Java Programming - Garbage Collections - Discussion

i cant understand

Every time, when we create new X() we make not 1, but 2 objects (because one more object create in line 3 ).

That's why after line 11, we are eligible for garbage collection 2 object.
P.S.

Sorry for my English :)

Ans: 2 Object are garbage collected. Because,

public X2 x;
public static void main(String [] args)
{
X2 x2 = new X2(); /* Line 6 */
X2 x3 = new X2(); /* Line 7 */
x2.x = x3;
x3.x = x2;
x2 = new X2();
x3 = x2; /* Line 11 */
doComplexStuff();
}

Here the statement (x2.x = x3;) will hold new X2() object. And when x variable of type X hold another object called x2 at that moment one object garbage collected. G: x3 because one variable will hold one address. Not more than one variable.

And another object got garbage collected at the moment when we call x2 = new X2() ;

So total 2 object got garbage collected.

The correct answer is C.

after main()
We assign the class X2's reference-id to x2(X2 x2=new X2()).
After it, we again assigning the reference-id of 2 to x3(X2 x3=new X2()).
So,x2 become eligible for GC.
Just before line 11 again reference-id of class X2 is going to x2 (x2=new X2).
therefor now x3 become eligible for GC.
That's why the answer is C.