Java EnumSet - of() Method
The java.util.EnumSet.of() method is used to create an enum set initially containing the specified element.
Syntax
public static <E extends Enum<E>> EnumSet<E> of(E e)
Here, E is the type of element maintained by the container.
Parameters
e |
Specify the element that this set is to contain initially. |
Return Value
Returns an enum set initially containing the specified element.
Exception
Throws NullPointerException, if e is null.
Example:
In the example below, the java.util.EnumSet.of() method is used to create an enum set initially containing the specified element.
import java.util.*;
public class MyClass {
//creating an enum
public enum weekday{
SUN, MON, TUE, WED, THU, FRI, SAT
}
public static void main(String[] args) {
//creating an EnumSet
EnumSet<weekday> Set;
//Add one element using of() method
Set = EnumSet.of(weekday.SUN);
//print the content of Set
System.out.println("Set contains: "+ Set);
//Add another element using of() method
//which replaces the previous element
Set = EnumSet.of(weekday.FRI);
//print the content of Set
System.out.println("Set contains: "+ Set);
}
}
The output of the above code will be:
Set contains: [SUN] Set contains: [FRI]
❮ Java.util - EnumSet
