#arraylist in java

Define List In Java

In Java,  A List is an ordered collection of an object in which values can be stored. It allows insertion, delete, update and positional access elements in list with index number. List created by the following classes(ArrayList, LinkedList , Stack, Vector).

The list method is found in java.util.List package. using this package  we can iterate list in forward and backward directions. The implementation of classes of list are ArrayList, LinkedList, Stack, vector. The arrayList and linkedList are widly uesd in java. The vector class is deprecated scince java5 

How to create a List in JAVA

Implementation of Array List:-

Syntax: List<String> lst1=New ArrayList<>();

Implementation of Linked List:-

Syntax: List<String> lst2=new LinkedList<>();

Different types of Methods of List in Java.

Some of List methods are commonly used in java are:

add() - It is used to add new Element in a list.

addAll()- It is used for add all elements of a list to a new list.

get() - It is used to access any element in a list.

Java: ArrayList Vs Vector Class

java.util.ArrayList and java.util.Vector both implements List interface and maintains insertion order. It’s having many differences as below:

ArrayList vs Vector ArrayList Vector ArrayList is not synchronized. Vector is synchronized. ArrayList increases 50% of the current array size if the number of elements exceeds its capacity. Vectorincrease 100% means doubles the array size when the…

What is an ArrayList ?

  ArrayList is a resizable implementation of the List interface.

An ArrayList internally uses an array to store its elements.

  Already have good understanding of ArrayList ?

  Let’s go through some puzzles to test your understanding :

  Java Quiz 31 : Puzzle on removing element from an arraylist

Java Quiz 32 : Puzzle on removing arraylist elements with duplicates

Java Quiz…