Filling a List with all enum values in Java

Question

I would like to fill a list with all possible values of an enum Since I recently fell in love with EnumSet  I leveraged allOf    EnumSet lt Something gt  all   EnumSet allOf  Something class   List lt Something gt  list   new ArrayList lt  gt   all size     for  Something s   all        list add  s     return list    Is there a better way  as in non obfuscated one liner  to achieve the same result

User · Answer

private ComboBox gender  private enum Selgender Male Famle   ObservableList lt Object gt  observableList   FXCollections observableArrayList Selgender values

User · Answer

There is a constructor for ArrayList which is  ArrayList Collection lt   extends E gt  c     Now  EnumSet extends AbstractCollection so you can just do  ArrayList lt Something gt  all   new ArrayList lt Something gt  enumSet

User · Answer

Try this         new ArrayList lt Something gt  EnumSet allOf Something class      as ArrayList has a constructor with Collection lt   extends E gt   But use this method only if you really want to use EnumSet   All enums have access to the method values    It returns an array of all enum values         Arrays asList Something values

User · Answer

This is a bit more readable   Object   allValues   all getDeclaringClass   getEnumConstants

User · Answer

You can use also   Collections singletonList Something values

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try  enum E       E1  E2  E3    public static void main String   args  throws Exception       List lt E gt  list   Arrays asList E values         System out println list

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List lt Something gt  result   new ArrayList lt Something gt  all     EnumSet is a Java Collection  as it implements the Set interface   public interface Set lt E gt  extends Collection lt E gt     So anything you can do with a Collection you can do with an EnumSet

User · Answer

I wouldn t use a List in the first places as an EnumSet is more approriate but you can do  List lt Something gt  somethingList   Arrays asList Something values       or  List lt Something gt  somethingList                    new ArrayList lt Something gt  EnumSet allOf Something class

User · Answer

Class getEnumConstants    List lt SOME ENUM gt  enumList   Arrays asList SOME ENUM class getEnumConstants

[java] Filling a List with all enum values in Java

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