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The Java type system, however, treats enumerations as a type separate from integers, and intermixing of enum and integer values is not allowed. In fact, an enum type in Java is actually a special compiler-generated class rather than an arithmetic type, and enum values behave as global pre-generated instances of that class. Enum types can have ...
Switch statements in Java can use byte, short, char, and int (not long) primitive data types or their corresponding wrapper types. Starting with J2SE 5.0, it is possible to use enum types. Starting with Java SE 7, it is possible to use Strings. [2] Other reference types cannot be used in switch statements. Possible values are listed using case ...
enum (added in J2SE 5.0) [4] A Java keyword used to declare an enumerated type. Enumerations extend the base class Enum. extends Used in a class declaration to specify the superclass; used in an interface declaration to specify one or more superinterfaces.
The java.nio.file.LinkOption is an example of emulating extensible enums with interfaces. [6] In Java, it is not possible to have one Enum extend another Enum . However, it is possible to emulate an extensible Enum type by having an Enum implement one or more interfaces.
In Java, the multiton pattern can be implemented using an enumerated type, with the values of the type corresponding to the instances. In the case of an enumerated type with a single value, this gives the singleton pattern. In C#, we can also use enums, as the following example shows:
Unsigned primitive types turned out never to be implemented in Java. [6] The enum keyword for enumerated types was implemented in Java for Java 5.0. The assert keyword was implemented in Java for Java 1.4 [7] Other concepts were different from, or improved later, for Java: [4] Abstract methods were defined as in C++.
U.S. President Donald Trump signs documents as he issues executive orders and pardons for January 6 defendants in the Oval Office at the White House on Inauguration Day in Washington, U.S ...
Enumerations in C# are implicitly derived from the Enum type that again is a value type derivative. The value set of a C# enumeration is defined by the underlying type that can be a signed or unsigned integer type of 8, 16, 32 or 64 bits. The enumeration definition defines names for the selected integer values.