EnumSet allof() Method in Java
Last Updated :
02 Jul, 2018
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:
public static > EnumSet allOf(Class elementType)
Parameters: 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:
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 = null ;
System.out.println(e_set);
e_set = EnumSet.allOf(GFG. class );
System.out.println( "The updated set is:" + e_set);
}
}
|
Output:
null
The updated set is:[Welcome, To, The, World, of, Geeks]
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 = null ;
System.out.println(e_set);
e_set = EnumSet.allOf(CARS. class );
System.out.println( "The updated set is:" + e_set);
}
}
|
Output:
null
The updated set is:[RANGE_ROVER, MUSTANG, CAMARO, AUDI, BMW]
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