Java ArrayList Class - How to Create an ArrayList and Add Remove Clear Array Elements - APPFICIAL

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Working with arrays can be difficult because they have a fixed size, and it’s not so easy to add or remove items. Java provides a class called ArrayList that provides many useful methods for dealing with a collection of data. An ArrayList is an abstract data type (ADT) implemented as a generic class, and supports different data. types. ArrayLists are declared as follows, where T is the ArrayLists’s type.

Here are some commonly used ArrayList methods:

add (T element) - Adds a new element to the ArrayList
remove (T element) Removes the first occurrence of the element
get (int index) - Return the element at the specified index
set (int index, T element) - Replace the element at the specified index with the new element
size() - Returns the number of elements in the ArrayList
isEmpty() - Returns true if the arrayList size is 0, false otherwise
clear() - Removes all elements from the ArrayList

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Great video. I was looking for something clear and concise with arraylist and this has to be one of the best videos I have happened across. My only wish was that is dug a bit deeper into adding and removing elements and sorting without the use of the sort method. It has to do with a homework assignment that I just don't get. But thanks anyways because it still a very good little video.

necrostalker

I love this video! short and concise, greeting from Chile

PrettyShooter

Can you also consider ArrayList as an object since it is capitalized?

KelsoQuan

Bro U have given one word in a row so how to add all the words in a single column in one array? Please tell

ajaysharan

Ok, but how do you add your own abstract data type?

AdamG

Java ArrayList Class - How to Create an ArrayList and Add Remove Clear Array Elements - APPFICIAL

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