How do I enter parameters for an ArrayList in BlueJ?

Question

In BlueJ, if I write a method that takes an array as a parameter, then when I want to test that method with a method call I have to enter the elements with curly braces, so:

Answer 1

Arrays.asList("1", "2", "3");

Will return a List and not a ArrayList.

Your methods' parameters should always be the interface and not the implementation.