Question

a. Write an application for Cody's Car Care Shop that shows a user a list of available services: oil change, tire rotation, battery check, or brake inspection. Allow the user to enter a string that corresponds to one of the options, and display the option and its price as $25, $22, $15, or $5, accordingly. Display an error message if the user enters an invalid item. Save the file as CarCareChoice.java.

b. It might not be reasonable to expect users to type long entries such as "oil change" accurately. Modify the CarCareChoice class so that as long as the user enters the first three characters of a service, the choice is considered valid. Save the file as CarCareChoice2.java.

Java Programming 8th Edition

Chapter 8 Exercise 3a-b

Answer 1

import java.util.Scanner;

public class CarCareChoice {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Available services: oil change, tire rotation, battery check, or brake inspection");
        System.out.print("Select one of the service above: ");
        String service = scanner.nextLine();
        if(service.equalsIgnoreCase("oil change")){
            System.out.println("Price for "+service+" is $25");
        }
        else if(service.equalsIgnoreCase("tire rotation")){
            System.out.println("Price for "+service+" is $22");
        }
        else if(service.equalsIgnoreCase("battery check")){
            System.out.println("Price for "+service+" is $15");
        }
        else if(service.equalsIgnoreCase("brake inspection")){
            System.out.println("Price for "+service+" is $5");
        }
        else{
            System.out.println("Invalid service");
        }
            
    }
}

////////////////////////////////////////////////////////////////////////

import java.util.Scanner;

public class CarCareChoice2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Available services: oil change, tire rotation, battery check, or brake inspection");
        System.out.print("Select one of the service above: ");
        String service = scanner.nextLine();
        if(service.substring(0,3).equalsIgnoreCase("oil")){
            System.out.println("Price for "+service+" is $25");
        }
        else if(service.substring(0,3).equalsIgnoreCase("tir")){
            System.out.println("Price for "+service+" is $22");
        }
        else if(service.substring(0,3).equalsIgnoreCase("bat")){
            System.out.println("Price for "+service+" is $15");
        }
        else if(service.substring(0,3).equalsIgnoreCase("bra")){
            System.out.println("Price for "+service+" is $5");
        }
        else{
            System.out.println("Invalid service");
        }

    }
}