Collection Framework in Java - #5 - ArrayList Class Overview

In this video, we will take a look at the ArrayList class overview and we will discuss important points about ArrayList in Java. Following are few key points to note about ArrayList in Java - An ArrayList is a re-sizable array, also called a dynamic array. It grows its size to accommodate new elements and shrinks the size when the elements are removed. ArrayList internally uses an array to store the elements. Just like arrays, It allows you to retrieve the elements by their index. Java ArrayList allows duplicate and null values. Java ArrayList is an ordered collection. It maintains the insertion order of the elements. You cannot create an ArrayList of primitive types like int, char etc. You need to use boxed types like Integer, Character, Boolean etc. Java ArrayList is not synchronized. If multiple threads try to modify an ArrayList at the same time, then the final outcome will be non-deterministic. You must explicitly synchronize access to an ArrayList if multiple threads are gonna modify it. Complete playlist of Java Collections Framework in Depth at https://youtube.com/playlist?list=PLGRDMO4rOGcNpAJPtuuCOPXvI39Elxa-c #java #collections #javaguides