Java ArrayList class

Java ArrayList class uses a dynamic array for storing the elements.It extends AbstractList class and implements List interface.
Java ArrayList class can contain duplicate elements.
Java ArrayList class maintains insertion order.
Java ArrayList class is non synchronized.
Java ArrayList allows random access because array works at the index basis.
In Java ArrayList class, manipulation is slow because a lot of shifting needs to be occurred if any element is removed from the array list.

Syntax :

[java]
ArrayList<String> al=new ArrayList<String>();
[/java]

Example

[java]
import java.util.ArrayList;

public class ArrayListExample {
public static void main(String[] args)
{
ArrayList<String> al=new ArrayList<String>();
al.add("Amol");
al.add("Rahul");
al.add("Vaishali");
al.add("Renuka");
al.add("Prachi");
al.add("Deepak");
System.out.println(al);
for (int i=0;i<al.size();i++)
System.out.println(al.get(i));
}
} [/java]

Important points.

To add elements in ArrayList use method add() e.g. arraylist.add(element).
To get size of the ArrayList use method size() e.g. arraylist.size()
To get any element of the ArrayList use method get() e.g. arraylist.get(index)