Styjun

import javax.swing.*;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.util.Timer;
import java.util.TimerTask;

public class Hunter extends JFrame implements KeyListener


public class helper extends TimerTask 

 @Override
 public void run() 
 int randomm=(int)(Math.random()*4);
 int randommm = (int) ((Math.random() * 490) + 10);
 obj obj1 = new Hunter().new obj(randommm, 0);
 MyThreadTS k = new MyThreadTS(obj1, getGraphics());
 MyThreadS k1 = new MyThreadS(obj1, getGraphics());
 MyThreadM k2= new MyThreadM(obj1, getGraphics());
 MyThreadF k3 = new MyThreadF(obj1, getGraphics());
 MyThreadTF k4 = new MyThreadTF(obj1, getGraphics());

 switch (randomm) 
 case 0:
 k.start();
 break;
 case 1:
 k1.start();
 break;
 case 2:
 k2.start();
 break;
 case 3:
 k3.start();
 break;
 case 4:
 k4.start();
 
 
 

public class obj
 int x,y;
 public obj(int x,int y)
 this.x=x;
 this.y=y;
 

public class MyThreadTS extends Thread
 Graphics g;
 int x,y;
 public MyThreadTS(obj obj,Graphics g)
 this.x=obj.x;
 this.y=obj.y;
 this.g=g;
 
 public void run()
 try 
 while (y<491) 
 if ((x>=positionX && x<=positionX+50)&& 
 (y>=positionY && y<=positionY+50)
 

 catch (InterruptedException e) 
 e.printStackTrace();
 

 
 
public class MyThreadS extends Thread
 Graphics g;
 int x,y;
 public MyThreadS(obj obj,Graphics g)
 this.x=obj.x;
 this.y=obj.y;
 this.g=g;
 
 public void run()
 try 
 while (y<491) 

 catch (InterruptedException e) 
 e.printStackTrace();
 
 

public class MyThreadM extends Thread
 Graphics g;
 int x,y;
 public MyThreadM(obj obj,Graphics g)
 this.x=obj.x;
 this.y=obj.y;
 this.g=g;
 
 public void run()
 try 
 while (y<491) (x+10>=positionX && 
 x+10<=positionX+50)&&(y+10>=positionY && 
 y+10<=positionY+50)) 

 stop();
 

 Thread.sleep(50);
 y++;
 g.setColor(Color.red);
 g.fillRect(x, y, 10, 10);
 //repaint();
 

 catch (InterruptedException e) 
 e.printStackTrace();
 
 
public class MyThreadF extends Thread
 int x,y;
 Graphics g;
 public MyThreadF(obj obj,Graphics g)
 this.x=obj.x;
 this.y=obj.y;
 this.g=g;
 
 public void run()
 try 
 while (y<491) 
 if ((x>=positionX && x<=positionX+50)&& 
 (y>=positionY && y<=positionY+50)
 

 catch (InterruptedException e) 
 e.printStackTrace();
 
 
public class MyThreadTF extends Thread
 int x,y;
 Graphics g;
 public MyThreadTF(obj obj,Graphics g)
 this.x=obj.x;
 this.y=obj.y;
 this.g=g;
 
 public void run()
 try 
 while (y <491) 

 catch (InterruptedException e) 
 e.printStackTrace();
 
 




public Hunter()
 setSize(500, 500);
 setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 setLayout(new BorderLayout());
 addKeyListener(this);

int positionX=250,positionY=250;
public void paint(Graphics g)
 super.paint(g);
 g.setColor(Color.blue);
 g.fillRect(positionX,positionY,50,50);
 g.setColor(Color.red);



public static void main(String [] args)

 Hunter game=new Hunter();
 game.setVisible(true);
 Hunter.helper helper=game.new helper();
 Timer timer=new Timer();
 timer.schedule(helper,0, 300);

@Override
public void keyTyped(KeyEvent keyEvent) 
@Override
public void keyPressed(KeyEvent keyEvent) 
 int keyCode=keyEvent.getKeyCode();

 if (keyCode==38)
 if(positionY<10)

 
 else 

 positionY -= 10;
 repaint();
 
 
 else if(keyCode==40)
 if (positionY>440)

 
 else 
 positionY += 10;
 repaint();
 
 
 else if(keyCode==37)
 if (positionX<10)

 
 else 
 positionX -= 10;
 repaint();
 
 
 else if(keyCode==39)
 if (positionX>440)

 
 else 
 positionX += 10;
 repaint();
 
 

@Override
public void keyReleased(KeyEvent keyEvent) 
 

in my code i have a prey-hunter game.Blue square eat red and black rectangles.They are created randomly each 0.5 sec and they are falling down in a specific time.But i have a trouble with red and black rectangles because if i use repaint method for each new paint it doesn't work correctly.They looks cloudy.How can i fix this?

i want to create my red and black rectangles like that: