Array List in Java | Quick Tutorial | All Methods & Functions #arraylist

In Java, an ArrayList is a dynamic, resizable implementation of the List interface provided by the Java Collections Framework. It is a class that extends the AbstractList class and implements the List interface.

An ArrayList stores elements of any type in a contiguous memory location, similar to an array. However, unlike regular arrays, an ArrayList can grow or shrink dynamically as elements are added or removed. This flexibility makes it convenient when you need a resizable collection of elements.

ArrayList in Java provides several functions/methods to manipulate and work with the elements stored in the list. Here are some commonly used functions:

add(E element): Appends the specified element to the end of the ArrayList.

add(int index, E element): Inserts the specified element at the specified position in the ArrayList, shifting the subsequent elements to the right.

get(int index): Returns the element at the specified index in the ArrayList.

set(int index, E element): Replaces the element at the specified index in the ArrayList with the specified element.

remove(int index): Removes the element at the specified index from the ArrayList, shifting the subsequent elements to the left.

remove(Object obj): Removes the first occurrence of the specified element from the ArrayList, if it is present.

size(): Returns the number of elements in the ArrayList.