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What is the difference between enum and constant?
With a set of constants, any value of the same intrinsic type could be used, introducing errors. With an enum only the applicable values can be used.
Can enums have string values?
Enum Values You can assign different values to enum member. The enum can be of any numeric data type such as byte, sbyte, short, ushort, int, uint, long, or ulong. However, an enum cannot be a string type.
How do you define an enum constant?
An enum type is a special data type that enables for a variable to be a set of predefined constants. The variable must be equal to one of the values that have been predefined for it. Common examples include compass directions (values of NORTH, SOUTH, EAST, and WEST) and the days of the week.
Why do you use enums instead of constants in Java?
Enums limit you to the required set of inputs whereas even if you use constant strings you still can use other String not part of your logic. This helps you to not make a mistake, to enter something out of the domain, while entering data and also improves the program readability. Additionally you can always use your enums as a String if you desire.
What’s the difference between an enumerator list and an enum?
Whereas Enumerator lists are useful for defining sequences and states, particularly when there is a natural progression through those states. This is because each constant in the list can be formatted and compared using either its name or value. An enum can also be used to define a limited set of valid values.
How to change default from INT to enum?
You can change the default from int to any other integral type except char like: You can cast explicitly from and implicitly to the the base type, which is useful in switch-statements. Beware that one can cast any value of the base type to an enum, even if the enum has no member with the appropriate value.
When to use an enumeration or a constant?
Constants should be for a single value, like PI. There isn’t a range of PI values, there is just PI. a: Constants don’t necessarily indicate a relationship between the constants, whereas an enumeration indicates that something can be one of the set defined by the enum.