import java.applet.*;
import java.awt.*;
import java.util.*;

public class SimpleClock extends Applet implements Runnable
{   
	Thread clockThread=null;
	 
	public void start()
	{
		if (clockThread == null)
		{
			clockThread = new Thread(this, "Clock");
			clockThread.start();
		}
	}
	
	public void run()
	{
		while (clockThread != null)
		{
			repaint();
			try{
				clockThread.sleep(1000);
			}catch (InterruptedException e){
			}
		}
	}                     
	
	public void paint(Graphics g)
	{
		GregorianCalendar   date   = new GregorianCalendar();//date對象包含日期和時間信息
           		int year  = date.get( Calendar.YEAR );
           		int month = (date.get( Calendar.MONTH ))+1;
           		int day   = date.get( Calendar.DATE );
           		int hour = date.get( Calendar.HOUR );
           		int minute   = date.get( Calendar.MINUTE );
           		int second   = date.get( Calendar.SECOND );
		g.drawString(year+"/"+month+"/"+day + " " + hour+":"+minute+":"+second, 5, 10);
	}

	public void stop()
	{
		//clockThread.stop();
		clockThread = null;
	} 
}