Custom Map Entry Comparator

App.java

package com.ericski;

import java.util.Arrays;
import java.util.Collections;
import java.util.Comparator;
import java.util.HashMap;
import java.util.Map;
import java.util.stream.Collectors;

public class App 
{
    public static class EntryComparator implements Comparator<Map.Entry<Integer,Integer>> {
        @Override
        public int compare(Map.Entry<Integer, Integer> o1, Map.Entry<Integer, Integer> o2) {
            int cv = Integer.compare(o1.getValue(),o2.getValue());
            if (cv == 0) {
                return Integer.compare(o1.getKey(), o2.getKey());
            }
            return cv;
        }
    }

    public static void process(int[] input) {
        var counts = new HashMap<Integer, Integer>();
        Arrays.stream(input).forEach(i -> counts.put(i,counts.getOrDefault(i,0) + 1));
        
        var l2 = counts.entrySet().stream().sorted(new EntryComparator()).collect(Collectors.toList());
        Collections.reverse(l2);
        
        System.out.println(" Original Map: " + counts);
        System.out.println("Sorted Values: " + l2);
    }


    public static void main( String[] args )
    {
        process(new int[]{1,2,3,4,5,1,2,3,1,2,3,1,2,5,5,5});
    }
}