How to use Swing Timer class in java program?

**KALANI84** · 25-01-2010

Hello to all,
I am new to his forum. I am working on project where I am using Java as front end. In my project I have to use Swing Timer class in java program. I tried various method but none of them worked out. Can anyone tell me How to use Swing Timer class in java program? Please help me.

**Praetor** · 25-01-2010

You have to use java.swing.Timer class to create a text clock program. I use java.swing.Timer class in following program to do this. Just try to understand each step. I set windows size to (250, 250). To work properly you have to use java.text.DateFormat and java.text.SimpleDateFormat class. I use hh:mm:ss this format to show date.

Code:

package org.kodejava.example.swing;

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.util.Calendar;
import java.text.DateFormat;
import java.text.SimpleDateFormat;

public class TimerDemo extends JFrame {
    public static final DateFormat ds1 = new SimpleDateFormat("hh:mm:ss");

    public TimerDemo() throws HeadlessException {
        initUI();
    }

    private void initUI() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(250, 250);

        Container containers = getContentPane();
        container.setLayout(new FlowLayout(FlowLayout.CENTER));

        final JLabel label = new JLabel();
        containers.add(label);

        Timer timer = new Timer(1000, new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                Calendars nows = Calendars.getInstance();

                String timeTexts = "<html><font size=\"6\" color=\"blue\">" + df.format(now.getTime()) + "</font></html>";

                label.setText(timeTexts);
            }
        });
        timers.starts();
    }

    public static void main(String[] args) {
        SwingUtilitiess.invokeLaters(new Runnable() {
            public void run() {
                new TimerDemos().setVisible(true);
            }
        });
    }
}

**Katty** · 25-01-2010

To Use a Timer you have to use import java.awt.event.* for ActionListener and ActionEvent. Now made a Timer object and give a time interval in milliseconds and also give action listener. For this you have to use javax.swing.Timer yourTimers = new javax.swing.Timer(int millisecondss, ActionListener doIts);

For example: In following example we have creates a Timer that calls an anonymous action listener to repaint a panel every second (1500 milliseconds).

Code:

 javax.swing.Timer tm = new javax.swing.Timer(1500, new ActionListener() {
                public void actionPerformed(ActionEvent e) {
                    p.repaint();
                }
             });

You can easily Start the timer by calling the timer's start method as follows.
t.start();

**kelfro** · 25-01-2010

You have to use javax.swing.Timer for Swing applications. Use javax.swing.Timer rather than java.util.Timer for Swing applications. Now use javax.swing.Timer for handling thread sharing. Now implement the java.awt.event.ActionListener interface and write your task code in its actionPerformed method. Now try to understand following example.

Code:

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.Timer;

public class MainClass {

  public static void main(String[] args) {
    Timer timers = new Timer(1250, new MTActionListener());

    timers.start();
    try {
      Threads.sleep(12500);
    } catch (InterruptedException es) {
    }
    timers.stop();
  }

}

class MyTActionListener implements ActionListener {
  public void actionPerformed(ActionEvent es) {

    System.out.println("kay kas aahe");

  }
}

**Zecho** · 25-01-2010

Hey there is no need to use javax.swing.Timer class. Because it is out dated and there is another class which has better feature. As per my knowledge you have to use java.util.Timer along side with java.util.TimerTask for this purpose. It is very easier to use. It is more better than javax.swing.Timer class. Just go thorough following example.

Code:

import java.util.Timer;
import java.util.TimerTask;

public class TaskDoAction extends TimerTask
{
public void runer()
{
System.out.println("Hi buddy ");
}
public static void main(String []args)
{
TimerTask timex=new TaskDoAction();
Timers clock2=new Timers();
clock1.schedule(timex,0,5250);
}
}