Oct 1, 2008 · Note that the returned type for asList() is a List using a concrete ArrayList implementation, but it is NOT java.util.ArrayList. It's an inner type, which emulates an ArrayList but actually directly …

Jun 17, 2009 · ArrayList<String> list = new ArrayList<String>() {{ add("A"); add("B"); add("C"); }}; However, I'm not too fond of that method because what you end up with is a subclass of ArrayList …

Assuming that I have a class named Class, And I would like to make a new ArrayList that it's values will be of type Class. My question is that: How do I do that? I can't understand from Java Api...

I am wanting to create an array of arraylist like below: ArrayList<Individual> [] group = new ArrayList<Individual> () [4]; But it's not compiling. How can I do this?

Mar 15, 2010 · I know that ArrayList isn't synchronized and thus isn't thread-safe. I tried using the Collections.synchronizedCollection (c Collection) method by passing in a new ArrayList and …

Sep 8, 2011 · List<String> list = ArrayList<String>(Arrays.asList("hello")); we can reduce the number of ArrayList objects being created from 2 to 1. asList method creates and returns an ArrayList Object. …

May 7, 2012 · System.out.println("Arraylist contains: " + arl.toString()); If you want to access the i element, where i is an index from 0 to the length of the array-1, you can do a :

Nov 24, 2016 · This contrasts to calling ArrayList.clone(), which performs a shallow copy of the List. In this context a shallow copy creates a new List instance but containing references to the original objects.

To get a mutable list you can wrap the returned list in a new ArrayList as a couple of answers point out, but a cleaner solution is to use Guava's Lists.newArrayList () (available since at least Guava 10, …

Mar 1, 2009 · I have an ArrayList that I want to output completely as a String. Essentially I want to output it in order using the toString of each element separated by tabs. Is there any fast way to do this? You …