1.Basic java example program to check particular element is exists in hashset
Output:
- boolean contains(Object o) This method Returns true if this set contains the specified element
- package com.checkelementhashset;
- import java.util.HashSet;
- import java.util.Iterator;
- public class HashsetExample{
- public static void main(String[] args) {
- //create object of HashSet
- HashSet<Integer> hashSet = new HashSet();
- //add elements to HashSet object
- hashSet.add(1);
- hashSet.add(2);
- hashSet.add(3);
- hashSet.add(4);
- hashSet.add(5);
- /*
- To check whether a particular value exists in HashSetwe need to use
- boolean contains(Object value) method of HashSet class.
- this method returns true if the HashSet contains the value, otherwise returns false.
- */
- boolean isExists = hashSet.contains(5);
- System.out.println("5 exists in HashSet ? : " + isExists);
- Iterator it=hashSet.iterator();
- while(it.hasNext()){
- System.out.println(it.next());
- }
- }
- }
Output:
- 3 exists in HashSet ? : true
- 1
- 2
- 3
- 4
- 5
