Array list Java

A list in Java is an interface and there are many list types that implement this interface . I will use ArrayList in the first few examples, because it is the most commonly used type of list. ArrayList is basically a resizable array.

An import statement tells Java which class you mean when you use a short name (like List ) . It tells Java where to find the definition of that class. You can import just the classes you need from a package as shown below. Just provide an import statement for each class that you want to use.

There are two types of import Explicit & Implicit , well what is import and why do we need to use in our java source code? When we use predefined java classes in our java code then we need to load that class by the using import keyword at the very first line of our program.