An object is considered eligible for Garbage Collection when no reachable variable refers it.
Public Class Isolation {
Isolation i
public static void main(
String[] args) {
Isolation a = new Isolation()
Isolation b = new Isolation()
a.i = b;
b.i = a;
a = null;
b = null;
}
}
In this situatio the objects a and b are referred by b.i and a.i instance variables. However after assigning a and b to null, a.i and b.i become unreachable and inspite of having a reference varible, they are made eligible for GC because these objects can no longer be accessed by the program any longer.
