Reversing a Number and a String using JAVA

The Java code is right here to reverse the stuffs.

import java.util.Scanner;
import java.io.BufferedReader;
import java.io.InputStreamReader;
public class Reverse {
    public static void main(String args[]) throws Exception {
        BufferedReader br = new BufferedReader(new InputStreamReader(System. in ));
        System.out.println("1-Want to reverse a number..?");
        System.out.println("2-Want to reverse a string..?");
        System.out.println();
        System.out.print("Select any option: ");
        int select = Integer.parseInt(br.readLine());
        switch (select) {
            case 1:
                int n, reverse = 0;
                System.out.print("Enter the number to reverse: ");
                Scanner in = new Scanner(System. in );
                n = in .nextInt();
                while (n != 0) {
                    reverse = reverse * 10;
                    reverse = reverse + n % 10;
                    n = n / 10;
                }
                System.out.println("Reversed number is: " + reverse);
                break;
            case 2:
                String str, reverse1 = "";
                Scanner input = new Scanner(System. in );
                System.out.print("Enter a string to reverse: ");
                str = input.nextLine();
                int length = str.length();
                for (int i = length - 1; i >= 0; i--)
                reverse1 = reverse1 + str.charAt(i);
                System.out.println("Reversed string is: " + reverse1);
                break;
            default:
                System.out.println("Wrong choice :(");
        }
    }
}