Join the social network of Tech Nerds, increase skill rank, get work, manage projects...
 
  • HashSet Class

    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 0
    • 207
    Comment on it

    HashSet Class:

    It extends AbstractList class and implements List interface. It uses hashing technique to store data. It contains only unique elements. We can use HashSet class by importing java.util package.

    Example:

    import java.util.*;
    
    public class HashDemo {
    
       public static void main(String args[]) {
          // create a hash set 
          HashSet hash = new HashSet();
          // add elements to the hash set using add() function
          hash.add("B");
          hash.add("A");
          hash.add("D");
          hash.add("E");
          hash.add("C");
          hash.add("F");
          System.out.println(hash); //printing the hash collection
       }
    }

    Output:

    [A, B, C, D, E, F]

    List can have duplicate elements but Set contains unique elements only.

    Some of the mostly used methods of HashSet :

    add(): used to add a element to the set

    clear(): Removes all element from the set.

    remove() :Removes the specified element from the set if it is present.

 0 Comment(s)

Sign In
                           OR                           
                           OR                           
Register

Sign up using

                           OR                           
Forgot Password
Fill out the form below and instructions to reset your password will be emailed to you:
Reset Password
Fill out the form below and reset your password: