I am able to insert duplicate entries in TreeSet. How to overcome this

Question

I have a class called Employee which has employeeName and employeeId as its member variables.I am creating new Employee objects and then adding it

Answer 1

you should compare string not with ==, but with equals() method, and also you should override your compareTo method to compare with employeeName not with employeeId, if you want it in that way.

(Employee)emp).employeeName.equals(this.employeeName)

and

public int compareTo(Employee emp) {

  return (this.employeeName-emp.employeeName);
}