Java Collections - Collections.frequency() Examples

package com.logicbig.example.collections;

import java.util.ArrayList;
import java.util.Collections;
import java.util.List;

public class FrequencyExample {

    public static void main(String... args) {
        List<Integer> list = new ArrayList<>();
        list.add(1);
        list.add(2);
        list.add(1);
        int i = Collections.frequency(list, 1);
        System.out.println(i);
    }
}