Name: mgC56079 Date: 04/24/98



Javadoc says:

    /**
     * Stop dispatching events using this EventQueue instance.
     * Any pending events are transferred to the previous
     * EventQueue for processing by it. If called from the
     * initial EventQueue for this AWTContext, an
     * EmptyStackException is thrown.
     */
    protected synchronized void pop() throws EmptyStackException
        synchronized (newEventQueue) {
            newEventQueue.queue = queue; // may be null
            newEventQueue.prev = this;
            next = newEventQueue;
        }
    }


---- Here is the test ----
import java.util.EmptyStackException;
import java.awt.*;

public class EventQueueTest {
  public static void main(String[] args) {
    NewEventQueue q=new NewEventQueue();
    try {
      q.pop();
    }
    catch (EmptyStackException e) {
      System.out.println("passed");
    }
    System.out.println("EmptyStackException expected");
  }

}

class NewEventQueue extends EventQueue {
  public void pop() throws EmptyStackException {
    super.pop();
  }

}
---- Sample run ----
% java EventQueueTest
java.lang.NullPointerException
at java.awt.EventQueue.pop(EventQueue.java:198)
at NewEventQueue.pop(EventQueueTest.java:20)
at EventQueueTest.main(EventQueueTest.java:8)


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