Compact syntax for instantiating an initializing collection

Don_2648 0
Viewed 82472

I'm looking for a compact syntax for instantiating a collection and adding a few items to it. I currently use this syntax:

Collection<String> collection = 
    new ArrayList<String>(Arrays.asList(new String[] { "1", "2", "3" }));

I seem to recall that there's a more compact way of doing this that uses an anonymous subclass of ArrayList, then adds the items in the subclass' constructor. However, I can't seem to remember the exact syntax.

initialization collections java
7 Answers

From JDK9 you can use factory methods:

List<String> list = List.of("foo", "bar", "baz");
Set<String> set = Set.of("foo", "bar", "baz");
user_2357150
Related