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:
// Java program to demonstrate allof() methodimport java.util.*;  // Creating an enum of GFG typeenum 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:
null The updated set is:[Welcome, To, The, World, of, Geeks]
Program 2:
// Java program to demonstrate allof() methodimport java.util.*;  // Creating an enum of CARS typeenum 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]
