Java.util.EnumSet.allOf() Method

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Description

The java.util.EnumSet.allOf(Class<E> elementType) method creates an enum set containing all of the elements in the specified element type.

Declaration

Following is the declaration for java.util.EnumSet.allOf() method

public static <E extends Enum<E>> EnumSet<E> allOf(Class<E> elementType)

Parameters

  • elementType --the class object of the element type for this enum set

Return Value

This method does not return a value.

Exception

  • NullPointerException--if elementType is null

Example

The following example shows the usage of java.util.EnumSet.allOf() method.

package com.tutorialspoint;

import java.util.*;

public class EnumSetDemo {

   // create an enum
   public enum Numbers {

      ONE, TWO, THREE, FOUR, FIVE
   };

   public static void main(String[] args) {

      // create an empty EnumSet 
      EnumSet<Numbers> set = null;

      // print the set
      System.out.println(set);

      // create the set by getting all elements from Numbers
      set = EnumSet.allOf(Numbers.class);

      // print the updated set
      System.out.println("Updated set:" + set);

   }
}

Let us compile and run the above program, this will produce the following result:

null
Updated set[ONE, TWO, THREE, FOUR, FIVE]



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