FULL PRODUCT VERSION :
jp_1.4.2.11, 1.5.0_07

ADDITIONAL OS VERSION INFORMATION :
windows 2000, windows 98, windows xp, linux debian sarge

A DESCRIPTION OF THE PROBLEM :
it is a problem that happens on the virtual machines after the version 1.4.1. When you click over a JcomboBox and inside the event you call the method removeallItems(); it creates a new actionEvent that is carried by the listener of the component, that shouldn´t happen cause I am just using a method, that doesn´t happen on the version 1.4.1 of the JVM

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :

I made an example showing the bug of the newer JVM's, I suggest you that you
try the example on the JVM 1.4.1 and then in the new ones. I include the
whole example which is based on the java archives. The class that holds the main method is Application1.java put the archives on the same folder named test_combo;
Compile both archives to create the Application1.class and the Frame1.class
and then run it.

EXPECTED VERSUS ACTUAL BEHAVIOR :
EXPECTED -
The idea is when you call the method jComboBox1.RemoveAllIItems(); nothing
else should happen but just remove all items from the combo box, my program
was developed using the jvm 1.4.1 and it worked correclty. I made updates on my JVM and my program didn't work correctly anymore. On the new JVM when you call the method jComboBox1.RemoveAllIItems(); creates an additional action that is carried by the ActionListener of the ComoBox and that is not a correct behavior


REPRODUCIBILITY :
This bug can be reproduced always.

---------- BEGIN SOURCE ----------

Application1.java and Frame1.java
//////Application1.java
package test_combo;
import javax.swing.UIManager;
import java.awt.*;
public class Application1 {
  boolean packFrame = false;
  public Application1() {
    Frame1 frame = new Frame1();
   if (packFrame) {
      frame.pack();
    }
    else {
      frame.validate();
    }
      Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();
    Dimension frameSize = frame.getSize();
    if (frameSize.height > screenSize.height) {
      frameSize.height = screenSize.height;
    }
    if (frameSize.width > screenSize.width) {
      frameSize.width = screenSize.width;
    }
    frame.setLocation((screenSize.width - frameSize.width) / 2,
(screenSize.height - frameSize.height) / 2);
    frame.setVisible(true);
  }
  public static void main(String[] args) {
    try {
      UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
    }
    catch(Exception e) {
      e.printStackTrace();
    }
    new Application1();
  }
}
////Frame1.java
package test_combo;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Frame1 extends JFrame {
  JPanel contentPane;
  JComboBox jComboBox1 = new JComboBox();
  FlowLayout flowLayout1 = new FlowLayout();
  JLabel jLabel1 = new JLabel();
  JLabel veces = new JLabel();
  JButton jButton1 = new JButton();
   static int count=-1;
  JTextArea jTextArea1 = new JTextArea();
  JTextField jTextField1 = new JTextField();
  //Construct the frame
  public Frame1() {
    enableEvents(AWTEvent.WINDOW_EVENT_MASK);
    try {
      jbInit();
    }
    catch(Exception e) {
      e.printStackTrace();
    }
  }
  //Component initialization
  private void jbInit() throws Exception {
    contentPane = (JPanel) this.getContentPane();
    contentPane.setLayout(flowLayout1);
    this.setSize(new Dimension(452, 150));
    this.setTitle("Test combo");
    jComboBox1.addActionListener(new Frame1_jComboBox1_actionAdapter(this));
    jLabel1.setText("went action Listener:");
    veces.setRequestFocusEnabled(true);
    veces.setText("0");
    jButton1.setText("RemoveAllItems()");
    jButton1.addActionListener(new Frame1_jButton1_actionAdapter(this));
    //jLabel2.setText("");
    jTextArea1.setText("JVM 1.4.1 works correctly it doesn\'t go to the
action Listener");
    jTextField1.setText("On newer versions of JVM work incorrectly cause
creates an action");
    contentPane.add(jComboBox1, null);
    contentPane.add(jButton1, null);
    contentPane.add(jLabel1, null);
    contentPane.add(veces, null);
    contentPane.add(jTextArea1, null);
    contentPane.add(jTextField1, null);
    for(int i=0;i<10;i++)
      this.jComboBox1.addItem(""+(i+1));
  }
  protected void processWindowEvent(WindowEvent e) {
    super.processWindowEvent(e);
    if (e.getID() == WindowEvent.WINDOW_CLOSING) {
      System.exit(0);
    }
  }
  void jComboBox1_actionPerformed(ActionEvent e) {
      count++;
      veces.setText(""+count);
  }
  void jButton1_actionPerformed(ActionEvent e) {
    this.jComboBox1.removeAllItems(); ///calling just the function
  }
}
class Frame1_jComboBox1_actionAdapter implements
java.awt.event.ActionListener {
  Frame1 adaptee;

  Frame1_jComboBox1_actionAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jComboBox1_actionPerformed(e);
  }
}
class Frame1_jButton1_actionAdapter implements java.awt.event.ActionListener
{
  Frame1 adaptee;

  Frame1_jButton1_actionAdapter(Frame1 adaptee) {
    this.adaptee = adaptee;
  }
  public void actionPerformed(ActionEvent e) {
    adaptee.jButton1_actionPerformed(e);
  }
}
---------- END SOURCE ----------