Java program for without duplicate elements from the two arrayList Objects

We can retrieve elements without duplicate elements from the two arrayList Objects by using Set interface.we can add the two arrayList Objects to set by using addAll() method.

Program :

import java.util.ArrayList;
import java.util.Collections;
import java.util.HashSet;
import java.util.List;
import java.util.Set;
import javax.annotation.Resources;
public class ArrayList1 {

public static void main(String[] args) {

List l1=new ArrayList();
l1.add(1);
l1.add(2);
l1.add(3);

List l2=new ArrayList();

l2.add(3);
l2.add(2);
l2.add(4);
l2.add(1);
l2.add(5);

List l3=new ArrayList();

Set<Integer> s=new HashSet<Integer>();
s.addAll(l1);
s.addAll(l2);
System.out.println(s);

}

}

Out put:

[1, 2, 3, 4, 5]