EnumSet allof() Method in Java
Last Updated :
02 Jul, 2018
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The Java.util.EnumSet.allOf(Class elementType ) in Java is used to create an enum set that will be used to contain all of the elements in the specified elementType.
Syntax:
Java
Java
public staticParameters: The method accepts one parameter elementType of element type and refers to the class object whose elements are to be stored into the 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.allOf() method: Program 1:> EnumSet allOf(Class elementType )
// Java program to demonstrate allof() method
import java.util.*;
// Creating an enum of GFG type
enum GFG {
Welcome,
To,
The,
World,
of,
Geeks
}
;
public class Enum_Set_Demo {
public static void main(String[] args)
{
// Creating an empty EnumSet
EnumSet<GFG> e_set = null;
// Displaying the empty EnumSet
System.out.println(e_set);
// Getting all elements from GFG
e_set = EnumSet.allOf(GFG.class);
// Displaying the final set
System.out.println("The updated set is:" + e_set);
}
}
Output:
Program 2:
null The updated set is:[Welcome, To, The, World, of, Geeks]
// Java program to demonstrate allof() method
import java.util.*;
// Creating an enum of CARS type
enum CARS {
RANGE_ROVER,
MUSTANG,
CAMARO,
AUDI,
BMW
}
;
public class Enum_Set_Demo {
public static void main(String[] args)
{
// Creating an empty EnumSet
EnumSet<CARS> e_set = null;
// Displaying the empty EnumSet
System.out.println(e_set);
// Getting all elements from CARS
e_set = EnumSet.allOf(CARS.class);
// Displaying the final set
System.out.println("The updated set is:" + e_set);
}
}
Output:
null The updated set is:[RANGE_ROVER, MUSTANG, CAMARO, AUDI, BMW]
