Question

Using java

use a while loop

use JOptionPane

Scenario – You go to an arcade with 100 tokens, and each game costs a variable number of tokens. Before the loop begins, display how many tokens you have available. Inside the loop, ask the user how many tokens does the next game cost, and subtract that amount from the total tokens if it is less than or equal to the total tokens. Then, state how many tokens are still left.

Answer 1

Here is the completed code for this problem. Comments are included, go through it, learn how things work and let me know if you have any doubts or if you need anything to change. If you are satisfied with the solution, please rate the answer. Thanks

// Arcade.java

import javax.swing.JOptionPane;

public class Arcade {

      public static void main(String[] args) {

            // initializing tokens to 100

            int tokens = 100;

            // displaying a message showing tokens before game begins

            JOptionPane.showMessageDialog(null, "You have " + tokens

                        + " tokens, the game is about to start");

            // loops as long as there is a token available

            while (tokens > 0) {

                  try {

                        //reading number of tokens using an input dialog box

                        int num = Integer

                                    .parseInt(JOptionPane

                                                 .showInputDialog("How many tokens does the next game cost? ("

                                                             + tokens + " available)"));

                        //checking if number exceeds the available tokens

                        if (num > tokens) {

                              //displaying error message

                              JOptionPane.showMessageDialog(null,

                                           "Sorry, that's more than what you have!");

                        } else {

                              //subtracting num from tokens

                              tokens -= num;

                        }

                  } catch (Exception e) {

                        //non numeric input

                        JOptionPane.showMessageDialog(null,

                                    "Sorry, that's an invalid input!");

                  }

            }

            //after exiting loop, displaying a good bye greeting.

            JOptionPane.showMessageDialog(null,

                        "You have no tokens left, thank you for playing!");

      }

}

/*OUTPUT (partial)*/