Java Collection How to - Get Differences Between Two Integer Collection

Question

We would like to know how to get Differences Between Two Integer Collection.

Answer

import java.util.Arrays;
import java.util.LinkedList;
import java.util.List;
/*from  ww w . ja v a2 s . com*/
public class Main {
  public static void main(String[] args) {
    List<Integer> first = Arrays.asList(2, 3, 4, 5);
    List<Integer> second = Arrays.asList(1, 3, 4, 6);

    List<Integer> missing = new LinkedList<Integer>();
    List<Integer> added = new LinkedList<Integer>(second);

    for (Integer i : first) {
      if (!added.remove(i)) {
        missing.add(i);
      }
    }

    System.out.println("Missing ints in second: " + missing);
    System.out.println("New ints in second: " + added);
  }
}

The code above generates the following result.