Integer value set : HashSet « Collections « Java Tutorial

1. Java Tutorial
2. Collections
3. HashSet

import java.util.HashSet;

public class Main {
  public static void main(String[] args) {
    HashSet<Integer> hSet = new HashSet<Integer>();

    hSet.add(new Integer("1"));
    hSet.add(new Integer("2"));
    hSet.add(new Integer("3"));
    System.out.println("HashSet contains.." + hSet);

  }

}
//HashSet contains..[1, 2, 3]