Java Program to Reverse the Given Number

import java.io.*;
 
class reverse{
 public static void main(String [] args) {
  try {
   BufferedReader obc=new BufferedReader (new InputStreamReader(System.in));
   int n,r;
   int rev=0;
   System.out.println("Enter the number: ");
   n=Integer.parseInt(obc.readLine());
   
   while(n>0) {
    r=n%10;
    rev=rev*10+r;
    n=n/10;
   }
 
   System.out.println("The reverse number is "+rev+".");
   
  } catch(IOException e) {
    System.out.println("Wrong number entered.");
  }
 }
}

Output of Above Java Program
Enter the number:
12345
The reverse number is 54321.