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What is the main idea behind Java enum Keyword?
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❮ Java Keywords
enumDefinition and Usage
The enum keyword declares an enumerated (unchangeable) type.
An enum is a special "class" that represents a group of constants (unchangeable variables, like final variables).
To create an enum, use the enum keyword (instead of class or interface), and separate the constants with a comma. Note that they should be in uppercase letters.
An enum can, just like a class , have attributes and methods. The only difference is that enum constants are public , static and final (unchangeable - cannot be overridden).
An enum cannot be used to create objects, and it can not extend other classes (but it can implement interfaces).
Use enums when you have values that you know aren't going to change, like month days, days, colors, deck of cards, etc.
Related Pages
Read more about enums in our Java Enum Tutorial .
❮ Java Keywords