Uhm....
Try:
Short story = 200;
Cardboard go(Cardboard cb){
cb = null;
return cb;
}
public static void main(String args[]){
Cardboard c1 = new Cardboard();
Cardboard c2 = new Cardboard();
Cardboard c3 = c1.go(c2);
c1 = null;
System.out.println(c2.story);
}
}
Hint:
Java
parameters are always passed by value.