioChoicePage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioChoicePage.java
index 96945f2..bec789a 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioChoicePage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioChoicePage.java
@@ -53,7 +53,7 @@ public class RadioChoicePage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSumbit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -114,4 +114,4 @@ public class RadioChoicePage extends WicketExamplePage
 
        }
 
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage.java
index d88fe5e..79d7189 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage.java
@@ -24,6 +24,7 @@ import org.apache.wicket.markup.html.form.RadioGroup;
 import org.apache.wicket.markup.html.list.ListItem;
 import org.apache.wicket.markup.html.list.ListView;
 import org.apache.wicket.markup.html.panel.FeedbackPanel;
+import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.Model;
 import org.apache.wicket.model.PropertyModel;
 
@@ -42,7 +43,7 @@ public class RadioGroupPage extends WicketExamplePage
        {
 
                final RadioGroup<Person> group = new RadioGroup<>("group", new 
Model<Person>());
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -57,15 +58,13 @@ public class RadioGroupPage extends WicketExamplePage
                ListView<Person> persons = new ListView<Person>("persons",
                        ComponentReferenceApplication.getPersons())
                {
-
                        @Override
                        protected void populateItem(ListItem<Person> item)
                        {
-                               item.add(new Radio<>("radio", item.getModel()));
-                               item.add(new Label("name",
-                                       new 
PropertyModel<>(item.getDefaultModel(), "name")));
-                               item.add(new Label("lastName", new 
PropertyModel<String>(item.getDefaultModel(),
-                                       "lastName")));
+                               IModel<Person> personModel = item.getModel();
+                               item.add(new Radio<>("radio", personModel));
+                               item.add(new Label("name", new 
PropertyModel<>(personModel, "name")));
+                               item.add(new Label("lastName", new 
PropertyModel<String>(personModel, "lastName")));
                        }
 
                };

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage2.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage2.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage2.java
index 526a639..b5e8998 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage2.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RadioGroupPage2.java
@@ -24,6 +24,7 @@ import org.apache.wicket.markup.html.form.RadioGroup;
 import org.apache.wicket.markup.html.list.ListItem;
 import org.apache.wicket.markup.html.list.ListView;
 import org.apache.wicket.markup.html.panel.FeedbackPanel;
+import org.apache.wicket.model.IModel;
 import org.apache.wicket.model.Model;
 import org.apache.wicket.model.PropertyModel;
 
@@ -60,18 +61,15 @@ public class RadioGroupPage2 extends WicketExamplePage
                ListView<Person> persons = new ListView<Person>("persons",
                        ComponentReferenceApplication.getPersons())
                {
-
                        @Override
                        protected void populateItem(ListItem<Person> item)
                        {
-                               item.add(new Radio<>("radio", item.getModel(), 
group));
-                               item.add(new Radio<>("radio2", item.getModel(), 
group2));
-                               item.add(new Label("name",
-                                       new 
PropertyModel<>(item.getDefaultModel(), "name")));
-                               item.add(new Label("lastName", new 
PropertyModel<String>(item.getDefaultModel(),
-                                       "lastName")));
+                               IModel<Person> model = item.getModel();
+                               item.add(new Radio<>("radio", model, group));
+                               item.add(new Radio<>("radio2", model, group2));
+                               item.add(new Label("name", new 
PropertyModel<>(model, "name")));
+                               item.add(new Label("lastName", new 
PropertyModel<String>(model, "lastName")));
                        }
-
                };
 
                group2.add(persons);

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RecursivePanel.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RecursivePanel.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RecursivePanel.java
index 05f6feb..3331659 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RecursivePanel.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/RecursivePanel.java
@@ -66,14 +66,11 @@ public final class RecursivePanel extends Panel
                        super(name, list);
                }
 
-               /**
-                * @see 
org.apache.wicket.markup.html.list.ListView#populateItem(org.apache.wicket.markup.html.list.ListItem)
-                */
                @SuppressWarnings("unchecked")
                @Override
                protected void populateItem(ListItem<Object> listItem)
                {
-                       Object modelObject = listItem.getDefaultModelObject();
+                       Object modelObject = listItem.getModelObject();
 
                        if (modelObject instanceof List)
                        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/SelectPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/SelectPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/SelectPage.java
index e858f6b..1b7ecdd 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/SelectPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/SelectPage.java
@@ -103,7 +103,7 @@ public class SelectPage extends WicketExamplePage
                        }
 
                };
-               IModel<Collection<String>> model = new CollectionModel<String>(
+               IModel<Collection<String>> model = new CollectionModel<>(
                        MANY_CHOICES);
                choices.add(new SelectOptions<>("manychoices", model, 
renderer));
 
@@ -178,4 +178,4 @@ public class SelectPage extends WicketExamplePage
                add(new ExplainPanel(html, code));
 
        }
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TabbedPanelPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TabbedPanelPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TabbedPanelPage.java
index 8baf818..06db52f 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TabbedPanelPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TabbedPanelPage.java
@@ -53,7 +53,7 @@ public class TabbedPanelPage extends WicketExamplePage
 
                // create a list of ITab objects used to feed the tabbed panel
                final List<ITab> tabs = new ArrayList<>();
-               tabs.add(new AbstractTab(new Model<String>("first tab"))
+               tabs.add(new AbstractTab(new Model<>("first tab"))
                {
                        private static final long serialVersionUID = 1L;
 
@@ -65,7 +65,7 @@ public class TabbedPanelPage extends WicketExamplePage
 
                });
 
-               tabs.add(new AbstractTab(new Model<String>("second tab"))
+               tabs.add(new AbstractTab(new Model<>("second tab"))
                {
                        private static final long serialVersionUID = 1L;
 
@@ -77,7 +77,7 @@ public class TabbedPanelPage extends WicketExamplePage
 
                });
 
-               tabs.add(new AbstractTab(new Model<String>("third tab"))
+               tabs.add(new AbstractTab(new Model<>("third tab"))
                {
                        private static final long serialVersionUID = 1L;
 
@@ -121,18 +121,12 @@ public class TabbedPanelPage extends WicketExamplePage
                        this.clazz = clazz;
                }
 
-               /**
-                * @see org.apache.wicket.markup.html.link.Link#onClick()
-                */
                @Override
                public void onClick()
                {
                        TabbedPanelPage.this.setDefaultModelObject(clazz);
                }
 
-               /**
-                * @see org.apache.wicket.markup.html.link.Link#isEnabled()
-                */
                @Override
                public boolean isEnabled()
                {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextAreaPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextAreaPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextAreaPage.java
index 9549844..486a0f5 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextAreaPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextAreaPage.java
@@ -44,7 +44,7 @@ public class TextAreaPage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSumbit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<Void> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -64,9 +64,6 @@ public class TextAreaPage extends WicketExamplePage
                /** some plain text. */
                public String text = "line 1\nline 2\nline 3";
 
-               /**
-                * @see java.lang.Object#toString()
-                */
                @Override
                public String toString()
                {
@@ -86,4 +83,4 @@ public class TextAreaPage extends WicketExamplePage
                add(new ExplainPanel(html, code));
        }
 
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextFieldPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextFieldPage.java
 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextFieldPage.java
index 3ed2bf7..f06b400 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextFieldPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/TextFieldPage.java
@@ -42,7 +42,7 @@ public class TextFieldPage extends WicketExamplePage
                // when components do not have an explicit model, but on of 
their
                // parents
                // has the compound property model set, it will use that 
parent's model
-               // as the taget for getting and setting the property which is 
based on
+               // as the target for getting and setting the property which is 
based on
                // its own component id. Thus, component with id 'text' will 
act as if
                // its
                // model is property 'text' of the compound property model. And 
as the
@@ -57,7 +57,7 @@ public class TextFieldPage extends WicketExamplePage
                add(feedbackPanel);
 
                // Add a form with an onSumbit implementation that sets a 
message
-               Form<?> form = new Form("form")
+               Form<?> form = new Form<Void>("form")
                {
                        @Override
                        protected void onSubmit()
@@ -113,9 +113,6 @@ public class TextFieldPage extends WicketExamplePage
                /** an integer. */
                public Integer integer = 12;
 
-               /**
-                * @see java.lang.Object#toString()
-                */
                @Override
                public String toString()
                {
@@ -152,4 +149,4 @@ public class TextFieldPage extends WicketExamplePage
 
        }
 
-}
\ No newline at end of file
+}

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-examples/src/main/java/org/apache/wicket/examples/compref/XmlPage.java
----------------------------------------------------------------------
diff --git 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/XmlPage.java 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/XmlPage.java
index 75e5f89..e852a70 100644
--- 
a/wicket-examples/src/main/java/org/apache/wicket/examples/compref/XmlPage.java
+++ 
b/wicket-examples/src/main/java/org/apache/wicket/examples/compref/XmlPage.java
@@ -41,9 +41,6 @@ public class XmlPage extends WebPage
                add(new PersonsListView("persons", 
ComponentReferenceApplication.getPersons()));
        }
 
-       /**
-        * @see org.apache.wicket.MarkupContainer#getMarkupType()
-        */
        @Override
        public MarkupType getMarkupType()
        {

http://git-wip-us.apache.org/repos/asf/wicket/blob/5ec3ecb5/wicket-extensions/src/main/java/org/apache/wicket/extensions/markup/html/tabs/AbstractTab.java
----------------------------------------------------------------------
diff --git 
a/wicket-extensions/src/main/java/org/apache/wicket/extensions/markup/html/tabs/AbstractTab.java
 
b/wicket-extensions/src/main/java/org/apache/wicket/extensions/markup/html/tabs/AbstractTab.java
index a9ace0a..f7a9b56 100644
--- 
a/wicket-extensions/src/main/java/org/apache/wicket/extensions/markup/html/tabs/AbstractTab.java
+++ 
b/wicket-extensions/src/main/java/org/apache/wicket/extensions/markup/html/tabs/AbstractTab.java
@@ -43,27 +43,18 @@ public abstract class AbstractTab implements ITab
                this.title = title;
        }
 
-       /**
-        * {@inheritDoc}
-        */
        @Override
        public IModel<String> getTitle()
        {
                return title;
        }
 
-       /**
-        * {@inheritDoc}
-        */
        @Override
        public boolean isVisible()
        {
                return true;
        }
 
-       /**
-        * {@inheritDoc}
-        */
        @Override
        public abstract WebMarkupContainer getPanel(final String panelId);
-}
\ No newline at end of file
+}

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