public class Test {
    Test m;
    String id;
    Test(String s)
    {
      id=s;
    }
    void show()
    {
    System.out.println(id);
    }
    public static void main(String args[])
    {
    Test m1=new Test("Original m1");
    Test m2=new Test("Orginal m2");
    Test m3=new Test("Orginal m3");
    m1.m=m2;
    m2.m=m3;
    m3.m=m1;
    m1=null;
    m2=null;
    m3.show(); // original m3
    m3.m.show(); // original m1
    m3.m.m.show(); // orginal m2


    }

}