java实现机械表

package thread;  import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import javax.swing.*; import java.util.Date; import java.awt.*;   class T extends JFrame implements Runnable {     Thread t2 =new Thread();      	public void run()  	{   		t2.start(); 		 		Frame f=new Frame("机械表");        f.setSize(600,300);        f.setLocation(300,300);         f.setVisible(true); 	           f.add(new Paint());                 f.addWindowListener         (new WindowAdapter() {         public void windowClosing(WindowEvent e) {         f.dispose();         }  } );         //关闭窗口                     		while(t2!=null) 		{ 			f.repaint(); 			try { 				Thread.sleep(1000); 			} catch (InterruptedException e) { 				// TODO Auto-generated catch block 				e.printStackTrace(); 			} 		} 	} } class Paint extends JPanel { 	  	  	  	public void paint (Graphics g) 	{   		int radius,ybase,xbase;  	    Date date=new Date(); 	    int hour=date.getHours();      	int minute=date.getMinutes(); 	    int s=date.getSeconds();  		radius=ybase=xbase=150/2;	 		g.drawOval(10, 10, 150, 150);  		for (int i = 1; i <= 12; i++) { 			g.drawString(new String(i+""), (int)(10+xbase+Math.sin(Math.PI/6*i)*radius), (int)(10+ybase-Math.cos(Math.PI/6*i)*radius)); 		} 		 		 		/* 		 * 圆心坐标：(x0,y0)  半径：r  角度：a   圆周率： PI   则圆上任一点为：（x1,y1）  x1   =   x0   +   r   *   cos(a   *   PI   /180   )  y1   =   y0   +   r   *   sin(a   *   PI  /180   )  		 */ 	 	 		g.setColor(Color.blue); 		g.drawLine(xbase+10, ybase+10, (int)(10+xbase+(Math.cos((s*Math.PI/30)-Math.PI/2)*radius)), (int)(10+ybase+(Math.sin((s*Math.PI/30-Math.PI/2))*radius))); 		 		g.setColor(Color.green); 		g.drawLine(xbase+10, ybase+10, (int)(10+xbase+(Math.cos((minute*Math.PI/30-Math.PI/2))*radius)), (int)(10+ybase+(Math.sin((minute*Math.PI/30-Math.PI/2))*radius)));  		g.setColor(Color.red); 		g.drawLine(xbase+10, ybase+10, (int)(10+xbase+(Math.cos((hour*Math.PI/6-Math.PI/2))*radius)), (int)(10+ybase+((Math.sin(hour*Math.PI/6-Math.PI/2))*radius))); 		 		 g.setFont(new Font("宋体", Font.BOLD,20)); 		 g.setColor(Color.black); 		  	     g.drawString(date.getHours()+":"+date.getMinutes()+":"+date.getSeconds(),200,100); 	     g.drawString("北京时间",200,50); 		 	} 	      }  public  class time { 	public static void main(String args[]) 	{             T t1=new T(); 	        t1.run();       	} 	 } 

运行图