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https://docs.oracle.com/javase/tutorial/java/javaOO/enum.html
Note: All enums implicitly extend java.lang.Enum. Because a class can only extend one parent (see Declaring Classes ), the Java language does not support multiple inheritance of state (see Multiple Inheritance of State, Implementation, and Type ), and therefore an enum cannot extend anything else.
https://www.javatpoint.com/enum-in-java
Java Enum is a data type which contains fixed set of constants. It can be used for days of the week (SUNDAY, MONDAY, TUESDAY, WEDNESDAY, THURSDAY, FRIDAY and SATURDAY) , directions (NORTH, SOUTH, EAST and WEST) etc. The enum constants are static and final implicitely. It is available from Java 5. Enums can be thought of as classes that have fixed set of constants.
https://www.infoq.com/news/2017/01/java-enhanced-enums/
Java enums will be enhanced with generics support and with the ability to add methods to individual items, a new JEP shows. Since both features can be delivered with the same code change, they are bun
https://howtodoinjava.com/java/enum/enum-tutorial/
Java enum, also called Java enumeration type, is a type whose fields consist of a fixed set of constants. The very purpose of enum is to enforce compile time type safety. enum keyword is reserved keyword in Java. We should use enum when we know all possible values of a variable at compile time or ...
https://www.w3schools.com/java/java_enums.asp
Java Enums. 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:
https://dzone.com/articles/using-java-enums
The output of running the test in IntelliJ is: Enum Iteration. You can iterate through an enum to access its values. The static values() method of the java.lang.Enum class that all enums inherit ...
https://www.journaldev.com/716/java-enum
We will also look into the benefits of using enums in java and features of enum types. We will also learn using Java Enum valueOf, enum values, EnumSet and EnumMap with examples. Java Enum Example. Java enum keyword is used to create an enum type. Let’s have a look at the java enum …
https://crunchify.com/why-and-for-what-should-i-use-enum-java-enum-examples/
Some very important points on Java Enum: Point-1. All enums implicitly extend java.lang.Enum.Since Java does not support multiple inheritance, an enum cannot extend anything else.. Point-2. Enum in Java are type-safe: Enum has there own name-space. It means your enum will have a type for example “Company” in below example and you can not assign any value other than specified in Enum Constants.
https://www.mindprod.com/jgloss/enum.html
enum Java version 1.5 or later has built-in support for enumerated types. Prior to that you had to kludge them in some way with static final int s (which were not typesafe) or with Object s which would not work in switch statements.
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