Get the size of a hash set

int size()
Returns the number of elements in this set (its cardinality).

  import java.util.HashSet;

public class Main {
  public static void main(String args[]) {
    HashSet<String> hs = new HashSet<String>();

    hs.add("java2s.com");
    hs.add("A");
    hs.add("D");
    hs.add("E");
    hs.add("C");
    hs.add("j a v a2s.com");
    System.out.println(hs.size());
    hs.remove("A");
    System.out.println(hs.size());
  }
}

The output: 


6
5
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HashSet:
  1. HashSet class
  2. Add element to hash set
  3. Clear a hash set
  4. Clone a hash set
  5. If a hash set contain a certain element
  6. Is this set containing a certain element
  7. Get an iterator from a hash set
  8. Remove an element from hash set
  9. Get the size of a hash set