时钟 - java代码库

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import java.awt.BorderLayout; 
import java.awt.Graphics; 
import java.util.Calendar; 
   
import javax.swing.JApplet; 
import javax.swing.JPanel; 
   
public class JApplet_Clock extends JApplet implements Runnable { 
   
    /** 
     *  
     */
    private static final long serialVersionUID = 1L; 
    private JPanel jContentPane=null; 
    private Thread thread=null; 
    private int hour; 
    private int minute; 
    private int second; 
    @Override
    public void start() { 
        // TODO Auto-generated method stub 
        super.start(); 
        if(this.thread==null){ 
            this.thread=new Thread(this); 
            this.thread.start(); 
        } 
    } 
   
    @Override
    public void paint(Graphics arg0) { 
        // TODO Auto-generated method stub 
        super.paint(arg0); 
        int x,y,r=80; 
        arg0.fillOval(94, 94, 12, 12); 
        for(int i=0;i<60;i++){ 
            x=(int) (100+r*Math.sin(Math.PI/30*i)); 
            y=(int) (100-r*Math.cos(Math.PI/30*i)); 
            if(i%5==0){ 
                arg0.fillOval(x-5, y-5, 10, 10); 
            } 
            else{ 
                arg0.fillOval(x-1, y-1, 2, 2); 
            } 
        } 
           
           
    } 
   
 
    @Override
    public void run() { 
        // TODO Auto-generated method stub 
        Graphics g=this.jContentPane.getGraphics(); 
        while(true){ 
            this.play(this.getCodeBase(), "1"); 
            g.setColor(this.jContentPane.getBackground()); 
            drawHMS(g); 
            Calendar c=Calendar.getInstance(); 
            hour=c.get(Calendar.HOUR); 
            minute=c.get(Calendar.MINUTE); 
            second=c.get(Calendar.SECOND); 
               
            //String str; 
            //str=hour+":"+minute+"" 
            g.setColor(this.jContentPane.getForeground()); 
            drawHMS(g); 
            g.fillOval(94, 94, 12, 12); 
            try{ 
                Thread.sleep(1000); 
            }catch(InterruptedException e){ 
                e.printStackTrace(); 
            } 
               
        } 
   
    } 
   
    private void drawHMS(Graphics g) { 
        int x; 
        int y; 
        double cita; 
           
        cita=(hour+minute/60.0+second/3600.0)/12*2*Math.PI; 
        x=(int)(100+55*Math.sin(cita)); 
        y=(int)(100-55*Math.cos(cita)); 
        g.drawLine(100, 100, x, y); 
           
        cita=(hour+minute/60.0)/60.0*2*Math.PI; 
        x=(int)(100+68*Math.sin(cita)); 
        y=(int)(100-68*Math.cos(cita)); 
        g.drawLine(100, 100, x, y); 
           
        cita=second/60.0*2*Math.PI; 
        x=(int)(100+72*Math.sin(cita)); 
        y=(int)(100-72*Math.cos(cita)); 
        g.drawLine(100, 100, x, y); 
    } 
    public JApplet_Clock(){ 
        super(); 
    } 
    public void init(){ 
        this.setSize(300, 200); 
        this.setContentPane(getJContentPane()); 
           
    } 
    private JPanel getJContentPane(){ 
        if(jContentPane==null){ 
            jContentPane=new JPanel(); 
                   
            jContentPane.setLayout(new BorderLayout()); 
        } 
        return jContentPane; 
           
    } 
   
}
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