shootball

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


public class MyWorld extends World
{

    Counter counter = new Counter();
    
    public MyWorld()
    {    

        super(900, 600, 1); 
        prepare();
    }
    public Counter getCounter()
    {
        return counter;
    }
    
    private void prepare()
    {
        Rocket rocket = new Rocket();
        addObject(rocket,91,299);

        Ball [] ball = new Ball[7];
        for(int i=0; i<ball.length; i++)
        {
            ball[i] = new Ball();
            int ballX = Greenfoot.getRandomNumber(getWidth());
            int ballY = Greenfoot.getRandomNumber(getHeight());
            addObject(ball[i], ballX, ballY);
        }
        addObject(counter, 38, 49);
    }
}

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


public class Ball extends Actor
{
   
    public void act() 
    {
        move(5);
        
    }
    public void move()
    {
       int x = getX();
       int y = getY();
        
        
       if(Greenfoot.isKeyDown("right"))x++;
       if(Greenfoot.isKeyDown("left"))x--;
       if(Greenfoot.isKeyDown("up"))y--;
       if(Greenfoot.isKeyDown("down"))y++;
       setLocation(x,y);
    
       
            
       
       ((MyWorld)getWorld()).getCounter().addScore();
          
       
    }
    
    }

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


public class Counter extends Actor
{
   int score = 0; 
    
   public Counter()
    {
        updateImage();
    }
    
    public void updateImage()
    {
        setImage(new GreenfootImage("Score :" + score, 20, Color.WHITE, Color.BLACK));
    }
    public void addScore()
    {
        score++;
        updateImage();
    } 
    
}

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


public class Fire extends Actor
{
    
    public void act() 
    {
     move(10); 
     Actor ball = getOneIntersectingObject(Ball.class);
     if (ball!=null)
     {
         World myWorld = getWorld();
         myWorld.removeObject(ball);
         myWorld.removeObject(this);
     } 
     else if (isAtEdge()!=false)
     {
         World myWorld = getWorld();
         myWorld.removeObject(this);
     }
    }    
}

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


public class Rocket extends Actor
{
   Fire fire = new Fire();
    
    public void act() 
    {
      
        if(Greenfoot.isKeyDown("left"))
        {
            setLocation(getX()-5, getY());
        }
        if(Greenfoot.isKeyDown("right"))
        {
            setLocation(getX()+5, getY());
        }
        if(Greenfoot.isKeyDown("up"))
        {
            setLocation(getX(), getY()-5);
        }
        if(Greenfoot.isKeyDown("down"))
        {
            setLocation(getX(), getY()+5);
        }
        fire();
        fireOnCommand();
    }
        
    private void fire()
    {
        Actor ball = getOneIntersectingObject(Ball.class);
        if(ball != null)
        {
            World myWorld = getWorld();
            myWorld.removeObject(this);
        }
    }
    
    public void fireOnCommand()
    {
        if(Greenfoot.isKeyDown("a"))
        {
            World myWorld = getWorld();
            myWorld.addObject(fire, 0, 0);
            fire.setLocation(getX(), getY());
            
        }
    } 
     
}