Hi, I'm trying to set an integer in one class (bl) to equal an integer in another class (or). I have done this many times before, but for some reason it is not working anymore. The class with the original integer (bl) is returning null, even though it has been added to the world.
Code for or:
Code for the world class tron:
public int xx;
public int yy;
public int rr;
int x = 0;
int y = 0;
public bl b;
int o = 0;
public void addedToWorld(World tron){
setRotation(180);
}
/**
* Act - do whatever the or wants to do. This method is called whenever
* the 'Act' or 'Run' button gets pressed in the environment.
*/
public void act()
{
tron t = (tron)getWorld();
b = t.getBl();
if(b!=null){ //b is returning null, if I got rid of this line I would get nullPointerException
xx = b.x();
yy = b.y();
rr = b.r();
}import greenfoot.*;
/**
* Write a description of class tron here.
*
* @author (your name)
* @version (a version number or a date)
*/
public class tron extends World
{
private bl bl_;
private or o;
public int x = 0;
public int y = 0;
public int r = 0;
/**
* Constructor for objects of class tron.
*
*/
public tron()
{
super(800, 600, 1);
bl bl_ = new bl();
addObject(bl_,200,300);
or o_ = new or();
addObject(o_,600,300);
}
public void act(){
int c = 0;
prepare();
c = 7;
}
public bl getBl()
{
return bl_;
}
public void prepare(){
}
}