FULL PRODUCT VERSION :
java version "1.4.2_08"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.2_08-b03)
Java HotSpot(TM) Client VM (build 1.4.2_08-b03, mixed mode)


ADDITIONAL OS VERSION INFORMATION :
linux 2.6.10, mostly redhat distribution

A DESCRIPTION OF THE PROBLEM :
There appears to be a race condition on when the setState() takes effect. On linux, the mouse selection, or the user's setState randomly wins.


STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
run program. Click on a box. That row should all be enabled. Including the box that was clicked/checked.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
every box in the row should be checked.

this appears to work on a Win 2000 system. I was in reality trying to replicate a different anomaly between linux & windows, but found this so far.
ACTUAL -
for all the boxe in that row that was not checked that are enabled ( which is what i expect ). The box in the row that was selected sometimes (most-times ) does not show selected.

REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------
/*
 * WhatsInAChoiceBox.java
 *
 * Created on July 9, 2005, 7:23 AM
 */

/**
 *
 * @author gat
 */

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

public class WhatsInAChoiceBox extends java.awt.Frame {


    /** Creates new form WhatsInAChoiceBox */
    java.awt.event.MouseAdapter mouseClickListener =
        new java.awt.event.MouseAdapter() {
            public void mouseClicked(MouseEvent evt) {
                cbClicked(evt);
        }
    };
   public WhatsInAChoiceBox() {
        initComponents();
        setupCBarray();
        int i ;
        for ( i = 0; i < cb.length; i++ )
            cb[i].addMouseListener( mouseClickListener );
   }

    /** This method is called from within the constructor to
     * initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is
     * always regenerated by the Form Editor.
     */
    private void initComponents() {//GEN-BEGIN:initComponents
        panel1 = new java.awt.Panel();
        checkbox1 = new java.awt.Checkbox();
        checkbox2 = new java.awt.Checkbox();
        checkbox3 = new java.awt.Checkbox();
       checkbox4 = new java.awt.Checkbox();
        checkbox5 = new java.awt.Checkbox();
        checkbox6 = new java.awt.Checkbox();
        checkbox7 = new java.awt.Checkbox();
        checkbox8 = new java.awt.Checkbox();
        checkbox9 = new java.awt.Checkbox();
        checkbox10 = new java.awt.Checkbox();
        checkbox11 = new java.awt.Checkbox();
        checkbox12 = new java.awt.Checkbox();
        checkbox13 = new java.awt.Checkbox();
        checkbox14 = new java.awt.Checkbox();
        checkbox15 = new java.awt.Checkbox();
        checkbox16 = new java.awt.Checkbox();

        setLayout(new java.awt.FlowLayout());

        addWindowListener(new java.awt.event.WindowAdapter() {
            public void windowClosing(java.awt.event.WindowEvent evt) {
                exitForm(evt);
            }
        });

        panel1.setLayout(new java.awt.GridLayout(4, 4, 5, 5));

        panel1.setBackground(new java.awt.Color(255, 255, 51));
        panel1.setName("cbPanel");
        checkbox1.setLabel("checkbox1");
        panel1.add(checkbox1);

        checkbox2.setLabel("checkbox2");
        panel1.add(checkbox2);

        checkbox3.setLabel("checkbox3");
        panel1.add(checkbox3);

        checkbox4.setLabel("checkbox4");
        panel1.add(checkbox4);

        checkbox5.setLabel("checkbox5");
        panel1.add(checkbox5);

       checkbox6.setLabel("checkbox6");
        panel1.add(checkbox6);

        checkbox7.setLabel("checkbox7");
        panel1.add(checkbox7);

        checkbox8.setLabel("checkbox8");
        panel1.add(checkbox8);

        checkbox9.setLabel("checkbox9");
        panel1.add(checkbox9);

        checkbox10.setLabel("checkbox10");
        panel1.add(checkbox10);

        checkbox11.setLabel("checkbox11");
        panel1.add(checkbox11);

        checkbox12.setLabel("checkbox12");
        panel1.add(checkbox12);

        checkbox13.setLabel("checkbox13");
        panel1.add(checkbox13);

        checkbox14.setLabel("checkbox14");
        panel1.add(checkbox14);

        checkbox15.setLabel("checkbox15");
        panel1.add(checkbox15);

        checkbox16.setLabel("checkbox16");
        panel1.add(checkbox16);

        add(panel1);

        pack();
    }//GEN-END:initComponents

    /** Exit the Application */
    private void exitForm(java.awt.event.WindowEvent evt) {//GEN-FIRST:event_exitForm
        System.exit(0);
    }//GEN-LAST:event_exitForm

    public void
    cbClicked( MouseEvent evt ) {
        Checkbox selected = (Checkbox) evt.getSource();
        int i;
        for ( i = 0; i < cb.length; i++ ) {
            if ( cb[i] == selected )
                break;
        }
        if ( i >= cb.length ) {
            System.out.println( "Confused: checkbox does not belong to me!");
            return;
        }

        for ( int k = 0; k < cb.length; k++)
            cb[k].setState( false ); // everybody off
        int start = (i/4) * 4;
        for ( int k = start; k < start+4; k++ ) {
            //if ( k != i)
            { // Race condition
                System.out.println("Setting "+cb[k].getLabel() + " to true");
                cb[k].setState( true );
            }
        }

    }


    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        new WhatsInAChoiceBox().show();
    }


    // Variables declaration - do not modify//GEN-BEGIN:variables
    private java.awt.Checkbox checkbox1;
    private java.awt.Checkbox checkbox10;
    private java.awt.Checkbox checkbox11;
    private java.awt.Checkbox checkbox12;
    private java.awt.Checkbox checkbox13;
    private java.awt.Checkbox checkbox14;
    private java.awt.Checkbox checkbox15;
    private java.awt.Checkbox checkbox16;
    private java.awt.Checkbox checkbox2;
    private java.awt.Checkbox checkbox3;
    private java.awt.Checkbox checkbox4;
    private java.awt.Checkbox checkbox5;
    private java.awt.Checkbox checkbox6;
    private java.awt.Checkbox checkbox7;
    private java.awt.Checkbox checkbox8;
    private java.awt.Checkbox checkbox9;
    private java.awt.Panel panel1;
    // End of variables declaration//GEN-END:variables

    Checkbox[] cb = {
        checkbox1, checkbox2, checkbox3, checkbox4, checkbox5, checkbox6, checkbox7, checkbox8,
        checkbox9, checkbox10, checkbox11, checkbox12, checkbox13, checkbox14, checkbox15, checkbox16
    };

    void setupCBarray() {
        cb[ 0] = checkbox1; cb[ 1] = checkbox2; cb[ 2] = checkbox3; cb[ 3] = checkbox4;
        cb[ 4] = checkbox5; cb[ 5] = checkbox6; cb[ 6] = checkbox7; cb[ 7] = checkbox8;
        cb[ 8] = checkbox9; cb[ 9] = checkbox10; cb[10] = checkbox11; cb[11] = checkbox12;
        cb[12] = checkbox13; cb[13] = checkbox14; cb[14] = checkbox15; cb[15] = checkbox16;
    }
}


---------- END SOURCE ----------

CUSTOMER SUBMITTED WORKAROUND :
if you dont setState the box ( "//if ( k != i)" )that caused the checkbox event, on linux, then this appears to work most of the time.
On windows, this workaround does not work.
###@###.### 2005-07-21 06:32:48 GMT