Check if a particular element exists in Java HashSet 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
- */
