Boxworld

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

/**
 * Write a description of class box here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Box extends Actor
{
    private int amountOfBoxes=0;
    private long startTijd = System.currentTimeMillis();
    private GreenfootImage image1 = new GreenfootImage("apple.png");
    private GreenfootImage image2 = new GreenfootImage("ball.png");
    /**
     * Act - do whatever the box wants to do. This method is called whenever
     * the 'Act' or 'Run' button gets pressed in the environment.
     */
    public void act() 
    {
        if(rightPlace()){
            changeBox();
            amountOfBoxes++;
        }
        if(rightPlace()==false&&getImage()==image1)
        {
            changeBox2();
            if(amountOfBoxes<0)
                amountOfBoxes--;
        }
        if(getAmountOfBoxes()==4){
            long tijd = System.currentTimeMillis();
            long tijdsduur = (tijd - startTijd) / 1000;
            String message= "winner winner chicken dinner" + " time: " + tijdsduur + " seconds";
            getWorld().showText(message, getWorld().getWidth()/2, getWorld().getHeight()/2);
            Greenfoot.stop();
        }
    }    

    /**
     * checks if the box is in the right place (on a point)
     */
    public Boolean rightPlace()
    {
        Actor actor = getOneObjectAtOffset(0,0,Point.class);
        return actor != null;
    }

    /**
     * returns how many boxes you have placed on the right place
     */
    public int getAmountOfBoxes()
    {
        return amountOfBoxes;
    }

    /**
     * changes the box to indicate that it is in the right place
     */
    public void changeBox()
    {
        Point point = (Point) getOneObjectAtOffset(0,0,Point.class);
        if(point!= null)
            setImage("apple.png");
    }

    public void changeBox2()
    {
        setImage("ball.png");
    }
}