Java写的创意时钟，纯属好玩，没任何实用价值的说～

import javax.swing.*;
import java.util.*;
import java.awt.*;
 
public class ClockPanel {
 
	/**
	 * @param args
	 */
	JFrame frame;
	Canvas ab;
	Clock kk;
	int hh, mm, ss;
	Calendar cal = null;
 
	ClockPanel() {
		frame = new JFrame("Clock");
		frame.setBackground(Color.white);
		ab = new Canvas();
		ab.setSize(400, 400);
		ab.setBackground(Color.red);
		frame.setSize(400, 400);
		frame.add(ab);
		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		frame.setVisible(true);
		kk = new Clock(this);
		begin();
	}
 
	/**
	 * 画图函数，就是很简单的用Calendar类获得当前时间，然后弧形
	 */
	void draw() {
		Graphics g = ab.getGraphics();
		g.setColor(Color.red);
		g.fillRect(0, 0, 400, 400);
		g.setColor(Color.green);
		cal = Calendar.getInstance();
		hh = cal.get(Calendar.HOUR_OF_DAY);
		mm = cal.get(Calendar.MINUTE);
		ss = cal.get(Calendar.SECOND);
		g.drawString("Nowtime:" + hh + ":" + mm + ":" + ss, 40, 60);
		int ars = 6 * ss;
		int arm = 6 * mm;
		int arh = 360 / 24 * hh;
		g.fillArc(100, 100, 200, 200, 90, -ars);
		g.setColor(Color.blue);
		g.fillArc(130, 130, 140, 140, 90, -arm);
		g.setColor(Color.magenta);
		g.fillArc(150, 150, 80, 80, 90, -arh);
	}
 
	void begin() {
		(new Thread(kk)).start();// 线程启动！
	}
 
	public static void main(String[] args) {
		ClockPanel a = new ClockPanel();
	}
 
}
 
/**
 * 这个是用来控制画图的线程，每秒刷新
 * 
 * @author yanglingfeng
 * 
 */
class Clock implements Runnable {
	ClockPanel a = null;
 
	Clock(ClockPanel in) {
		a = in;
		a.draw();
	}
 
	@Override
	public void run() {
		while (true) {
			try {
				a.draw();
				Thread.sleep(1000);// 1秒刷新
			} catch (InterruptedException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
 
		}
	}
 
}