Question

Write a java program that uses a stack to reverse an integer of three digits. The program must prompt the user to input an integer of 3 digits and display it in reverse.

Answer 1

Answer:

import java.util.*;  

class Main {

 public static void main(String[] args) {

   Scanner sc = new Scanner(System.in);

   System.out.print("Enter a number: ");

   String str = sc.nextLine();

   System.out.print("You have entered: " + str + "\n");

   Stack stk = new Stack();  

   for (int i = 0; i < str.length(); i++) {

     stk.push(str.charAt(i));

   }

   String reversed = "";

   while(!stk.empty()) {

     reversed += stk.pop();

   }

   System.out.print("Reversed this is: " + reversed + "\n");

 }

}

Explanation:

This solution works for all types of input of all lengths.

If needed you could rework it for just integers.