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]
