What is the use of enum keyword

Answer 1

Enum serves as a type of fixed number of constants and can be used at least for two things

constant

public enum Month {
JANUARY, FEBRUARY, ...
}
This is much better than creating a bunch of integer constants.

creating a singleton

public enum Singleton {
INSTANCE

// init
};

You can do quite interesting things with enums, look at

http://javarevisited.blogspot.com/2011/08/enum-in-java-example-tutorial.html

Also look at the

http://docs.oracle.com/javase/tutorial/java/javaOO/enum.html

-stackoverflow

Answer 2

https://www.sololearn.com/Discuss/433088/?ref=app