My Treeset only adds 1 class object

Question

I\'m trying to add the below book objects to a TreeSet. However, when I debug the code, it says that the set has a size of 1 and only contains the first object added (book1). Wh

Answer 1

Update your compareTo method based on your requirement. Or at least update as below, it will allow to insert all objects in treeset.

public int compareTo(Book o) {
// TODO Auto-generated method stub
return this.compareTo(o);
}