Hi, I was chatting to Alex Buckley at DevoxxUS about my experiences migrating a project to using Java 9 modules (specifically, this project: https://github.com/trishagee/sense-nine) and mentioned some surprising behaviour in a module that uses JavaFX. I've been asked to send the details so people can take a look at it.
My module-info.java is here: https://github.com/trishagee/sense-nine/blob/master/src/com.mechanitis.demo.sense.client/module-info.java Note that I have to export two additional packages (mood and user), and I did not expect (or really want) to. This is because I was getting this error if I did not: java.lang.reflect.InvocationTargetException 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:547) at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:482) at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:381) 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:547) at java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:912) Caused by: java.lang.RuntimeException: Exception in Application start method at javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:982) at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication$2(LauncherImpl.java:200) at java.base/java.lang.Thread.run(Thread.java:844) Caused by: java.lang.RuntimeException: *java.lang.IllegalAccessException: class sun.reflect.misc.Trampoline cannot access class com.mechanitis.demo.sense.client.user.TwitterUser (in module com.mechanitis.demo.sense.client) because module com.mechanitis.demo.sense.client does not export com.mechanitis.demo.sense.client.user to unnamed module @779d6cc6* at javafx.base/com.sun.javafx.property.PropertyReference.getProperty(PropertyReference.java:200) at javafx.controls/javafx.scene.control.cell.PropertyValueFactory.getCellDataReflectively(PropertyValueFactory.java:145) at javafx.controls/javafx.scene.control.cell.PropertyValueFactory.call(PropertyValueFactory.java:119) at javafx.controls/javafx.scene.control.cell.PropertyValueFactory.call(PropertyValueFactory.java:98) at javafx.controls/javafx.scene.control.TableColumn.getCellObservableValue(TableColumn.java:579) at javafx.controls/javafx.scene.control.TableColumn.getCellObservableValue(TableColumn.java:564) at javafx.controls/javafx.scene.control.TableCell.updateItem(TableCell.java:645) at javafx.controls/javafx.scene.control.TableCell.indexChanged(TableCell.java:468) at javafx.controls/javafx.scene.control.IndexedCell.updateIndex(IndexedCell.java:116) at javafx.controls/javafx.scene.control.skin.TableRowSkinBase.updateCells(TableRowSkinBase.java:534) at javafx.controls/javafx.scene.control.skin.TableRowSkinBase.<init>(TableRowSkinBase.java:159) at javafx.controls/javafx.scene.control.skin.TableRowSkin.<init>(TableRowSkin.java:89) at javafx.controls/javafx.scene.control.TableRow.createDefaultSkin(TableRow.java:212) at javafx.controls/javafx.scene.control.Control.doProcessCSS(Control.java:895) at javafx.controls/javafx.scene.control.Control.access$000(Control.java:83) at javafx.controls/javafx.scene.control.Control$1.doProcessCSS(Control.java:89) at javafx.controls/com.sun.javafx.scene.control.ControlHelper.processCSSImpl(ControlHelper.java:67) at javafx.graphics/com.sun.javafx.scene.NodeHelper.processCSS(NodeHelper.java:147) at javafx.graphics/javafx.scene.Node.processCSS(Node.java:9356) at javafx.graphics/javafx.scene.Node.applyCss(Node.java:9443) at javafx.controls/javafx.scene.control.skin.VirtualFlow.setCellIndex(VirtualFlow.java:1697) at javafx.controls/javafx.scene.control.skin.VirtualFlow.getCell(VirtualFlow.java:1674) at javafx.controls/javafx.scene.control.skin.VirtualFlow.getCellLength(VirtualFlow.java:1781) at javafx.controls/javafx.scene.control.skin.VirtualFlow.computeViewportOffset(VirtualFlow.java:2618) at javafx.controls/javafx.scene.control.skin.VirtualFlow.layoutChildren(VirtualFlow.java:1242) at javafx.graphics/javafx.scene.Parent.layout(Parent.java:1226) at javafx.graphics/javafx.scene.Parent.layout(Parent.java:1233) at javafx.graphics/javafx.scene.Parent.layout(Parent.java:1233) at javafx.graphics/javafx.scene.Parent.layout(Parent.java:1233) at javafx.graphics/javafx.scene.Scene.doLayoutPass(Scene.java:585) at javafx.graphics/javafx.scene.Scene.preferredSize(Scene.java:1767) at javafx.graphics/javafx.scene.Scene$2.preferredSize(Scene.java:389) at javafx.graphics/com.sun.javafx.scene.SceneHelper.preferredSize(SceneHelper.java:66) at javafx.graphics/javafx.stage.Window$12.invalidated(Window.java:1092) at javafx.base/javafx.beans.property.BooleanPropertyBase.markInvalid(BooleanPropertyBase.java:110) at javafx.base/javafx.beans.property.BooleanPropertyBase.set(BooleanPropertyBase.java:145) at javafx.graphics/javafx.stage.Window.setShowing(Window.java:1180) at javafx.graphics/javafx.stage.Window.show(Window.java:1195) at javafx.graphics/javafx.stage.Stage.show(Stage.java:267) at com.mechanitis.demo.sense.client/com.mechanitis.demo.sense.client.Dashboard.start(Dashboard.java:45) at javafx.graphics/com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$9(LauncherImpl.java:928) at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runAndWait$11(PlatformImpl.java:449) at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$9(PlatformImpl.java:418) at java.base/java.security.AccessController.doPrivileged(Native Method) at javafx.graphics/com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:417) at javafx.graphics/com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96) at javafx.graphics/com.sun.glass.ui.win.WinApplication._runLoop(Native Method) at javafx.graphics/com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:189) ... 1 more Caused by: java.lang.IllegalAccessException: class sun.reflect.misc.Trampoline cannot access class com.mechanitis.demo.sense.client.user.TwitterUser (in module com.mechanitis.demo.sense.client) because module com.mechanitis.demo.sense.client does not export com.mechanitis.demo.sense.client.user to unnamed module @779d6cc6 at java.base/jdk.internal.reflect.Reflection.throwIllegalAccessException(Reflection.java:423) at java.base/jdk.internal.reflect.Reflection.throwIllegalAccessException(Reflection.java:414) at java.base/jdk.internal.reflect.Reflection.ensureMemberAccess(Reflection.java:112) at java.base/java.lang.reflect.AccessibleObject.slowCheckMemberAccess(AccessibleObject.java:632) at java.base/java.lang.reflect.AccessibleObject.checkAccess(AccessibleObject.java:624) at java.base/java.lang.reflect.Method.invoke(Method.java:539) at sun.reflect.misc.Trampoline.invoke(MethodUtil.java:72) at jdk.internal.reflect.GeneratedMethodAccessor2.invoke(Unknown Source) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:547) at java.base/sun.reflect.misc.MethodUtil.invoke(MethodUtil.java:261) at javafx.base/com.sun.javafx.property.PropertyReference.getProperty(PropertyReference.java:198) ... 48 more When I discovered this I was a bit stumped about what was in the unnamed module, given this appears to be JavaFX code causing this. I'm running this from inside IntelliJ IDEA, this is the command it's calling: "C:\Program Files\Java\jdk-9\bin\java" -Djava.util.logging.config.file=logging.properties -javaagent:C:\Users\Trisha\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\171.3780.107\lib\idea_rt.jar=54310:C:\Users\Trisha\AppData\Local\JetBrains\Toolbox\apps\IDEA-U\ch-0\171.3780.107\bin -Dfile.encoding=UTF-8 -p C:\Users\Trisha\Projects\trishagee\sense-nine\out\production\com.mechanitis.demo.sense.client;C:\Users\Trisha\Projects\trishagee\sense-nine\out\production\com.mechanitis.demo.sense.service;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\javax-websocket-server-impl\9.4.1.v20170120\javax-websocket-server-impl-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-annotations\9.4.1.v20170120\jetty-annotations-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-plus\9.4.1.v20170120\jetty-plus-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-webapp\9.4.1.v20170120\jetty-webapp-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-xml\9.4.1.v20170120\jetty-xml-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-util\9.4.1.v20170120\jetty-util-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-servlet\9.4.1.v20170120\jetty-servlet-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-security\9.4.1.v20170120\jetty-security-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-server\9.4.1.v20170120\jetty-server-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\javax\servlet\javax.servlet-api\3.1.0\javax.servlet-api-3.1.0.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-http\9.4.1.v20170120\jetty-http-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-io\9.4.1.v20170120\jetty-io-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-jndi\9.4.1.v20170120\jetty-jndi-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\javax\annotation\javax.annotation-api\1.2\javax.annotation-api-1.2.jar;C:\Users\Trisha\.m2\repository\org\ow2\asm\asm\5.1\asm-5.1.jar;C:\Users\Trisha\.m2\repository\org\ow2\asm\asm-commons\5.1\asm-commons-5.1.jar;C:\Users\Trisha\.m2\repository\org\ow2\asm\asm-tree\5.1\asm-tree-5.1.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\javax-websocket-client-impl\9.4.1.v20170120\javax-websocket-client-impl-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\websocket-client\9.4.1.v20170120\websocket-client-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\jetty-client\9.4.1.v20170120\jetty-client-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\websocket-common\9.4.1.v20170120\websocket-common-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\websocket-api\9.4.1.v20170120\websocket-api-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\javax\websocket\javax.websocket-api\1.0\javax.websocket-api-1.0.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\websocket-server\9.4.1.v20170120\websocket-server-9.4.1.v20170120.jar;C:\Users\Trisha\.m2\repository\org\eclipse\jetty\websocket\websocket-servlet\9.4.1.v20170120\websocket-servlet-9.4.1.v20170120.jar -m com.mechanitis.demo.sense.client/com.mechanitis.demo.sense.client.Dashboard Thanks, Trisha
