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

If you need a simple list of size 1:

List strings = new ArrayList(Collections.singletonList("A"));

If you need a list of several objects:

List strings = new ArrayList();
Collections.addAll(strings,"A","B","C","D");