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Java program to create an EnumSet collection from all elements of an enum

// Java program to create an EnumSet collection 
// from all elements of an enum

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.allOf(COLORS.class);

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

Output

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