Answer:
An ArrayList class is a dynamic data structure, which can add and remove the data dynamically. It allows random access of the elements.
Below is the example of ArrayList. It performs addition, retrieval and deletion of elements from the ArrayList. We create generic list which accepts only String type value.
ArrayListDemo.java
import java.util.*;
class ArrayListDemo
{
public static void main(String[] args)
{
ArrayList<String> al = new ArrayList<String>();
System.out.println("Size of ArrayList: "+al.size());
//Adding the elements
al.add("Java");
al.add("JDBC");
System.out.println("Elements of first ArrayList: "+al);
ArrayList<String> al2 = new ArrayList<String>();
al2.add("EJB");
al2.add("Struts");
//Adding the both array
al2.addAll(al);
System.out.println("Elements of second ArrayList: "+al2);
//remove the element
al2.remove("EJB");
System.out.println("Elements of ArrayList after deletion: "+al2);
System.out.println("Size of ArrayList: "+al2.size());
//Retriving 2nd index element
System.out.println("The element at 2nd index is: "+al2.get(2));
}
}
Output:
