Question

Assume all methods in the Stack class are available to you, request from the user a set of numbers (terminated by -1) and print them in reverse order . write code in java.

Answer 1

Explanation:

Here is the code which creates a Stack s and then push all the elements entered by the user until the user presses -1 , to the stack.

Then, it keeps popping the elements one by one and they get printed in the reverse direction.

Code:

import java.util.Stack;
import java.util.Scanner;
public class Main
{
   public static void main(String[] args) {
      
       Scanner sc = new Scanner(System.in);
       Stack<Integer> s = new Stack<Integer>();
      
       while(true)
       {
       System.out.print("Enter Number: ");
       int n = sc.nextInt();
      
       if(n==-1)
       break;
      
       s.push(n);
       }
      
      
       while(!s.empty())
       {
       System.out.print(s.peek()+" ");
      
       s.pop();
       }
      
      
   }
}

Output:

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