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Enum to Integer and Integer to Enum in Java. Published on November 5, 2015 by Bo Andersen. Need to convert an integer to an enum in Java? The bad news is that it is not as easy as it should be, but the good news is that it is still easy! Consider the enum below. 02/09/2017 · In this guide to Java enum with string values, learn to create enum using strings, iterate over all enum values, get enum value and to perform reverse lookup to find enum by string parameter. You should always create enum when you have fixed set. 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. Java Enum example. As a class enum just need to use “enum” keyword” before the name Enum Class in Java. There is some guidance for constant – It should be written as uppercase letters, So enum type’s fields also uppercase letters.

Enum in Java is a datatype that helps us assign a predefined set of constants to a variable. In this quick article, we'll see different ways in which we can iterate over an Enum in Java. 2. Iterating Over Enum Values. Let's first define an Enum, so that we can create some simple code examples. Enum was introduced in Java 1.5 as a new type whose fields consists of a fixed set of constants. For example, we can create directions as Java Enum with fixed fields as. 14/01/2020 · The java.lang.Enum.name method returns the name of this enum constant, exactly as declared in its enum declaration. Declaration. Following is the declaration for java.lang.Enum.name method. public final String name Parameters. NA. Return Value. This method returns the name of this enum constant. Exception. NA. Example. IllegalArgumentException − if the specified enum type has no constant with the specified name, or the specified class object does not represent an enum type. NullPointerException − if enumType or name is null. Example. The following example shows the usage of java.lang.Enum.valueOf method.

Java enum FAQ: Can you share a Java enum switch example, i.e., how to use an enum with a Java switch statement? In my earlier Java enum examples tutorial, I demonstrated how to declare a simple Java enum, and then how to use an enum with a variety of Java constructs, including a Java switch statement, a for loop, and an if/then statement. Since Enum in Java allows a programmer to override an inherited method and since Enum has access to all Object class method, you can easily override toString method to provide a custom String implementation for an Enum instance which can further use to convert that Enum instance to String in Java. The name must match exactly an identifier used to declare an enum constant in this type. Extraneous whitespace characters are not permitted. Note that for a particular enum type T, the implicitly declared public static T valueOfString method on that enum may be used instead of this method to map from a name to the corresponding enum constant.

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