I have a JavaFX application which I want to run under the JVisualVM profiler. However, I cannot access the menu items from the menu bar when running it under the profiler.
So far, my application is just a simple scene built with SceneBuilder. It has an AnchorPane and a default Menubar.
<?xml version="1.0" encoding="UTF-8"?>
<?import javafx.scene.control.*?>
<?import java.lang.*?>
<?import javafx.scene.layout.*?>
<?import javafx.scene.layout.AnchorPane?>
<AnchorPane minHeight="-Infinity" minWidth="-Infinity" prefHeight="200.0" prefWidth="200.0" xmlns="http://javafx.com/javafx/8" xmlns:fx="http://javafx.com/fxml/1">
<children>
<MenuBar layoutX="-41.0" layoutY="-12.0" AnchorPane.bottomAnchor="0.0" AnchorPane.leftAnchor="0.0" AnchorPane.rightAnchor="0.0" AnchorPane.topAnchor="0.0">
<menus>
<Menu mnemonicParsing="false" text="File">
<items>
<MenuItem mnemonicParsing="false" text="Close" />
</items>
</Menu>
</menus>
</MenuBar>
</children>
</AnchorPane>
The code is also straight-forward, nothing special:
@Override
public void start(Stage primaryStage) throws IOException
{
String path = "Window.fxml";
URL url = getClass().getClassLoader().getResource(path);
FXMLLoader loader = new FXMLLoader();
loader.setLocation(url);
Parent root = loader.load();
Scene scene = new Scene(root, 600, 400);
primaryStage.setScene(scene);
primaryStage.show();
}
I do the following:
- run the application from Eclipse until the window shows up,
- click on "File" to see whether "Close" becomes visible
- start JVisualVM,
- double click my application,
- go to the "Profiler" tab
- click "CPU" and wait until it has injected profiling instructions
- click on "File" again, but "Close" does not appear
In Eclipse I see the following error messages coming up in the Console window very fast:
Exception in thread "JavaFX Application Thread" java.lang.NoClassDefFoundError: com/sun/javafx/tk/Toolkit$$Lambda$166
at com.sun.javafx.tk.Toolkit$$Lambda$166/563347763.get$Lambda(Unknown Source)
at com.sun.javafx.tk.Toolkit.runPulse(Unknown Source)
at com.sun.javafx.tk.Toolkit.firePulse(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit.pulse(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit.lambda$runToolkit$363(Unknown Source)
at com.sun.javafx.tk.quantum.QuantumToolkit$$Lambda$41/353428524.run(Unknown Source)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(Unknown Source)
at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
at com.sun.glass.ui.win.WinApplication.lambda$null$141(Unknown Source)
at com.sun.glass.ui.win.WinApplication$$Lambda$37/1109371569.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
How can I profile a method that gets called from a menu of my JavaFX application?
I have also tried packaging the application into an executable JAR file, so that Eclipse is not involved.
