Bikin Program Stopwatch

Source Code :


import java.awt.event.*;
import java.awt.*;
import javax.swing.*;
    public class Stopwatch extends JFrame implements ActionListener, Runnable
    {
private long startTime;
private final static java.text.SimpleDateFormat timerFormat = new java.text.SimpleDateFormat("mm : ss.SSS");
private final JButton startStopButton= new JButton("Start/stop");
private Thread updater;
private boolean isRunning= false;
private final Runnable displayUpdater= new Runnable()
    {
public void run()
    {
displayElapsedTime(System.currentTimeMillis() - Stopwatch.this.startTime);
    }
};
public void actionPerformed(ActionEvent ae)
    {
    if(isRunning)
    {
long elapsed= System.currentTimeMillis() - startTime;
isRunning= false;
    try
    {
updater.join();
    // Wait for updater to finish
    }
catch(InterruptedException ie) {}
displayElapsedTime(elapsed);
    // Display the end-result
    }
    else
    {
startTime= System.currentTimeMillis();
isRunning= true;
updater= new Thread(this);
updater.start();
    }
    }
    private void displayElapsedTime(long elapsedTime)
    {
startStopButton.setText(timerFormat.format(new java.util.Date(elapsedTime)));
    }
public void run()
    {
try

    {
while(isRunning)
    {
SwingUtilities.invokeAndWait(displayUpdater);
Thread.sleep(50);
    }
    }
catch(java.lang.reflect.InvocationTargetException ite)
    {
ite.printStackTrace(System.err);
    // Should never happen!
    }
catch(InterruptedException ie) {}
    // Ignore and return!
    }
public Stopwatch()
    {
    startStopButton.addActionListener(this);
    getContentPane().add(startStopButton);
    setSize(300,100);
    setVisible(true);
    }
public static void main(String[] arg)
    {
new Stopwatch().addWindowListener(new WindowAdapter()
    {
public void windowClosing(WindowEvent e)
    {
System.exit(0);
}
    });
  }
}

Outputnya :

Silahkan Copas Gannnn,,,,

Tapi Tolong Jangan Lupa Komentarnya yy gann,,,

Posted in: Java