Below are the list of all available methods for ArrayList. List is an interface , ArrayList is a class that implements List. Include the sort() method for sorting lists alphabetically or numerically.Answer is very simple. For example: An API method takes an array as argument or returns an array You need to work with primitives for performance reasonsArrayList and Vectors both implement the List interface and both use (dynamically resizable) arraysВ for its internal data structure, much like using an ordinary array.The difference between a built-in array and an ArrayList in Java, is that the. When to use which Sometimes you must use an array. Java: Arrays vs ArrayLists (and other Lists) An array (something like int) is a built in type while ArrayList is a regular class part of the Java standard library.

Synchronization:В Vector isВ synchronized, which means only one thread at a time can access the code, while ArrayList isВ not synchronized, which means multiple threads can work on ArrayList at the same time. List is an interface where ArrayList is concrete implementation, so List is.Major Differences between ArrayList and Vector: // asList () returns a fixed-size list backed by the specified array.In this post, we will see the difference between List and ArrayList in Java.

If we donвЂ™t have any explicit requirements for using either of them, we use ArrayList over vector. ArrayList is newer and faster. If we donвЂ™t know how much data we are going to have, but know the rate at which it grows, Vector has an advantage, since we can set the increment value in vectors. Therefore, in a single-threaded case, ArrayList is the obvious choice, but where multithreading is concerned, vectors are often preferable.

Java List Vs Array Vs Arraylist