Dear experts
Since the new version of Greenfoot 3.53 I have a simple problem. Whenever I try to access an object in the MyWorld class, I get a null pointer exception.
I don' t know why because the same thing is working with other older projects ...
Could you have a look at my code, I just made a simple interaction
This is the MyWorld class, where I generate the objects
This is another class where I want to use a reference
Thanks for your help
wueschn
import greenfoot.*;
public class MyWorld extends World
{
private Bees b;
private Frogs f;
private Snakes s;
public MyWorld()
{
super(600, 400, 1);
Bees b = new Bees();
this.addObject(b, 100, 100);
Frogs f = new Frogs();
this.addObject(f, 200, 200);
Snakes s = new Snakes();
this.addObject(s, 300, 300);
}
public Bees getBees()
{
return this.b;
}
public Snakes getSnakes()
{
return this.s;
}
public Frogs getFrogs()
{
return this.f;
}
}import greenfoot.*;
public class Bees extends Actor
{
public void act()
{
if(Greenfoot.mouseClicked(this))
{
//this.getWorldOfType(MyWorld.class).getFrogs().move(10);
MyWorld world = (MyWorld) this.getWorld();
world.getSnakes().move(10);
}
}
}