Bong Pong

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.awt.*;

public class PongWorld  extends World
{
   Ball b;
    Paddle p1,p2;
    int hits1,hits2;
    boolean started=true;
    ScoreBoard1 sb1;
    ScoreBoard2 sb2;
    GameOver go;
    public PongWorld()
    {
        // Create a new world with 600x400 cells with a cell size of 1x1 pixels.
        super(600, 400, 1);
        GreenfootImage bg=new GreenfootImage(600,600);
        bg.setColor(Color.green);
        bg.drawRect(0,0,600,600);
        bg.fill();
        bg.setColor(Color.white);
        bg.fillRect(300,0,2,600);
        setBackground(bg);
        b=new Ball(-2,2);
        addObject(b,300,300);
        p1=new Paddle(1);
        addObject(p1,10,100);
        p2=new Paddle(2);
        addObject(p2,590,100);
        sb1=new ScoreBoard1();
        addObject(sb1,100,50);
        sb2=new ScoreBoard2();
        addObject(sb2,500,50);
    }
    public void act()
    {
//         if (Greenfoot.isKeyDown("enter"))
//         {
//             started=true;
//             addObject(b,getWidth()/2,getHeight()/2);
//         }
//         if (started==false)
//         return;
        if (p1.checkForHit()==true)
        b.reverseX();
        if (p2.checkForHit()==true)
        b.reverseX();
        if (b.missedOnRight==true)
        {
            hits1++;
            //System.out.println("Hits1="+hits1);
            b.setLocation(getWidth()/2,getHeight()/2);
           b.reverseX();
       sb1.drawScore(hits1);
        }

        if (b.missedOnLeft==true)
        {
            hits2++;
            System.out.println("Hits2="+hits2);
            b.setLocation(getWidth()/2,getHeight()/2);
            b.reverseX();
         sb2.drawScore(hits2);
        }
        if (hits1==10)
      {
      removeObject(b);
      go=new GameOver();
      addObject(go,300,200);
      Greenfoot.stop();
      }
      if (hits2==10)
      {
      removeObject(b);
      go=new GameOver();
      addObject(go,300,200);
      Greenfoot.stop();
      }
    }
}


Ball


import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)


public class Ball  extends Actor
{
    int X,Y,xSpeed,ySpeed,Width,Height;
    GreenfootImage pic;
    public boolean missedOnLeft=false;
    public boolean missedOnRight=false;
    public Ball(int xs,int ys)
    {
       xSpeed=xs;
       ySpeed=ys;
       pic=getImage();
       Width=pic.getWidth()/4;
       Height=pic.getHeight()/4;
       pic.scale(Width,Height);
    }
    public void act()
    {
        X=getX()+xSpeed;
        Y=getY()+ySpeed;
        World w=getWorld();
        missedOnLeft=false;
        missedOnRight=false;
        if (X<=Width/2)
        {
           missedOnLeft=true;
           return;
        }
        if (Y>=w.getHeight()-Height/2)
        ySpeed=-ySpeed;
        if (X>=w.getWidth()-Width/2)
        {
            missedOnRight=true;
            return;
        }
        if (Y<=Height/2)
        ySpeed=-ySpeed;
        setLocation(X,Y);
    }
    public void reverseX()
    {
        xSpeed=-xSpeed;
    }
}

Game Over

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

/**
 * Write a description of class GameOver here.
 *
 * @author (your name)
 * @version (a version number or a date)
 */
public class GameOver  extends Actor
{
GreenfootImage pic;
public GameOver()
{
pic=getImage();

}

}

ScoreBoard1


import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.awt.*;

public class ScoreBoard1  extends Actor
{
    GreenfootImage pic;
    public ScoreBoard1()
    {
        drawScore(0);
    }
    public void drawScore(int hits)
    {
        pic=new GreenfootImage (150,50);
        pic.setColor(Color.white);
        pic.setTransparency(150);
        pic.fill();
        pic.setFont(new Font("Serif",Font.BOLD,25));
        pic.setColor(Color.red);
        pic.drawString("Misses1="+hits,0,20);
        setImage(pic);
    }
}

ScoreBoard 2


import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)
import java.awt.*;

public class ScoreBoard2  extends Actor
{
    GreenfootImage pic;
    public ScoreBoard2()
    {
        drawScore(0);
    }
    public void drawScore(int hits)
    {
        pic=new GreenfootImage (150,50);
        pic.setColor(Color.white);
        pic.setTransparency(150);
        pic.fill();
        pic.setFont(new Font("Serif",Font.BOLD,25));
        pic.setColor(Color.red);
        pic.drawString("Misses2="+hits,0,20);
        setImage(pic);
    }
}

Paddle

import greenfoot.*;  // (World, Actor, GreenfootImage, Greenfoot and MouseInfo)

import java.awt.*;
public class Paddle  extends Actor
{
    int X,Y,Width,Height;
    int side;
    GreenfootImage pic;
    final int left=1,right=2;
    public Paddle(int s)
    {
        side=s;
        pic=new GreenfootImage(20,80);
        Width=20;
        Height=80;
        if (side==left)
        {
            pic.setColor(Color.black);
            pic.fillRect(0,0,Width,Height);
            setImage(pic);
        }
        if (side==right)
        {
            pic.setColor(Color.black);
            pic.fillRect(0,0,Width,Height);
            setImage(pic);
        }
    }
    public boolean checkForHit()
    {
        Ball b=(Ball)getOneIntersectingObject(Ball.class);
        if (b !=null)
        return true;
        return false;
    }
    public void act()
    {
        World w=getWorld();
        X=getX();
        Y=getY();
        if (side==left)
        {
            if (Greenfoot.isKeyDown("up"))
            {
                if(Y>=Height/2)
                Y=Y-5;

                setLocation(X,Y);
            }
            if (Greenfoot.isKeyDown("down"))
            {
                if (Y<=w.getHeight()-Height/2)
                Y=Y+5;
                setLocation(X,Y);


            }

        }
        if (side==right)
        {
            if (Greenfoot.isKeyDown("W"))
            {
                if(Y>=Height/2)
                Y=Y-5;

                setLocation(X,Y);
            }
            if (Greenfoot.isKeyDown("S"))
            {
                if (Y<=w.getHeight()-Height/2)
                Y=Y+5;
                setLocation(X,Y);


            }

        }
    }
}