MostCommonElementDictionary

package com.company;

import java.util.*;

public class Main {

    public static void main(String[] args) {
        int[] myArr = new int[]{5, 3, 4, 3, 4, 5, 4 };
        Map<Integer, Integer> numsMap = new HashMap<Integer, Integer>();

        for (int number : myArr) {
            if (numsMap.containsKey(number)) {
                Integer count = numsMap.get(number) + 1;
                numsMap.put(number, count);
            } else {
                numsMap.put(number, 1);
            }
        }
        System.out.println(numsMap);
        int maxEntry = Collections.max(numsMap.entrySet(), Map.Entry.comparingByValue()).getKey();
        System.out.println("MostCommonKey = " + maxEntry + ", Exist: " + numsMap.get(maxEntry) + " times.");
    }
}