Intersection example in Collection Framework

Below example explains that, how we can get the common data or intersection of two collections.

Intersection.java:

package com.lnn.utils;

import java.util.ArrayList;

import java.util.Collection;

public class Intersection {

      public static void main(String[] args) {

            Collection<Integer> two = new ArrayList<Integer>();

            Collection<Integer> three = new ArrayList<Integer>();

            for (int i = 1; i < 100; i++) {

                  if (i % 2 == 0) {

                        two.add(i);

                  }

                  if (i % 3 == 0) {

                        three.add(i);

                  }

            }

            Collection<Integer> common = new ArrayList<Integer>();

            common.addAll(two);

            common.retainAll(three);

            for (int i : common) {

                  System.out.println(i);

            }

      }

}