q on threads

[JayaSiji Gopal]

Hi!

 
public class BettyAck {
    public static void main(String argv[]){
BettyAck b =new BettyAck();
    }
    public BettyAck() {
Integer x = new Integer(10);
        findOut(x);
Integer y = new Integer(99);
        Integer z = y;
        z = null;
        findOut(y); 
        //here
    }
    public void  findOut(Integer y){
y = null;
        
    }
}

Options are:

1 0
2 1
3 2
4 3
5 4

I answered three, but the correct ans is zero. yy?

plz explain. Wht i understand is when u pass objects, u r passing a reference to the original object. so, when u pass x to the method findOut, this method sets x = null and hence, it becomes eligible for garbage collection. Am i wrong or is there any other way to look at this?



(code tags added - pseudo english not corrected)
[ November 10, 2004: Message edited by: Barry Gaunt ]

[Barry Gaunt]

Like, what was the question? How many threads?

[Atul Chandran]

When x is passed to the method findOut(Integer y) the value contained in x is copied to y. The value contained in x is not the object itself but a value which can be used to locate the object.

Since x and y will contain same values they can both locate and access the object. We are only setting y to null but x still contains the value...or in other words a reference to the Integer object and hence it cannot be garbage collected.
[ November 10, 2004: Message edited by: Atul Chandran ]

[Vipin Das]

Hi JayaSiji Gopal,
In this post u haven't mention any questions. It is totally irritating.