EnumSet size() in Java

size(): This method is available in java.util.EnumSet class of Java.

Syntax:

int java.util.AbstractCollection.size()

This method returns the number of elements in this collection.

Note: If this collection contains more than Integer.MAX_VALUE elements return Integer.MAX_VALUE.

Parameters: NA

Returns: the number of elements in this collection.

Exceptions: NA

Approach

Java

import java.util.EnumSet;

public class EnumSetsize {
    public enum Colour {
        RED, GREEN, YELLOW, ORANGE
    };

    public static void main(String[] args) {

        EnumSet<Colour> enumSet = EnumSet.allOf(Colour.class);

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

    }
}

Output:

4