Check if a particular element exists in Java HashSet

   package org.best.example;
    /*
      Check if a particular element exists in Java HashSet Example
      This Java Example shows how to check whether an elements is contained in Java
      HashSet using contains method.
    */
    
    import java.util.HashSet;
    
    public class CheckElementHashSetExample {
    
      public static void main(String[] args) {
    
        //create object of HashSet
        HashSet hSet = new HashSet();
      
        //add elements to HashSet object
        hSet.add(new Integer("1"));
        hSet.add(new Integer("2"));
        hSet.add(new Integer("3"));
    
        /*
          To check whether a particular value exists in HashSet use
          boolean contains(Object value) method of HashSet class.
          It returns true if the HashSet contains the value, otherwise false.
        */
      
        boolean blnExists = hSet.contains(new Integer("3"));
        System.out.println("3 exists in HashSet ? : " + blnExists);
    
      }
    }
    
    /*
    Output would be
    3 exists in HashSet ? : true
    */