LWCToolkit.java 文件源码

public static void invokeLater(Runnable event, Component component)
        throws InvocationTargetException {
    final InvocationEvent invocationEvent =
            new InvocationEvent(component != null ? component : Toolkit.getDefaultToolkit(), event);

    if (component != null) {
        final AppContext appContext = SunToolkit.targetToAppContext(component);
        SunToolkit.postEvent(appContext, invocationEvent);

        // 3746956 - flush events from PostEventQueue to prevent them from getting stuck and causing a deadlock
        SunToolkit.flushPendingEvents(appContext);
    } else {
        // This should be the equivalent to EventQueue.invokeAndWait
        ((LWCToolkit)Toolkit.getDefaultToolkit()).getSystemEventQueueForInvokeAndWait().postEvent(invocationEvent);
    }

    final Throwable eventException = invocationEvent.getException();
    if (eventException == null) return;

    if (eventException instanceof UndeclaredThrowableException) {
        throw new InvocationTargetException(((UndeclaredThrowableException)eventException).getUndeclaredThrowable());
    }
    throw new InvocationTargetException(eventException);
}