So this is the error, notice also that refreshing cn1libs seems to be a 
heavy load for the IDE, because it blocks for many seconds.

Generating GUI sources
timeStr=1.0.0-1599049594262-1594631340920, 
lastTime=1.0.0-1598183928366-1594631340920
Processing GUI builder file: 
/home/pc/IdeaProjects/myappcp/src/com/myappcp/app/HTMLEditor.java
Attempting to generate GUI sources for 
/home/pc/IdeaProjects/myappcp/res/guibuilder/com/myappcp/app/HTMLEditor.gui 
with System JAXB
Failed to generate Gui Source with System JAXB.  Will attempt using bundled 
JAXB.
set 03, 2020 12:16:29 PM com.codename1.build.client.GenerateGuiSources 
generateGuiSource
INFORMAZIONI: null
/home/pc/IdeaProjects/myappcp/build.xml:532: java.lang.RuntimeException: 
java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:109)
at org.apache.tools.ant.Task.perform(Task.java:350)
at org.apache.tools.ant.Target.execute(Target.java:449)
at org.apache.tools.ant.Target.performTasks(Target.java:470)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
at org.apache.tools.ant.Project.executeTarget(Project.java:1361)
at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
at org.apache.tools.ant.Main.runBuild(Main.java:834)
at org.apache.tools.ant.Main.startAnt(Main.java:223)
at org.apache.tools.ant.Main.start(Main.java:190)
at org.apache.tools.ant.Main.main(Main.java:274)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:31)
Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource(GenerateGuiSources.java:294)
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource(GenerateGuiSources.java:246)
at 
com.codename1.build.client.GenerateGuiSources.execute(GenerateGuiSources.java:216)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
... 16 more
Caused by: java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at 
org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1128)
at 
org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1296)
at 
org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1350)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1313)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166)
at java.base/java.lang.Class.getMethodsRecursive(Class.java:3307)
at java.base/java.lang.Class.getMethod0(Class.java:3293)
at java.base/java.lang.Class.getMethod(Class.java:2106)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:258)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:250)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:447)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:652)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:599)
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource_(GenerateGuiSources.java:301)
at 
com.codename1.build.client.GenerateGuiSources.access$000(GenerateGuiSources.java:32)
at 
com.codename1.build.client.GenerateGuiSources$1.run(GenerateGuiSources.java:272)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: 
com.sun.xml.bind.v2.model.annotation.AnnotationReader
at 
org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1362)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1313)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 22 more
/home/pc/IdeaProjects/myappcp/build.xml:532: java.lang.RuntimeException: 
java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:109)
at org.apache.tools.ant.Task.perform(Task.java:350)
at org.apache.tools.ant.Target.execute(Target.java:449)
at org.apache.tools.ant.Target.performTasks(Target.java:470)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
at org.apache.tools.ant.Project.executeTarget(Project.java:1361)
at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
at org.apache.tools.ant.Main.runBuild(Main.java:834)
at org.apache.tools.ant.Main.startAnt(Main.java:223)
at org.apache.tools.ant.Main.start(Main.java:190)
at org.apache.tools.ant.Main.main(Main.java:274)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:31)
Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource(GenerateGuiSources.java:294)
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource(GenerateGuiSources.java:246)
at 
com.codename1.build.client.GenerateGuiSources.execute(GenerateGuiSources.java:216)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
... 16 more
Caused by: java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at 
org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1128)
at 
org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1296)
at 
org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1350)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1313)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166)
at java.base/java.lang.Class.getMethodsRecursive(Class.java:3307)
at java.base/java.lang.Class.getMethod0(Class.java:3293)
at java.base/java.lang.Class.getMethod(Class.java:2106)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:258)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:250)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:447)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:652)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:599)
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource_(GenerateGuiSources.java:301)
at 
com.codename1.build.client.GenerateGuiSources.access$000(GenerateGuiSources.java:32)
at 
com.codename1.build.client.GenerateGuiSources$1.run(GenerateGuiSources.java:272)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: 
com.sun.xml.bind.v2.model.annotation.AnnotationReader
at 
org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1362)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1313)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 22 more
/home/pc/IdeaProjects/myappcp/build.xml:532: java.lang.RuntimeException: 
java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:109)
at org.apache.tools.ant.Task.perform(Task.java:350)
at org.apache.tools.ant.Target.execute(Target.java:449)
at org.apache.tools.ant.Target.performTasks(Target.java:470)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1388)
at org.apache.tools.ant.Project.executeTarget(Project.java:1361)
at 
org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
at org.apache.tools.ant.Main.runBuild(Main.java:834)
at org.apache.tools.ant.Main.startAnt(Main.java:223)
at org.apache.tools.ant.Main.start(Main.java:190)
at org.apache.tools.ant.Main.main(Main.java:274)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:31)
Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource(GenerateGuiSources.java:294)
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource(GenerateGuiSources.java:246)
at 
com.codename1.build.client.GenerateGuiSources.execute(GenerateGuiSources.java:216)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at 
org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99)
... 16 more
Caused by: java.lang.NoClassDefFoundError: 
com/sun/xml/bind/v2/model/annotation/AnnotationReader
at java.base/java.lang.ClassLoader.defineClass1(Native Method)
at java.base/java.lang.ClassLoader.defineClass(ClassLoader.java:1017)
at 
org.apache.tools.ant.AntClassLoader.defineClassFromData(AntClassLoader.java:1128)
at 
org.apache.tools.ant.AntClassLoader.getClassFromStream(AntClassLoader.java:1296)
at 
org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1350)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1313)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
at java.base/java.lang.Class.getDeclaredMethods0(Native Method)
at java.base/java.lang.Class.privateGetDeclaredMethods(Class.java:3166)
at java.base/java.lang.Class.getMethodsRecursive(Class.java:3307)
at java.base/java.lang.Class.getMethod0(Class.java:3293)
at java.base/java.lang.Class.getMethod(Class.java:2106)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:258)
at javax.xml.bind.ContextFinder.newInstance(ContextFinder.java:250)
at javax.xml.bind.ContextFinder.find(ContextFinder.java:447)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:652)
at javax.xml.bind.JAXBContext.newInstance(JAXBContext.java:599)
at 
com.codename1.build.client.GenerateGuiSources.generateGuiSource_(GenerateGuiSources.java:301)
at 
com.codename1.build.client.GenerateGuiSources.access$000(GenerateGuiSources.java:32)
at 
com.codename1.build.client.GenerateGuiSources$1.run(GenerateGuiSources.java:272)
at java.base/java.lang.Thread.run(Thread.java:834)
Caused by: java.lang.ClassNotFoundException: 
com.sun.xml.bind.v2.model.annotation.AnnotationReader
at 
org.apache.tools.ant.AntClassLoader.findClassInComponents(AntClassLoader.java:1362)
at org.apache.tools.ant.AntClassLoader.findClass(AntClassLoader.java:1313)
at org.apache.tools.ant.AntClassLoader.loadClass(AntClassLoader.java:1068)
at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
... 22 more

Ant build completed with 3 errors and 2 warnings in 5s at 03/09/20, 12:16

Il giorno giovedì 3 settembre 2020 alle 05:49:49 UTC+2 Shai Almog ha 
scritto:

> Switch intellij to text mode and you'll see the real error. See: 
> https://www.codenameone.com/blog/tip-intellij-idea-ram.html
>
> On Wednesday, September 2, 2020 at 12:47:33 PM UTC+3 P5music wrote:
>
>> Sorry, the real error when refreshing is (just some lines are provided 
>> here)
>>
>> Compile is forcing compliance to the supported API's/features for maximum 
>> device compatibility. This allows smaller
>> ...
>> /home/pc/IdeaProjects/myappcp/build.xml:66: Compile failed; see the 
>> compiler error output for details.
>> at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:292)
>> at jdk.internal.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
>> at 
>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> at java.base/java.lang.reflect.Method.invoke(Method.java:566)
>> ...
>> at 
>> org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
>> ...
>> at 
>> java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>> at 
>> java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>> ...
>> at com.intellij.rt.ant.execution.AntMain2.main(AntMain2.java:31)
>> Il giorno mercoledì 2 settembre 2020 alle 10:08:16 UTC+2 P5music ha 
>> scritto:
>>
>>> The cn1filechooser library is installed. If I refresh cn1 libraries I 
>>> get the error, yes.
>>>
>>> Il giorno mercoledì 2 settembre 2020 alle 03:44:47 UTC+2 Shai Almog ha 
>>> scritto:
>>>
>>>> They should be filled from the cn1libs you install. Do you get a 
>>>> similar error when you refresh the cn1libs after the download?
>>>> On Tuesday, September 1, 2020 at 11:22:02 AM UTC+3 P5music wrote:
>>>>
>>>>> The Generate Native Access command does not work, so the native 
>>>>> directories like iOS and internal_tmp are empty, although they are in 
>>>>> fact 
>>>>> under the project classpath.
>>>>>
>>>>>
>>>>> Il giorno martedì 1 settembre 2020 alle 03:32:37 UTC+2 Shai Almog ha 
>>>>> scritto:
>>>>>
>>>>>> Is that class inside your internal_tmp/native hierarchy?
>>>>>> Is that directory in your project classpath?
>>>>>> On Monday, August 31, 2020 at 8:46:02 PM UTC+3 P5music wrote:
>>>>>>
>>>>>>> Yes it was outdated, I saved and now it does not alert me anymore, 
>>>>>>> so it is up-to-date I think, but when I quit from there it keeps saying 
>>>>>>> something was not saved, maybe a .lock or something else? However it 
>>>>>>> seems 
>>>>>>> that it saves correctly.
>>>>>>>
>>>>>>> I notice also that two identical packages were in the Ant window, I 
>>>>>>> removed one (I remember this "doubling" issue in the past for something 
>>>>>>> else I do not recall now)
>>>>>>>
>>>>>>> I did what you say, run build, invalidated caches and restarted, but 
>>>>>>> at runtime I get:
>>>>>>>
>>>>>>> java.lang.ClassNotFoundException: 
>>>>>>> com.codename1.ext.filechooser.FileChooserNativeImpl
>>>>>>> at 
>>>>>>> java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
>>>>>>> at 
>>>>>>> java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
>>>>>>> at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
>>>>>>> at 
>>>>>>> java.base/java.lang.ClassLoader.findSystemClass(ClassLoader.java:1248)
>>>>>>> at 
>>>>>>> com.codename1.impl.javase.ClassPathLoader.findClass(ClassPathLoader.java:269)
>>>>>>> at 
>>>>>>> com.codename1.impl.javase.ClassPathLoader.loadClass(ClassPathLoader.java:109)
>>>>>>> at java.base/java.lang.Class.forName0(Native Method)
>>>>>>> at java.base/java.lang.Class.forName(Class.java:315)
>>>>>>> at com.codename1.system.NativeLookup.create(NativeLookup.java:82)
>>>>>>> at 
>>>>>>> com.codename1.ext.filechooser.FileChooser.nativePeer(FileChooser.java:66)
>>>>>>> at 
>>>>>>> com.codename1.ext.filechooser.FileChooser.isAvailable(FileChooser.java:95)
>>>>>>> at com.myappcp.app.Utils.fileChooser(Utils.java:315)
>>>>>>> at com.myappcp.app.myapp.lambda$start$5(myapp.java:138)
>>>>>>> at com.codename1.ui.Command$1.actionPerformed(Command.java:332)
>>>>>>> at com.codename1.ui.Form.dispatchCommand(Form.java:2082)
>>>>>>> at 
>>>>>>> com.codename1.ui.SideMenuBar$CommandWrapper$ShowWaiter.run(SideMenuBar.java:1782)
>>>>>>> at com.codename1.ui.Display.processSerialCalls(Display.java:1331)
>>>>>>> at com.codename1.ui.Display.edtLoopImpl(Display.java:1274)
>>>>>>> at com.codename1.ui.Display.mainEDTLoop(Display.java:1162)
>>>>>>> at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
>>>>>>> at 
>>>>>>> com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)
>>>>>>> [EDT] 0:0:15,625 - Exception: java.lang.ClassNotFoundException - 
>>>>>>> com.codename1.ext.filechooser.FileChooserNativeImpl
>>>>>>>
>>>>>>> I remind you that at compile time the error
>>>>>>>
>>>>>>> /home/pc/IdeaProjects/myappcp/build.xml:532: 
>>>>>>> java.lang.RuntimeException: java.lang.NoClassDefFoundError: 
>>>>>>> com/sun/xml/bind/v2/model/annotation/AnnotationReader
>>>>>>>
>>>>>>> is issued, although the compilation succeed and the app runs in the 
>>>>>>> simulator (it's for generated interface if I am not wrong).
>>>>>>> Could it be related?
>>>>>>> Il giorno lunedì 31 agosto 2020 alle 06:26:27 UTC+2 Shai Almog ha 
>>>>>>> scritto:
>>>>>>>
>>>>>>>> First make sure your build XML is up to date. Open Codename One 
>>>>>>>> Preferences and click Save. If it's out of date you'll get a prompt 
>>>>>>>> asking 
>>>>>>>> you to update it.
>>>>>>>>
>>>>>>>> Then click the Ant panel on the right side of the IDE and select 
>>>>>>>> the jar target. Try running it with the right click menu.
>>>>>>>>
>>>>>>>> On Sunday, August 30, 2020 at 6:03:42 PM UTC+3 P5music wrote:
>>>>>>>>
>>>>>>>>> So what do I have to do? I am not an advanced IntellJ Idea user.
>>>>>>>>>
>>>>>>>>> Il giorno domenica 30 agosto 2020 alle 03:40:38 UTC+2 Shai Almog 
>>>>>>>>> ha scritto:
>>>>>>>>>
>>>>>>>>>> The JAR target sets paths and refreshes some things in cn1libs. 
>>>>>>>>>>
>>>>>>>>>> On Saturday, August 29, 2020 at 10:34:16 AM UTC+3 P5music wrote:
>>>>>>>>>>
>>>>>>>>>>> It's at runtime in fact.
>>>>>>>>>>> It is on FileChooser.isAvailable() instruction, if I remove it I 
>>>>>>>>>>> have NullPointerException on FileChooser.showOpenDialog() 
>>>>>>>>>>> Maybe some initialization is necessary before using that class?
>>>>>>>>>>> Il giorno sabato 29 agosto 2020 alle 07:47:37 UTC+2 Shai Almog 
>>>>>>>>>>> ha scritto:
>>>>>>>>>>>
>>>>>>>>>>>> That's just an IntelliJ warning that should be fine. Try 
>>>>>>>>>>>> running the ant jar target and see if it works around that 
>>>>>>>>>>>> exception.
>>>>>>>>>>>>
>>>>>>>>>>>> On Friday, August 28, 2020 at 12:03:52 PM UTC+3 P5music wrote:
>>>>>>>>>>>>
>>>>>>>>>>>>> I get this:
>>>>>>>>>>>>>
>>>>>>>>>>>>>  Exception: java.lang.ClassNotFoundException - 
>>>>>>>>>>>>> com.codename1.ext.filechooser.FileChooserNativeImpl
>>>>>>>>>>>>> java.lang.ClassNotFoundException: 
>>>>>>>>>>>>> com.codename1.ext.filechooser.FileChooserNativeImpl
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:581)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> java.base/java.lang.ClassLoader.findSystemClass(ClassLoader.java:1248)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> com.codename1.impl.javase.ClassPathLoader.findClass(ClassPathLoader.java:269)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> com.codename1.impl.javase.ClassPathLoader.loadClass(ClassPathLoader.java:109)
>>>>>>>>>>>>> at java.base/java.lang.Class.forName0(Native Method)
>>>>>>>>>>>>> at java.base/java.lang.Class.forName(Class.java:315)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> com.codename1.system.NativeLookup.create(NativeLookup.java:82)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> com.codename1.ext.filechooser.FileChooser.nativePeer(FileChooser.java:66)
>>>>>>>>>>>>> at 
>>>>>>>>>>>>> com.codename1.ext.filechooser.FileChooser.isAvailable(FileChooser.java:95)
>>>>>>>>>>>>> ...
>>>>>>>>>>>>> ...
>>>>>>>>>>>>> ...
>>>>>>>>>>>>>
>>>>>>>>>>>>> It says also that "Library source does not match the bytecode 
>>>>>>>>>>>>> for class FileChooser"
>>>>>>>>>>>>> Il giorno venerdì 28 agosto 2020 alle 06:58:22 UTC+2 Shai 
>>>>>>>>>>>>> Almog ha scritto:
>>>>>>>>>>>>>
>>>>>>>>>>>>>> There's this issue for sharing support: 
>>>>>>>>>>>>>> https://github.com/codenameone/CodenameOne/issues/3225 which 
>>>>>>>>>>>>>> seems to be close to what you're looking for.
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> There's file chooser but it's mostly for reading not for 
>>>>>>>>>>>>>> writing: 
>>>>>>>>>>>>>> https://github.com/shannah/cn1-filechooser/tree/master/CN1FileChooser
>>>>>>>>>>>>>>
>>>>>>>>>>>>>> On Thursday, August 27, 2020 at 1:26:01 PM UTC+3 P5music 
>>>>>>>>>>>>>> wrote:
>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> My app is derived from an Android app. The Android app lets 
>>>>>>>>>>>>>>> the user select folders where  exported data can be saved. This 
>>>>>>>>>>>>>>> is 
>>>>>>>>>>>>>>> accomplished by means of calling the Storage Access Framework 
>>>>>>>>>>>>>>> that is now 
>>>>>>>>>>>>>>> somehow mandatory I think, for OS versions not recent too, if I 
>>>>>>>>>>>>>>> am not 
>>>>>>>>>>>>>>> wrong.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> Now I am addressing the file save part (export).
>>>>>>>>>>>>>>> The user has to select the folder. I am not expert of iOS 
>>>>>>>>>>>>>>> way of handling app public directories and sharing files. But I 
>>>>>>>>>>>>>>> need that 
>>>>>>>>>>>>>>> functionality.
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> And I need the user selection of a file to read it, of 
>>>>>>>>>>>>>>> course (import).
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> (Sharing exported data directly, as with bluetooth or 
>>>>>>>>>>>>>>> sending to another app, and the incoming intent for import are 
>>>>>>>>>>>>>>> a separate 
>>>>>>>>>>>>>>> question, I will create another thread but it could be related 
>>>>>>>>>>>>>>> to this one)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>> How can achieve those two functionalities (import/export)?
>>>>>>>>>>>>>>> (Take into account that I  am focused on iOS port at present 
>>>>>>>>>>>>>>> time but I want that my Codename app can be also deployed on 
>>>>>>>>>>>>>>> Android in the 
>>>>>>>>>>>>>>> future with minimum changes and native code injection)
>>>>>>>>>>>>>>>
>>>>>>>>>>>>>>

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