Problem
-------

java.awt.Scrollbar.setValue() and java.awt.Scrollbar.setValues() fail to
generate an java.awt.event.AdjustmentEvent.

It is expected that such method calls should propagate a:

java.awt.event.AdjustmentEvent

Code Example
------------

import java.awt.*;
import java.awt.event.*;

public class ScrollbarTest {
    static boolean flag = true;

    public static void main(String argv[]) {

        final Frame f = new Frame();
        final Panel p = new Panel();
        final Scrollbar s = new Scrollbar(Scrollbar.VERTICAL);
        final Button b1 = new Button("setValues() - plural");
        final Button b2 = new Button("setValue() - singular");
        final Button b3 = new Button("hide/show");
        final Button b4 = new Button("reset");
        final TextArea ta = new TextArea("Adjustment Events \n",
15,2,TextArea.SCROLLBARS_VERTICAL_ONLY);

        s.addAdjustmentListener(new AdjustmentListener() {public void
adjustmentValueChanged(AdjustmentEvent ae){
                System.out.println(ae);
                ta.append(ae.toString()+"\n");
        }});

// setValues()
//
        b1.addActionListener(new ActionListener(){public void
actionPerformed(ActionEvent ae){
                for (int i = 0; i <10; i++)
s.setValues(i,i,i,i);
        }});

// setValue()
//
        b2.addActionListener(new ActionListener(){public void
actionPerformed(ActionEvent ae){
                    s.setValue(5);
        }});

        b3.addActionListener(new ActionListener(){public void
actionPerformed(ActionEvent ae){
                s.setVisible(getFlag());
        }});

        b4.addActionListener(new ActionListener(){public void
actionPerformed(ActionEvent ae){
                s.setValues(5,3,1,10);
        }});


        f.setLayout(new BorderLayout());
        p.add(b1);
        p.add(b2);
        p.add(b3);
        p.add(b4);
        f.add(p, BorderLayout.CENTER);
        f.add(s, BorderLayout.EAST);
        f.add(ta, BorderLayout.SOUTH);
        f.setSize(750,400);
        f.setVisible(true);

    }

    static boolean getFlag(){
            flag = !flag;
            return flag;
    }
}



To Reproduce
------------

Install Solaris 7 / SPARC.

Obtain JDK 1.1.7B:

java -version
java version "1.1.7B"

Sometimes known as:

java -fullversion
java full version "JDK1.1.7U"

(Why I don't know :-)

Compile the above code.

javac ScrollbarTest

Run:
java ScrollbarTest


Observe:

No AdjustmentEvents are observed when programmatically
setValue()/setValues().

The failure is also demonstrable using:

java full version "JDK1.1.6N"

a previous "reference" JDK.