Java 1.4.2 swing (setBounds) performance problem

Question

Hi,
We were having performance problems with swing ever since we moved to java 1.4.2 and we finally switched back to 1.4.1. However, we have now traced the problem to JVM and the following simple code demonstrates it.
I would like to hear from others who faced or solved this.
When the setBounds is called, there is visible delay in checking/unchecking boxes.
Without it, the performance is good. The performance is good with 1.4.1 as well.
Code sample for JComponentTest :
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import javax.swing.JButton;
import javax.swing.JCheckBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
public class JComponentTest extends JFrame {
public final static int MAX_JLBL = 50;
private static double _clicked = 0.0;
// pop up window
private JPanel _configPanel = new JPanel();
private JCheckBox[] _configArray = new JCheckBox[MAX_JLBL];
private JButton _toggle = new JButton("update");
public JComponentTest() {
setTitle("JLabelTest");
// setBounds causes performance problems
setBounds(1278, 4, 203, 361);
getContentPane().add(_configPanel);
for(int i=0; i<_configArray.length; i++){
_configArray[i] = new JCheckBox("cb"+i);
configPanel.add(configArray);
_configArray[i].addActionListener(new ConfigListener());
configPanel.add(toggle);
_toggle.addActionListener(new ConfigListener());
setVisible(true);
// listenres
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(1);
} // end constructor
public static void main(String[] args) {
new JComponentTest();
/** This class implements the ActionListener and being used for configuration
* fields.
private class ConfigListener implements ActionListener {
public void actionPerformed(ActionEvent ae) {
boolean selected = (_clicked%2 ==0);
if (selected)
for(int i=0; i<_configArray.length; i++)
((JCheckBox)_configArray[i]).setSelected(true);
else
for(int i=0; i<_configArray.length; i++)
((JCheckBox)_configArray[i]).setSelected(false);
_clicked++;

Answer 1

weebib
We are using Windows XP , Nvidia graphics card, with Multiview. I hope the problem is not specific to the platform.
It is reproducible with 1.4.2 and absent in 1.4.1
camickr
I am new to this forum. didn't know about code blocks.