EnumSet noneOf() Method in Java
The java.util.EnumSet.noneOf(Class elementType) method in Java is used to create a null set of the type elementType.
Syntax:
public static <E extends Enum<E>> EnumSet<E> noneOf(Class<E> elementType)
Parameters: The method accepts one parameter elementType of element type and refers to the class object of the element type for this enum set.
Return Value: The method does not return any value.
Exceptions: The method throws NullPointerException if the elementType is Null.
Below programs illustrate the working of Java.util.EnumSet.noneOf() method:
Program 1:
import java.util.*;
enum GFG {
Welcome,
To,
The,
World,
of,
Geeks
}
;
public class Enum_Set_Demo {
public static void main(String[] args)
{
EnumSet<GFG> e_set = EnumSet.allOf(GFG. class );
System.out.println( "The first set is: " + e_set);
EnumSet<GFG> other_set = EnumSet.noneOf(GFG. class );
System.out.println( "The other set is: " + other_set);
}
}
|
Output:
The first set is: [Welcome, To, The, World, of, Geeks]
The other set is: []
Program 2:
import java.util.*;
enum CARS {
RANGE_ROVER,
MUSTANG,
CAMARO,
AUDI,
BMW
}
;
public class Enum_Set_Demo {
public static void main(String[] args)
{
EnumSet<CARS> e_set = EnumSet.allOf(CARS. class );
System.out.println( "The first set is: " + e_set);
EnumSet<CARS> other_set = EnumSet.noneOf(CARS. class );
System.out.println( "The other set is: " + other_set);
}
}
|
Output:
The first set is: [RANGE_ROVER, MUSTANG, CAMARO, AUDI, BMW]
The other set is: []
Last Updated :
02 Jul, 2018
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