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Check for element existence in HashSet example


package com.javacodegeeks.snippets.core;
 
import java.util.HashSet;
 
public class ElementExistsHashSet {
 
  public static void main(String[] args) {
 
    // Create a HashSet and populate it with elements
    HashSet hashSet = new HashSet();
    hashSet.add("element_1");
    hashSet.add("element_2");
    hashSet.add("element_3");
 
    // boolean contains(Object value) method returns true if the HashSet contains the value, otherwise false.
    boolean exists = hashSet.contains("element_2");
    System.out.println("element_2 exists in HashSet ? : " + exists);
 
  }
}

Output:
element_2 exists in HashSet ? : true