Crazy programmers

Frequently asked Interview Question..
How to create Immutable class solution...below. Happy coding.

class Ajay{
Ajay a3=new Ajay();
Ajay a4=new Ajay();

}

class test{
public static void main(String args[]){
Ajay a1=new Ajay();
Ajay a2=new Ajay();


//System.out.println(a1==a2);
System.out.println(a1.a3==a1.a4);
}

}

Program output showing some thing weird i was expecting it as a runtime error but it run sucessfully output is

:\JavaPrac>The system cannot find the file specified.
'The' is not recognized as an internal or external command,
operable program or batch file.

D:\JavaPrac>
D:\JavaPrac>D:\JavaPrac> at Ajay.(langsix.java:2)
The system cannot find the file specified.