Re: How to Refresh the System Resources Data like amount of Free Memory.

Knute Johnson <>
Tue, 02 May 2006 10:20:10 -0700
vijju wrote:

I am Pretty New to java swing.
I am displaying the Runtime.getSystemResource().FreeMemory Information
in the textField.
I want this information To Refresh every 10 seconds.
I don't know ,how to use Javax.swing.Timer class .
Please Help me out with this Problem.

Thanking You,

Here is a simple example of using javax.swing.Timer to update a JLabel.

package com.knutejohnson.components;

import java.awt.*;
import java.awt.event.*;
import java.text.*;
import java.util.*;
import javax.swing.*;

public class JTimeLabel extends JLabel implements ActionListener {
     private SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
     private javax.swing.Timer timer = new javax.swing.Timer(250,this);

     public JTimeLabel() {

     public JTimeLabel(String text) {

     public JTimeLabel(String text, int horizontalAlignment) {

     public JTimeLabel(String text, int horizontalAlignment, String
pattern) {
         super(text, horizontalAlignment);
         this.sdf = new SimpleDateFormat(pattern);

     public void actionPerformed(ActionEvent ae) {
         setText(sdf.format(new Date()));

     public static void main(String[] args) {
         JFrame f = new JFrame();
         f.add(new JTimeLabel("24:00:00",JLabel.CENTER));


Knute Johnson
email s/nospam/knute/

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