Question

class Forest {    

    void lion(){  
        System.out.println("king of the jungle");
    }

    public static void main (String a[]){
        Forest f = new Forest();
        f.lion(); //call 1
        Forest j = f;
        j.lion(); // call 2
    }
}

what is the difference between call 1 & call 2?
If object f is removed what happens in call 2?

Answer 1

1. object will not be removed (as references are still active, the GarbageCollector will not destroy it)
2. The calls are the same (they both call the same method on the same instance of forest
3. Indeed, doing f=null; before j.lion(); will not have any apparent consequence

Additionally, get a tool like Eclipse that will issue warnings when you don’t follow the naming conventions for Java. Better get used to it at the beginning.