A collection is an object that groups multiple elements into a single unit. Collections are used to store, retrieve, manipulate, and communicate aggregate data.
List is an interface that defines a collection of elements in a specific order.
In Java, an
ArrayList is a class that is part of the Java
collection Framework and can be found in the
java.util package. It implements the
List interface and provides a resizable array implementation of the
It is used to store a dynamically sized collection of elements. Unlike arrays, which are fixed in size.