Arraylist

ArrayList

Is a resizable array-like data structure in programming, most commonly associated with Java.

ArrayList

It allows you to store elements in an ordered collection, and unlike a regular array, its size can grow or shrink dynamically as you add or remove elements.

add(E element)

Adds an element to the end of the list.

add(int index, E element)

Inserts an element at a specified index.

get(int index)

Returns the element at a specified index.

set(int index, E element)

Replaces the element at a specified index with a new element.

remove(int index)

Removes the element at a specified index.

remove(Object o)

Removes the first occurrence of a specified object from the list.

size()

Returns the number of elements in the list.

isEmpty()

Checks if the list is empty.

contains(Object o)

Checks if the list contains a specified object.

ArrayList

Specifies that you are creating an instance of
the ArrayList class.

<DataType>

This is the "diamond operator" and specifies the type of elements that the ArrayList will hold.