Remove specified element from Java HashSet example
- /*
- Remove specified element from Java HashSet example
- This Java Example shows how to remove a specified object or element
- contained in Java HashSet object using remove method.
- */
- import java.util.HashSet;
- public class RemoveSpecifiedElementFromHashSetExample {
- 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"));
- System.out.println("HashSet before removal : " + hSet);
- /*
- To remove an element from Java HashSet object use,
- boolean remove(Object o) method.
- This method removes an element from HashSet if it is present and returns
- true. Otherwise remove method returns false.
- */
- boolean blnRemoved = hSet.remove(new Integer("2"));
- System.out.println("Was 2 removed from HashSet ? " + blnRemoved);
- System.out.println("HashSet after removal : " + hSet);
- }
- }
- /*
- Output would be
- HashSet before removal : [3, 2, 1]
- Was 2 removed from HashSet ? true
- HashSet after removal : [3, 1]
- */
