Enums are lists of constants . When you need a predefined list of values which do represent some kind of numeric or textual data, you should use an enum. You should always use enums when a variable (especially a method parameter) can only take one out of a small set of possible values.
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Enumeration in C++ Enum is a user defined data type where we specify a set of values for a variable and the variable can only take one out of a small set of possible values. We use enum keyword to define a Enumeration.
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An enumeration type (or enum type) is a value type defined by a set of named constants of the underlying integral numeric type . To define an enumeration type, use the enum keyword and specify the names of enum members: C# Copy.
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A string object that can have only one value, chosen from the list of values ‘value1’, ‘value2’, …, NULL or the special ” error value. In theory, an ENUM column can have a maximum of 65,535 distinct values ; in practice, the real maximum depends on many factors. ENUM values are represented internally as integers.
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You cannot create an object of an enum explicitly so, you need to add a parameterized constructor to initialize the value(s) . The initialization should be done only once. Therefore, the constructor must be declared private or default. To returns the values of the constants using an instance method(getter).5 Tem 2019
Read moreCan enum have multiple values?
Learn to create Java enum where each enum constant may contain multiple values . We may use any of the values of the enum constant in our application code, and we should be able to get the enum constant from any of the values assigned to it.
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Methods and variables in an enumeration Enumerations are similar to classes and, you can have variables, methods, and constructors within them .
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