Memory leak in Java? -

i wondering if following code produced sort of memory leak in java. anyways here's code:

public class test {     public static void main(string[] args){         a = new a();         a.x = new a(new a(new a(new a(a))));         a.x.x = null;     } }  class a{     public x = null;     a() {}     a(a a){         x = a;      } } 

if number a's:

a = new a(); //        1 a.x = new a(new a(new a(new a(a)))); //        2     3     4     5 

then have circular chain:

a → 1 → 2 → 3 → 4 → 5 → 1 

when break circle using a.x.x = null, get:

a → 1 → 2 

instances 3, 4, , 5 eligible garbage collection.

then, when main exits, a goes out of scope, , instances 1 , 2 eligible garbage collection.

note program end before gc has chance anything.