Java program to create an EnumSet collection

Java example to create an EnumSet collection.
Submitted by Nidhi, on May 27, 2022

Problem statement

In this program, we will create an Enum for COLORS constants. Then we will create a set of enum constants using the EnumSet collection.

Java program to create an EnumSet collection

The source code to create an EnumSet collection is given below. The given program is compiled and executed successfully.

// Java program to create an EnumSet collection

import java.util.*;

//Enum for color constants
enum COLORS {
  RED,
  GREEN,
  BLUE,
  BLACK,
  WHITE
};

public class Main {
  public static void main(String[] args) {
    EnumSet < COLORS > enumSet;

    //Adding elements to EnumSet.
    enumSet = EnumSet.of(COLORS.BLUE, COLORS.BLACK, COLORS.GREEN, COLORS.WHITE);

    System.out.println("EnumSet is: " + enumSet);
  }
}

Output

EnumSet is: [GREEN, BLUE, BLACK, WHITE]

Explanation

The Main class contains a main() method. The main() method is the entry point for the program. And, created a reference of EnumSet collection and initialized it with of() method with constants of the enum. After that, we printed the created enum.