Digital Clock ( 梶野作 )

( ソース )

import java.awt.Graphics;
import java.awt.Color;
import java.awt.Font;
import java.awt.Component;
import java.awt.FontMetrics;
import java.util.Date;

public class digitalclock extends java.applet.Applet implements Runnable{

	Thread runner;
	Font theFont = new Font("TimesRoman", Font.BOLD+Font.ITALIC, 32);
	Date theDate;
	
	public void start(){
		if(runner == null){
			runner = new Thread(this);
			runner.start();
		}
	}

	public void stop(){
		if(runner != null){
			runner.stop();
			runner = null;
		}
	}

	public void run(){
		while(true){
			theDate = new Date();
			repaint();
			try{
				Thread.sleep(1000);
			}
			catch (InterruptedException e){
			}
		}
	}

	public void paint(Graphics g){
		FontMetrics fm = getFontMetrics(theFont);
		setBackground(Color.black);
		g.setColor(Color.white);
		g.setFont(theFont);
		int xstart = (this.size().width - fm.stringWidth(theDate.toString())) / 2;
		int ystart = (this.size().height + fm.getAscent()) / 2;
		g.drawString(theDate.toString(), xstart, ystart);
	}
}