EventLock.java 文件源码

/**
 * Similar to {@link EventQueue#invokeAndWait} but posts the event at the same
 * priority as paint requests, to avoid bad visual artifacts.
 */
static void invokeAndWaitLowPriority(RWLock m, Runnable r)
        throws InterruptedException, InvocationTargetException {
    Toolkit t = Toolkit.getDefaultToolkit();
    EventQueue q = t.getSystemEventQueue();
    Object lock = new PaintPriorityEventLock();
    InvocationEvent ev = new PaintPriorityEvent(m, t, r, lock, true);
    synchronized (lock) {
        q.postEvent(ev);
        lock.wait();
    }
    Exception e = ev.getException();
    if (e != null) {
        throw new InvocationTargetException(e);
    }
}