May 13, 2009 · List<String> list = new ArrayList<>(); This is how to create a LinkedList in java, If you need to do frequent insertion/deletion of elements on the list, you should use LinkedList …

Nov 15, 2012 · List is an Interface, you cannot instantiate an Interface, because interface is a convention, what methods should have your classes. In order to instantiate, you need some …

Oct 5, 2017 · @Sandy Chapman: List.of does return some ImmutableList type, its actual name is just a non-public implementation detail. If it was public and someone cast it to List again, …

Being somewhat new to the Java language I'm trying to familiarize myself with all the ways (or at least the non-pathological ones) that one might iterate through a list (or perhaps other collection...

Jun 17, 2009 · List<String> places2 = Collections.singletonList("Buenos Aires"); This would mean that places2 is immutable (trying to change it in any way will cause an …

I'm trying to read a CSV file into a list of lists (of strings), pass it around for getting some data from a database, build a new list of lists of new data, then pass that list of lists so it can be

Jan 29, 2009 · List<String> L = new ArrayList<String>(); You should read that as "L is a kind of List that deals with String objects". When you start dealing with Factory classes, it is critical to …

The notation List<?> means "a list of something (but I'm not saying what)". Since the code in test works for any kind of object in the list, this works as a formal method parameter. Using a type …

Oct 10, 2008 · Avoid Apache Commons Collections. It’s not typesafe, there are no generics. Great if you use Java 1.4, but for Java 5 and above, I’d prefer Google Guava.

Aug 2, 2013 · Is there a way to create a list of primitive int or any primitives in java No you can't. You can only create List of reference types, like Integer, String, or your custom type. It seems I …