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

public class CrabWorld extends World
{
    /**
     * Create the crab world (the beach). Our world has a size 
     * of 560x560 cells, where every cell is just 1 pixel.
     */
    public CrabWorld() 
    {
        super(560, 560, 1);
        Crab c = new Crab();
        addObject(c, 100, 100);
        for(int i=0;i<3;i++) {
           Lobster l=new Lobster();
           addObject(l,200+i*20,200+i*50);
       }
       for (int i = 0;i <5 ;i ++) {
             Worm w =new Worm();
             addObject(w, 50 + i * 50, 150 + i * 50);
            }
       for (int i = 0;i <5 ;i ++) {
             Worm w =new Worm();
             addObject(w, 50 + i * 100, 100);
            }    
       for (int i = 0;i <5 ;i ++) {
             Worm w =new Worm();
             addObject(w, 250 + i * 50, 350 - i * 50 );
            }
        }
        
        public void drawNum(int num){
               GreenfootImage image = getBackground();
               Color color = new Color(255, 0, 0);
               image.setColor(color);
               image.drawString("吃虫数:"+ num,200,200);
            }
            
        }