Convert Enumeration to a Set List

Question

Is there some one-liner bridge method to dump a given Enumeration to java util List or java util Set  Something built-in like Arrays asList   or Collection toArray   should exist somewhere  but I m unable to find that in my IntelliJ debugger s evaluator window  and Google SO results  too

User · Accepted Answer

You can use Collections list   to convert an Enumeration to a List in one line   List lt T gt  list   Collections list enumeration     There s no similar method to get a Set  however you can still do it one line   Set lt T gt  set   new HashSet lt T gt  Collections list enumeration

User · Answer

There is a simple example of convert enumeration to list  for this i used   Collections list enum  method    public class EnumerationToList        public static void main String   args            Vector lt String gt  vt   new Vector lt String gt             vt add  java            vt add  php            vt add  array            vt add  string            vt add  c             Enumeration lt String gt  enm   vt elements            List lt String gt  ll   Collections list enm           System out println  List elements      ll              Reference   How to convert enumeration to list

User · Answer

How about this  Collections list Enumeration e  returns an ArrayList lt T gt

User · Answer

I needed same thing and this solution work fine  hope it can help someone also  Enumeration   array   Enumeration values    List lt Enumeration gt  list   Arrays asList array     then you can get the  name   of your enumeration

User · Answer

If you need Set rather than List  you can use EnumSet allOf     Set lt EnumerationClass gt  set   EnumSet allOf EnumerationClass class     Update  JakeRobb is right  My answer is about java lang Enum instead of java util Enumeration  Sorry for unrelated answer

User · Answer

When using guava  See doc  there is Iterators forEnumeration  Given an Enumeration x you can do the following   to get a immutable Set   ImmutableSet copyOf Iterators forEnumeration x      to get a immutable List   ImmutableList copyOf Iterators forEnumeration x      to get a hashSet   Sets newHashSet Iterators forEnumeration x

[api] Convert Enumeration to a Set/List

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