[ACCEPTED]-where is Enum.values() defined?-enums
Accepted answer
This is required by the Java Language Specification: values
and valueOf
will be 4 implicitly declared for all Enums:
/**
* Returns an array containing the constants of this enum
* type, in the order they're declared. This method may be
* used to iterate over the constants as follows:
*
* for(E c : E.values())
* System.out.println(c);
*
* @return an array containing the constants of this enum
* type, in the order they're declared
*/
public static E[] values();
/**
* Returns the enum constant of this type with the specified
* name.
* The string must match exactly an identifier used to declare
* an enum constant in this type. (Extraneous whitespace
* characters are not permitted.)
*
* @return the enum constant with the specified name
* @throws IllegalArgumentException if this enum type has no
* constant with the specified name
*/
public static E valueOf(String name);
These 3 methods are added during compile time, so 2 if you use javap
to disassemble the code, you 1 can actually look at their body.
It's not explicitly defined, just like length
property 2 of java array is not defined. It is implicitly 1 available for concrete Enum type.
Source:
stackoverflow.com
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