where is Enum.values() defined?
enums, java
Solution
This is required by the Java Language Specification: `values` and `valueOf` will be 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 methods are added during compile time, so if you use `javap` to disassemble the code, you can actually look at their body.
Problem
Every Java enumeration has a static values() method can be used like this ``` for (MyEnum enum : MyEnum.values()) { // Do something with enum } ``` However, I cannot figure out where this method is defined. There's no mention of it in the Javadoc and it doesn't appear anywhere in the source file.