Write a JAVA program to read n strings & insert into ArrayList collection. Display the elements of collection in reverse order.

import java.util.*;
import java.io.*;

class arraystr
{
public static void main(String ar[]) throws Exception
{
ArrayList a = new ArrayList();

                System.out.println("Initial Size: " + a.size());
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter No Of Elements To Be Inserted");
int no = Integer.parseInt(br.readLine());

System.out.println("Enter String");
  for(int j = 0; j<no; j++)
{
String str;
str = br.readLine();
a.add(str);
}

System.out.println("\nFinal Size: " + a.size());

System.out.println("\nThe Contents Of The Array List Are: "+ a);

Object ob[] = new Object[a.size()];
ob = a.toArray();

System.out.println("\nContents In Normal Order: ");

for(int i = 0; i < ob.length; i++)
{
System.out.println("" + (String) ob[i]);
}


System.out.println("\nContents In Reverse Order: ");


for(int i = (ob.length)-1; i>=0; i--)
{
System.out.println(""+(String) ob[i]);
}



}
}