- Java.util Package Classes
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- Java.util - UUID
- Java.util - Vector
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- Java.util Package Extras
- Java.util - Interfaces
- Java.util - Exceptions
- Java.util - Enumerations
- Java.util Useful Resources
- Java.util - Useful Resources
- Java.util - Discussion
Java.util.EnumSet.complementOf() Method
Description
The java.util.EnumSet.complementOf(EnumSet<E> s) method creates an enum set with the same element type as the specified enum set.It contains all the elements of this type that are not contained in the specified set.
Declaration
Following is the declaration for java.util.EnumSet.complementOf() method
public static <E extends Enum<E>> EnumSet<E> complementOf(EnumSet<E> s)
Parameters
s − the enum set from whose complement to initialize this enum set.
Return Value
This method does not return any value.
Exception
NullPointerException − if s is null
Example
The following example shows the usage of java.util.EnumSet.complementOf() 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 EnumSet that has only Numbers.FOUR as element EnumSet<Numbers> set1 = EnumSet.of(Numbers.FOUR); // print the set System.out.println("Set1:" + set1); // create a set2 which has all elements that set1 doesn't have EnumSet<Numbers> set2 = EnumSet.complementOf(set1); // print the updated set System.out.println("Set2:" + set2); } }
Let us compile and run the above program, this will produce the following result −
Set1:[FOUR] Set2:[ONE, TWO, THREE, FIVE]
java_util_enumset.htm
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