Java EnumSet - range() Method

The java.util.EnumSet.range() method is used to create an enum set initially containing all of the elements in the range defined by the two specified endpoints.

Syntax

public static <E extends Enum<E>> EnumSet<E> range(E from,
                                                   E to)

Here, E is the type of element maintained by the container.

Parameters

Return Value

Returns an enum set initially containing all of the elements in the range defined by the two specified endpoints.

Exception

• Throws NullPointerException, if from or to are null.
• Throws IllegalArgumentException, if from.compareTo(to) > 0.

Example:

In the example below, the java.util.EnumSet.range() method is used to create an enum set initially containing all of the elements in the specified range.

import java.util.*;

public class MyClass {
  
  //creating an enum
  public enum weekday{
    SUN, MON, TUE, WED, THU, FRI, SAT
  }

  public static void main(String[] args) {
    //creating an EnumSet
    EnumSet<weekday> Set;

    //Add elements using range() method
    Set = EnumSet.range(weekday.MON, weekday.FRI);
    
    //print the content of Set
    System.out.println("Set contains: "+ Set);  
  }
}

The output of the above code will be:

Set contains: [MON, TUE, WED, THU, FRI]