Chapter 11.2, Problem 7STQ

Revised version of getCount() method:

//Define the getCount() method

public void getCount()

{

    //Create an object for Scanner class

    Scanner keyboard = new Scanner(System.in);

    //Read the positive integer from user

    System.out.println("Enter a positive integer:");

    count = keyboard.nextInt();

/*Check whether the count is less than or equal to "0". */

    if (count <= 0)

    {

        //Display the error message

  System.out.println("Input must be positive.");

        //Read another input from user

        System.out.println("Try again.");

        count = keyboard.nextInt();

    }

}

Explanation:

The above highlighted code is the method definition for “getCount()”.

• Create an object for Scanner class.
• Read the positive integer from user.
• Check whether the count is less than or equal to “0”. If yes,
  • Display the error message.
  • Read another input from user using iterative manner instead of recursive call.

Complete program:

//Import the java packages

import java.util.Scanner;

//Define the class

public class CountDown

{

    //Declare the required variable

    private int count;

    //Define the main() method

    public static void main(String[] args)

    {

        //Create an object for CountDown class

        CountDown countDowner = new CountDown();

/*Call getCount() method to get the positive integer. */

        countDowner.getCount();

/*Call showCountDown() method to display the count down. */

        countDowner.showCountDown();

    }

    //Define the getCount() method

    public void getCount()

    {

        //Create an object for Scanner class

        Scanner keyboard = new Scanner(System...