import greenfoot.*; 

/**
 * This class defines a Tank.
 */
public class Panzer extends Actor 
{
   long time = System.currentTimeMillis();
   int HP = 3;
   
   public void act(){
       checkKeyPress();
       Treffer();
       DestroyTank();
      
    }
      
    
   public void checkKeyPress () {
       
        if (Greenfoot.isKeyDown("left")){
            
                move(-8);
            }
        
        
        if (Greenfoot.isKeyDown("right")){
            
                move(8);
            }
        
        
        if (Greenfoot.isKeyDown("up")){
            setLocation(getX(),(getY()-10));
        }
        
        if (Greenfoot.isKeyDown("down")){
            setLocation(getX(), (getY()+10));
        }
       
        if(Greenfoot.isKeyDown("space") )
        {
            long time1 = System.currentTimeMillis();
            if (time1 >= time + (500)){
               getWorld().addObject(new Bullet(getRotation()), getX()+115, getY()+5);
                time = time1;
            }
        }
   }
   
   public void Treffer()
    { 
       if(isTouching(TowerRocket.class))
       {
           removeTouching(TowerRocket.class);
           HP--;
        }
    }
    
    public void DestroyTank(){
        
       if(HP == 0)
       {
           /*Greenfoot.setWorld (new Tankworld1());*/
           getWorld().removeObject(this);
           
           
        }
    }
    
}
   

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


public class Bullet extends Actor
{
      
    
    private int direction, speed;
    public Bullet(int dir)
    {
        direction = dir;
        speed = 15;
    }
    public void act()
    {
        setRotation(direction);
        move(speed);
        berührtRand();
    }
    
     
    
    public void berührtRand()
    {
        
       if (isAtEdge())
       {
          getWorld().removeObject(this);

       
}
}
}

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

/**
 * Write a description of class Base here.
 * 
 * @author (your name) 
 * @version (a version number or a date)
 */
public class Tower extends Actor
{
    int HP=3;
    long time = System.currentTimeMillis();
      

    public void act()
    { 
       automaticMovement();
       
       if(isTouching(Bullet.class))
       {
           removeTouching(Bullet.class);
           HP--;
        }
       if(HP == 0)
       {
           setImage("explosion.png");
           Greenfoot.delay (30);
           getWorld().removeObject(this);
           Greenfoot.playSound("Explosion.wav");
        }
       {long time1 = System.currentTimeMillis(); 
            if (time1 >= time + (500)){
               getWorld().addObject(new TowerRocket(getRotation()-20), getX()-80, getY());
                time = time1;
            }
        }
    }
    
    public void automaticMovement()
    {
       Panzer P = getObjectsInRange (9999, Panzer.class).get(0);
       turnTowards (P.getX(), P.getY());
       turn(200);
       
}
}

move(80);