The java.util.Set.size() method is used to get the size of the Set or the number of elements present in the Set.
Syntax:
int size()
Parameters: This method does not takes any parameter.
Return Value: The method returns the size or the number of elements present in the Set.
Below program illustrate the java.util.Set.size() method:
// Java code to illustrate Set.size() method import java.util.*; public class SetDemo { public static void main(String args[]) { // Creating an empty Set Set<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 Set System.out.println("Set: " + set); // Displaying the size of the Set System.out.println("The size of the set is: " + set.size()); }} |
Output:
Set: [4, Geeks, Welcome, To] The size of the set is: 4
Reference: https://docs.oracle.com/javase/7/docs/api/java/util/Set.html#size()
