Name: ktR10099 Date: 03/04/2002


According to specification for method EventQueue.invokeAndWait() "Causes
runnable to have its run() method called in the dispatch thread of the
EventQueue. This will happen after all pending events are processed. The
call blocks until this has happened." Current jdk implementation
demonstrates wrong behavior. PLease find below example, demonstrating the
bug:
------------------------test82.java-------------------------------
import java.awt.*;
import java.awt.event.*;

public class test82 {
    public static void main(String[] args) {
        EventQueue eq = new EventQueue();
        NewActionEvent nae1 = new NewActionEvent(10000);
        NewActionEvent nae2 = new NewActionEvent(5000);
        NewActionEvent nae3 = new NewActionEvent(1000);
        eq.postEvent(nae1);
        eq.postEvent(nae2);
        eq.postEvent(nae3);
        try {
            eq.invokeAndWait(new Runner(-1));
        } catch(Exception e) {
            System.out.println("Unexpected Exception : " + e);
        }
        System.out.println("finished");
    }
}

class NewActionEvent extends InvocationEvent {
    int delay;

    public NewActionEvent(int delay) {
        super(new Object(), new Runner(delay));
        this.delay = delay;
    }

    public synchronized void dispatch() {
        super.dispatch();
        try {
            Thread.sleep(delay);
        } catch(InterruptedException ie) {
        }
        System.out.println("dispatched with delay " + delay);
    }
}

class Runner implements Runnable {
    int delay;

    public Runner(int delay) {
        this.delay = delay;
    }

    public void run() {
        System.out.println("called run() with delay " + delay);
    }
}
---------------------output of test82 under jdk1.4.1-----------------
called run() with delay 10000
called run() with delay -1
finished
dispatched with delay 10000
called run() with delay 5000
dispatched with delay 5000
called run() with delay 1000
dispatched with delay 1000
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