
How to make a new List in Java - Stack Overflow
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 …
What does List<?> mean in java generics? - Stack Overflow
Dec 4, 2009 · List is an interface you can implement yourself and also implemented by some of the Java collections, like Vector. You can provide compile-time typing information using the …
loops - Ways to iterate over a list in Java - Stack Overflow
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...
java - What is the difference between List.of and Arrays.asList ...
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, …
Java Generics: List, List<Object>, List<?> - Stack Overflow
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 …
arrays - Working with a List of Lists in Java - Stack Overflow
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
Java: convert List<String> to a join()d String - Stack Overflow
Nov 18, 2009 · 983 String.join With Java 8 you can do this without any third party library. If you want to join a Collection of Strings you can use the String.join () method:
How to search in a List of Java object - Stack Overflow
Oct 30, 2012 · I have a List of object and the list is very big. The object is class Sample { String value1; String value2; String value3; String value4; String value5; } Now I have to searc...
java - Create a List of primitive int? - Stack Overflow
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 …
java - What is the Simplest Way to Reverse an ArrayList ... - Stack ...
May 26, 2012 · final List<T> result = new ArrayList<>(list); Collections.reverse(result); return result; } This approach works, but requires iterating over the list twice. The copy constructor …