havethreadframe.java

自己拿来玩的一个球体旋转效果

 旋转的行星 
import java.awt.*; 
import java.awt.event.*; 
class Mycanvas extends Canvas  
{   int r; 
   Color c; 
   public void setColor(Color c) 
   {   this.c=c; 
   } 
   public void setR(int r) 
   {   this.r=r; 
   } 
   public void paint(Graphics g) 
   {   g.setColor(c); 
      g.fillOval(0,0,2*r,2*r); 
   } 
   public int getR() 
   {   return r; 
   } 
} 
class Planet extends Panel implements Runnable 
{   Thread moon;//用Thread类声明一个moon对象 
   Mycanvas yellowBall;  
   double    pointX[]=new double[360],  
         pointY[]=new double[360];    //用来表示画布左上角端点坐标的数组 
   int w=100,h=100; 
   int radius=30; 
   Planet() 
   {   setSize(w,h);  
      setLayout(null); 
      yellowBall=new Mycanvas(); 
      yellowBall.setColor(Color.yellow); 
      add(yellowBall); 
      yellowBall.setSize(12,12); 
      yellowBall.setR(12/2); 
      pointX[0]=0;            pointY[0]=-radius; 
      double angle=1*Math.PI/180;      //刻度为1度    
      for(int i=0;i<359;i++)         //计算出数组中各个元素的值  
      {   pointX[i+1]=pointX[i]*Math.cos(angle)-Math.sin(angle)*pointY[i]; 
         pointY[i+1]=pointY[i]*Math.cos(angle)+pointX[i]*Math.sin(angle); 
      } 
      for(int i=0;i<360;i++)       
      {   pointX[i]=pointX[i]+w/2;    //坐标平移       
         pointY[i]=pointY[i]+h/2; 
      } 
      yellowBall.setLocation((int)pointX[0]-yellowBall.getR(), 
                            (int)pointY[0]-yellowBall.getR()); 
      moon=new Thread(this); //创建 moon线程，当前面板做为该线程的目标对象 
   } 
   public void start() 
   {   try 
      {   moon .start(); 
      } 
      catch(Exception exe){} 
   } 
   public void paint(Graphics g) 
   {   g.setColor(Color.blue); 
      g.fillOval(w/2-9,h/2-9,18,18); 
   } 
   public void run() 
   {   int i=0; 
      while(true) 
      {   i=(i+1)%360; 
         yellowBall.setLocation((int)pointX[i]-yellowBall.getR(), 
                                (int)pointY[i]-yellowBall.getR()); 
         try 
         { Thread.sleep(10);// Thread类调用类方法sleep使得线程中断10豪秒 
         }    
         catch(InterruptedException e){} 
      } 
   } 
} 
class HaveThreadFrame extends Frame implements Runnable 
{   Thread rotate;//用Thread类声明一个rotate对象 
   Planet earth; 
   double    pointX[]=new double[360],  
         pointY[]=new double[360];  
   int width,height; 
   int radius=120; 
   HaveThreadFrame() 
   {   rotate=new Thread(this); 
      earth=new Planet(); 
      setBounds(0,0,360,400); 
      width=getBounds().width; 
      height=getBounds().height; 
      pointX[0]=0; 
      pointY[0]=-radius; 
      double angle=1*Math.PI/180;    
      for(int i=0;i<359;i++)     
      {   pointX[i+1]=pointX[i]*Math.cos(angle)-Math.sin(angle)*pointY[i]; 
         pointY[i+1]=pointY[i]*Math.cos(angle)+pointX[i]*Math.sin(angle); 
      } 
      for(int i=0;i<360;i++)        
      {   pointX[i]=pointX[i]+width/2; 
         pointY[i]=pointY[i]+height/2; 
      } 
      setLayout(null); 
      setVisible(true); 
      validate(); 
      addWindowListener(new WindowAdapter() 
                     {   public void windowClosing(WindowEvent e) 
                        {   System.exit(0); 
                        } 
                     }); 
      add(earth); 
      earth.setLocation((int)pointX[0]-earth.getSize().width/2, 
                  (int)pointY[0]-earth.getSize().height/2); 
      earth.start();  
      rotate.start();//用rotate调用start方法 
   } 
   public void run() 
   {   int i=0; 
      while(true) 
      {   i=(i+1)%360; 
         earth.setLocation((int)pointX[i]-earth.getSize().width/2, 
                     (int)pointY[i]-earth.getSize().height/2); 
         try 
         {   Thread.sleep(100); 
         }    
         catch(InterruptedException e){   } 
      } 
   } 
   public void paint(Graphics g) 
   {   g.setColor(Color.red); 
      g.fillOval(width/2-15,height/2-15,30,30); 
   } 
} 
public class ThreadRotateMainClass 
{   public static void main(String args[]) 
   {   new HaveThreadFrame(); 
   } 
}