EventQueue has a method called push() that will do exactly what you want. Here is a little demo:
public class QueueTest {
public static void main(String[] args) throws InterruptedException, InvocationTargetException {
EventQueue eventQueue = Toolkit.getDefaultToolkit().getSystemEventQueue();
eventQueue.push(new MyEventQueue());
EventQueue.invokeAndWait(new Runnable() {
public void run() {
System.out.println("Run");
}
});
}
private static class MyEventQueue extends EventQueue {
public void postEvent(AWTEvent theEvent) {
System.out.println("Event Posted");
super.postEvent(theEvent);
}
}
}