Return type from a Comparator

Question

What does the return value inside the Comparator actually mean?

For example :

class TreeSetDemo
{
    public static void main(String         


        

Answer 1

It's about sort algorithm which needs compare.

Correct:

class MyComparator implements Comparator {
    public int compare(Integer o1, Integer o2) {
        // Calling the Integer class's compareTo method
        return o1.compareTo(o2);
    }
}