Filling a List with all enum values in Java

I wouldn't use a List in the first places as an EnumSet is more approriate but you can do

List<Something> somethingList = Arrays.asList(Something.values());

List<Something> somethingList =
                 new ArrayList<Something>(EnumSet.allOf(Something.class));

There is a constructor for ArrayList which is

ArrayList(Collection<? extends E> c)

Now, EnumSet extends AbstractCollection so you can just do

ArrayList<Something> all = new ArrayList<Something>(enumSet)

Class.getEnumConstants()

List<SOME_ENUM> enumList = Arrays.asList(SOME_ENUM.class.getEnumConstants());

Related