Abstract Enum Class Java

This java enum tutorial explains how to create and use a java enum. To create an enum use the enum keyword instead of class or interface and separate the constants with a comma. Java enums an enum is a special class that represents a group of constants unchangeable variables like final variables.
abstract enum class java

An enumerated type in java is a type whose values consist of a fixed set of constants.

Abstract enum class java. A java enumis a special java type used to define collections more precisely a java enum type is a special kind of java class. And you want to have some behavior associated with each value. As a class can only extend one parent in java so an enum cannot extend anything else. This is the common base class of all java language enumeration types.

Public enum someenumclass one two three. Enum can implement many interfaces. Tostring method is overridden in javalangenum classwhich returns enum constant name. The method declared in this class is compareto due to the implementation of the comparable interface clone hashcode tostring and equals due to the inheritance of the object class.

Java programming language enum types are much more powerful than their counterparts in other languages. An enum can contain constants methods etc. Note that they should be in uppercase letters. These methods are present inside java.

Abstract class in java a class which is declared with the abstract keyword is known as an abstract class in java. In java you cant extend enum or create some abstract enum or even generify enum. Before learning the java abstract class lets understand the abstraction in java first. It can have abstract and non abstract methods method with the body.

The enum class body can include methods and other fields. Lets say your enum. Public abstract class enume extends enume extends object implements comparablee serializable the javalangenum does not have a public constructor. The compiler automatically adds some special methods when it creates an enum.

Values ordinal and valueof methods. In java enumerated types are kinds of classes which have predefined set of instances. This sounds quite theoretical so lets try with an informal way of describing them. If you want to have some polymorphic extension point over your enum you can apply such a pattern.

This is quite different to c where enums are a much simpler type. The enum declaration defines a class called an enum type. Java enums were added in java 5. More information about enums including descriptions of the implicitly declared methods synthesized by the compiler can be found in section 89 of the java language specification.

All enums implicitly extend javalangenum class.