Java EnumSet class

Last Updated : 13 Feb 2026

Java EnumSet class is the specialized Set implementation for use with enum types. It inherits AbstractSet class and implements the Set interface.

EnumSet class hierarchy

The hierarchy of EnumSet class is given in the figure given below.

EnumSet class declaration

Let's see the declaration for java.util.EnumSet class.

public abstract class EnumSet<E extends Enum<E>> extends AbstractSet<E> implements Cloneable, Serializable

Methods of Java EnumSet class

Method	Description
static <E extends Enum<E>> EnumSet<E> allOf(Class<E> elementType)	It is used to create an enum set containing all of the elements in the specified element type.
static <E extends Enum<E>> EnumSet<E> copyOf(Collection<E> c)	It is used to create an enum set initialized from the specified collection.
static <E extends Enum<E>> EnumSet<E> noneOf(Class<E> elementType)	It is used to create an empty enum set with the specified element type.
static <E extends Enum<E>> EnumSet<E> of(E e)	It is used to create an enum set initially containing the specified element.
static <E extends Enum<E>> EnumSet<E> range(E from, E to)	It is used to create an enum set initially containing the specified elements.
EnumSet<E> clone()	It is used to return a copy of this set.

Java EnumSet Example

Java EnumSet

import java.util.*;
enum days {
  SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY
}
public class Main {
  public static void main(String[] args) {
    Set<days> set = EnumSet.of(days.TUESDAY, days.WEDNESDAY);
    // Traversing elements
    Iterator<days> iter = set.iterator();
    while (iter.hasNext())
      System.out.println(iter.next());
  }
}

Compile and Run

Output:

TUESDAY
WEDNESDAY

Java EnumSet Example: allOf() and noneOf()

Java EnumSet

import java.util.*;
enum days {
  SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY
}
public class Main {
  public static void main(String[] args) {
    Set<days> set1 = EnumSet.allOf(days.class);
      System.out.println("Week Days:"+set1);
      Set<days> set2 = EnumSet.noneOf(days.class);
      System.out.println("Week Days:"+set2);   
  }
}

Compile and Run

Output:

Week Days:[SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY]
Week Days:[]

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