Get Size of Java HashSet : HashSet « Collections Data Structure « Java

1. Java
2. Collections Data Structure
3. HashSet

Get Size of Java HashSet

      

import java.util.HashSet;

public class Main {
  public static void main(String[] args) {
    HashSet<Integer> hSet = new HashSet<Integer>();
    System.out.println("Size of HashSet : " + hSet.size());

    hSet.add(new Integer("1"));
    hSet.add(new Integer("2"));
    hSet.add(new Integer("3"));

    System.out.println(hSet.size());

    hSet.remove(new Integer("1"));
    System.out.println(hSet.size());
  }
}
/*
Size of HashSet : 0
3
2
*/

   
    
    
    
    
    
  

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