Syntax error What are enumerations in Java? How to retrieve values from an enum?

What are enumerations in Java? How to retrieve values from an enum?

Enumeration (enum) in Java is a datatype which stores a set of constant values. You can use enumerations to store fixed values such as days in a week, months in a year etc.

You can define an enumeration using the keyword enum followed by the name of the enumeration as −

enum Days {
   SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY
}

Just like arrays, the elements/constants in an enumeration are identified using numbers starting from 0 in the above example the days are identified using numbers as shown in the following illustration −

Retrieving values from an enum

You can retrieve all the elements of an enum using the values() method.

Example

 Live Demo

enum Days {
   SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY, SATURDAY
}
public class EnumerationExample {
   public static void main(String args[]) {
      Days constants[] = Days.values();
      System.out.println("Value of constants: ");
      for(Days d: constants) {
         System.out.println(d);
      }
   }
}

Output

Value of constants:
SUNDAY
MONDAY
TUESDAY
WEDNESDAY
THURSDAY
FRIDAY
SATURDAY
Updated on: 2019-07-30T22:30:26+05:30

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