Where is the documentation for the values method of Enum

Question

I declare an enum as     enum Sex  MALE FEMALE     And then  iterate enum as shown below    for Sex v   Sex values         System out println   values     v       I checked the Java API but can t find the values   method  I m curious as to where this method comes from    API link    https   docs oracle com javase 8 docs api java lang Enum html

User · Answer

The method is implicitly defined  i e  generated by the compiler    From the JLS      In addition  if E is the name of an enum type  then that type has the following implicitly declared static methods         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

User · Answer

Run this       for  Method m   sex class getDeclaredMethods              System out println m           you will see   public static test Sex test Sex valueOf java lang String  public static test Sex   test Sex values     These are all public methods that  sex  class has  They are not in the source code  javac exe added them  Notes     never use sex as a class name  it s difficult to read your code  we use Sex in Java when facing a Java puzzle like this one  I recommend to use a bytecode decompiler tool  I use Andrey Loskutov s bytecode outline Eclispe plugin   This will show all what s inside a class

User · Answer

You can t see this method in javadoc because it s added by the compiler   Documented in three places      Enum Types  from The Java Tutorials      The compiler automatically adds some special methods when it creates   an enum  For example  they have a static values method that returns an   array containing all of the values of the enum in the order they are   declared  This method is commonly used in combination with the   for-each construct to iterate over the values of an enum type     Enum valueOf class The special implicit values method is mentioned in description of valueOf method       All the constants of an enum type can be obtained by calling the implicit public static T   values   method of that type     Enum Types  Section 8 9  Java Language Specification   The values function simply list all values of the enumeration

[java] Where is the documentation for the values() method of Enum?

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