In Java, can an enumeration (Enum) extend any class?

An enumeration (enum) in Java is a data type that stores a set of constant values. You can use enumerations to store fixed values ​​such as days of the week, months of the year, etc.

You can define an enumeration using the keyword enum followed by the enumeration name as shown below -

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

Just like an array, in the above example, the elements/constants in the enumeration Identified using numbers starting from 0, as shown in the following image:

# Enumeration classes are similar to classes in that you can have variables, methods, and constructors. Only concrete methods are allowed in enumerations.

Extension class

All enumeration classes will internally extend a class named Enum, which is the base class of all language enumeration types. Since Java does not support multiple inheritance, a compile-time error will be generated if you try to extend an enum class to another class.

Sample

In the following Java code snippet, we have a class called Sample and have created an enumeration type called Scooters and are trying to extend it to the Sample class.

import java.util.Scanner;
class Sample {
}
enum Scooters extends Sample {
}

Output

On executing, this class generates the following compile time error.
D:\>javac EnumExample.java
EnumExample.java:5: error: '{' expected
enum Scooters extends Sample{
              ^
EnumExample.java:5: error: ',', '}', or ';' expected
enum Scooters extends Sample{
                      ^
2 errors

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