How to add element (field) to ArrayList right after initialization?

Question

Java

How to add an element (field) to an ArrayList as soon as it is initialized?

contactList.put(Name, new ArrayList<AdapterRowItem>());
contactList.get(Name).add(item);

You need to add one element at once (AdapterRowItem) item; not to call get on the HashMap.

Answer 1

new ArrayList(Arrays.asList(item));

Answer 2

You can also use new ArrayList<>() {{add(item);}}

Answer 3

Are you sure that in this case you need to put the question like this?
Judging by the use-case, you write a bike: Multimap.
docs.guava-libraries.googlecode.com/git/javadoc/co...