Is it okay for a class to have a field of its own type

Question

I did the following, i got a stackoverflow error after some time, and I understand why it was.

public class Cat {
    String name=\"default name\";
    Cat i         


        

Answer 1

There is nothing wrong in having an instance member of same class. an Employee has a manager and the manager is also an Employee

 public class Employee{
     private Employee manager;
     //getters setters and constructor
 }