import java.util.EnumSet;
class Main {
enum Size {
SMALL, MEDIUM, LARGE, EXTRALARGE
}
public static void main(String[] args) {
// Using of() with a single parameter
EnumSet<Size> sizes1 = EnumSet.of(Size.MEDIUM);
System.out.println("EnumSet1: " + sizes1);
EnumSet<Size> sizes2 = EnumSet.of(Size.SMALL, Size.LARGE);
System.out.println("EnumSet2: " + sizes2);
}
}