Platform.exit() 没有结束 Javafx，因为 OSX 中的其他线程

Question

我有一个javafx 8应用程序，当我想关闭它时，它有多个活动线程，此代码显示 8 个活动线程：

    ThreadGroup group = Thread.currentThread().getThreadGroup();
    LOG.debug("Number of active threads  = " + group.activeCount());

使用Platform.exit();和Platform.setImplicitExit(true);并不能让我干净地退出。

我尝试在调用Platform.exit();之前或之后杀死所有线程，但没有成功。

甚至在中断之前将线程设置为恶魔也无法解决。

        while (group != null) {
        group.setDaemon(true);
        group.interrupt();
        group = Thread.currentThread().getThreadGroup();
    }

调用System.exit(0)在这里不是一个选项，因为其他应用程序可以从其他应用程序内部启动或独立启动。

退出前显示的错误为 Not on FX application thread; currentThread = JavaFX Application Thread 。

编辑1：错误的堆栈跟踪：

    ERROR SimpleUncaughtExceptionHandler.java uncaughtException 34     [JavaFX Application Thread] Uncaught exception
java.lang.IllegalStateException: Not on FX application thread; currentThread = JavaFX Application Thread
    at com.sun.javafx.tk.Toolkit.checkFxUserThread(Toolkit.java:236) ~[jfxrt.jar:?]
    at com.sun.javafx.tk.quantum.QuantumToolkit.checkFxUserThread(QuantumToolkit.java:423) ~[jfxrt.jar:?]
    at javafx.stage.Window.setShowing(Window.java:921) ~[jfxrt.jar:?]
    at javafx.stage.Window.hide(Window.java:947) ~[jfxrt.jar:?]
    at com.sun.javafx.stage.WindowPeerListener.closed(WindowPeerListener.java:100) ~[jfxrt.jar:?]
    at com.sun.javafx.tk.quantum.GlassWindowEventHandler.run(GlassWindowEventHandler.java:118) ~[jfxrt.jar:?]
    at com.sun.javafx.tk.quantum.GlassWindowEventHandler.run(GlassWindowEventHandler.java:40) ~[jfxrt.jar:?]
    at java.security.AccessController.doPrivileged(Native Method) ~[?:1.8.0_121]
    at com.sun.javafx.tk.quantum.GlassWindowEventHandler.lambda$handleWindowEvent$423(GlassWindowEventHandler.java:150) ~[jfxrt.jar:?]
    at com.sun.javafx.tk.quantum.QuantumToolkit.runWithoutRenderLock(QuantumToolkit.java:389) ~[jfxrt.jar:?]
    at com.sun.javafx.tk.quantum.GlassWindowEventHandler.handleWindowEvent(GlassWindowEventHandler.java:148) ~[jfxrt.jar:?]
    at com.sun.glass.ui.Window.handleWindowEvent(Window.java:1266) ~[jfxrt.jar:?]
    at com.sun.glass.ui.Window.notifyDestroy(Window.java:1183) ~[jfxrt.jar:?]

编辑 2：活动线程列表：

DEBUG [JavaFX Application Thread]        isDeamon : false; name : main
DEBUG [JavaFX Application Thread]        isDeamon : true; name : QuantumRenderer-0
DEBUG [JavaFX Application Thread]        isDeamon : false; name : JavaFX-Launcher
DEBUG [JavaFX Application Thread]        isDeamon : true; name : URL-Loader-2
DEBUG [JavaFX Application Thread]        isDeamon : true; name : URL-Loader-1
DEBUG [JavaFX Application Thread]        isDeamon : true; name : JavaFX Application Thread
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Java2D Queue Flusher
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Prism Font Disposer
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Reference Handler
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Thread-6
DEBUG [JavaFX Application Thread]        isDeamon : false; name : AWT-Shutdown
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Java2D Disposer
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Signal Dispatcher
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Disposer
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Finalizer
DEBUG [JavaFX Application Thread]        isDeamon : false; name : AWT-EventQueue-0
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Thread-5
DEBUG [JavaFX Application Thread]        isDeamon : true; name : Timer-0

Answer 1

此问题和OSX系统菜单栏在JavaFX中不起作用的根本原因相同，即我正在使用的启动画面" java -splash:.. "，禁用它可以解决问题。

由于初始屏幕是一个AWT功能而不是JavaFX功能，它似乎是在AWT事件线程而不是JavaFX事件线程中启动的。

看起来JavaFX中的splash screen应该作为JavaFX Pane从应用程序内部实现。