在 setVisible(true) 上,我调用以下代码来启动模式对话框:
private synchronized void startModal () {
try {
if (SwingUtilities.isEventDispatchThread()) {
EventQueue theQueue = getToolkit().getSystemEventQueue();
while (isVisible()) {
AWTEvent event = theQueue.getNextEvent();
Object source = event.getSource();
if (event instanceof ActiveEvent) {
((ActiveEvent) event).dispatch();
} else if (source instanceof Component) {
((Component) source).dispatchEvent(event);
} else if (source instanceof MenuComponent) {
((MenuComponent) source).dispatchEvent(event);
} else {
System.err.println("Unable to dispatch: " + event);
}
}
} else {
while (isVisible()) {
wait();
}
}
} catch (InterruptedException ignored) { }
}
这在大多数浏览器中都非常有效。但是,在 Windows 的 Opera 和 Safari 中,我遇到了以下严重的异常:
java.security.AccessControlException: access denied (java.awt.AWTPermission accessEventQueue)
at java.security.AccessControlContext.checkPermission(Unknown Source)
at java.security.AccessController.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkPermission(Unknown Source)
at java.lang.SecurityManager.checkAwtEventQueueAccess(Unknown Source)
at java.awt.Toolkit.getSystemEventQueue(Unknown Source)
是否有在这些浏览器中生成假模态对话框的解决方法?