Frequent.java

public static int getFreq(List<Integer> list) {

  int mostFreq = 0;
  //System.out.println("list is " + list);

  Map<Integer, Integer> map = new HashMap<>();
  for (int i : list) {
    int freq = Collections.frequency(list, i);
    map.put(i, freq);
  }

  Map.Entry<Integer, Integer> max = null;

  for (Map.Entry<Integer, Integer> entry : map.entrySet()) {
    if (max == null || entry.getValue() > max.getValue()) {
      max = entry;
    }
  }

  System.out.println(map.toString());
  if (max != null) {
    mostFreq = max.getKey();
    //System.out.println(max.getKey());
    //System.out.println(max.getValue());
  }

  return mostFreq;
}