import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;

public class HiirPall3 extends Applet implements MouseListener{
  Pall pyydmispall=null;
  public HiirPall3(){
    addMouseListener(this);
  }

  double kaugus(int x1, int y1, int x2, int y2){
    int dx=x2-x1;
    int dy=y2-y1;
    return Math.sqrt(dx*dx+dy*dy);
  }

  public void mousePressed(MouseEvent e){
   if(pyydmispall==null){
    pyydmispall=new Pall(e.getX(), e.getY());    
   } else {
     if(kaugus(e.getX(), e.getY(), pyydmispall.x, pyydmispall.y)<
                                                    pyydmispall.r){
        pyydmispall.x=(int)(Math.random()*200);
        pyydmispall.y=(int)(Math.random()*100);
     }
   }
  }

  class Pall extends Thread{
    int x, y, r=10;
    Graphics g=HiirPall3.this.getGraphics();
    public Pall(int uus_x, int uus_y){
       x=uus_x;
       y=uus_y;
       start();
    }
    public void run(){
      while(y<200){
        int jx=x, jy=y;
        g.setColor(Color.black);
        g.drawOval(jx-r, jy-r, 2*r, 2*r);
        try{Thread.sleep(100);}catch(Exception erind){}        
        g.setColor(Color.white);
        g.drawOval(jx-r, jy-r, 2*r, 2*r);
        y=y+3;
      }
    }
  }


  public void mouseReleased(MouseEvent e){}
  public void mouseClicked(MouseEvent e){}
  public void mouseEntered(MouseEvent e){}
  public void mouseExited(MouseEvent e){}

  


  public static void main(String[] argumendid){
    Frame f=new Frame();
    f.add(new HiirPall3());
    f.setSize(200, 200);
    f.setVisible(true);
  }
}