why does my compare method throw exception — Comparison method violates its general contract!

Question

Why does this code

public class SponsoredComparator implements Comparator {

    public boolean equals(SRE arg0, SRE arg1){
        return arg0.g         


        

Answer 1

My solution: When I want to sort numbers and an array element is null, I put 0 then the error disappears. It is needed to take care that the sizes of each row in the two-dimensional arrays are the same.