Initialization of an ArrayList in one line

Question

I wanted to create a list of options for testing purposes. At first, I did this:

ArrayList places = new ArrayList();
places.add(\         


        

Answer 1

Collection literals didn't make it into Java 8, but it is possible to use the Stream API to initialize a list in one rather long line:

List places = Stream.of("Buenos Aires", "Córdoba", "La Plata").collect(Collectors.toList());

If you need to ensure that your List is an ArrayList:

ArrayList places = Stream.of("Buenos Aires", "Córdoba", "La Plata").collect(Collectors.toCollection(ArrayList::new));