The Java.util.HashSet.size() method is used to get the size of the HashSet or the number of elements present in the HashSet.
Syntax:
Hash_Set.size()
Parameters: This method does not takes any parameter.
Return Value: The method returns the size or the number of elements present in the HashSet.
Below program illustrate the Java.util.HashSet.size() method:
// Java code to illustrate HashSet.size() method import java.util.*;
import java.util.HashSet;
public class HashSetDemo {
public static void main(String args[])
{
// Creating an empty HashSet
HashSet<String> set = new HashSet<String>();
// Use add() method to add elements into the Set
set.add( "Welcome" );
set.add( "To" );
set.add( "Geeks" );
set.add( "4" );
set.add( "Geeks" );
// Displaying the HashSet
System.out.println( "HashSet: " + set);
// Displaying the size of the HashSet
System.out.println( "The size of the set is: " + set.size());
}
} |
Output:
HashSet: [4, Geeks, Welcome, To] The size of the set is: 4