Question

Calendar Program

Write a program to design an appointment calendar. An appointment includes a description, date, starting time, and ending time. Supply a user interface to add appointments, remove canceled appointments, and print out a list of appointments for a particular day.   Appointments should not be duplicated for a given time and date.

Include a class AppointmentMenu to print the menu to the screen and accept user input. AppointmentMenu creates an AppointmentCalendar and then calls the appropriate methods to add, cancel, show, or quit.

Include a class AppointmentCalendar that is not coupled with the Scanner or PrintStream classes. (In other words, all println statements should be in AppointmentMenu.) AppointmentCalendar will include an arrayList of Appointments, a method to add Appointments, a method to cancel Appointments, and return the Appointments for a selected day.

Include a class Appointments which holds the input of description, date, and time. It should have a method to format the output for printing by the AppointmentMenu, a method to check to see if two appointments are equal so an appointment is not duplicated for a given date and time, and a method to check for a certain date when show and cancel are called.   

Be sure to include any other methods including any accessor methods that you need to complete this program using the design process described in Chapter 12.

Your main class should be called AppointmentSystem. Use the code below:

/**
 A system to manage appointments.
*/
public class AppointmentSystem { 
   public static void main(String[] args) {
      AppointmentMenu menu = new AppointmentMenu();
      menu.run();
   }
}

Here is a sample program run. (bold items are sample user inputs).

A)dd  C)ancel  S)how  Q)uit
A
Appointment (Description Date From To)
Dentist 
01/10/2007 
17:30 
18:30

A)dd  C)ancel  S)how  Q)uit
A
Appointment (Description Date From To)
Sweets Cafe 
01/10/2007
19:00 
20:00

A)dd  C)ancel  S)how  Q)uit
A
Appointment (Description Date From To)
CS1 class 
02/10/2007
08:30 
10:00

A)dd  C)ancel  S)how  Q)uit
S
Show appointments for which date?
01/10/2007
Appointments:
Dentist 01/10/2007 17:30 18:30
Sweets Cafe 01/10/2007 19:00 20:00

A)dd  C)ancel  S)how  Q)uit
C
Cancel appointments on which date?
01/10/2007
1) Dentist 01/10/2007 17:30 18:30
2) Sweets Cafe 01/10/2007 19:00 20:00
Which would you like to cancel? 
1

A)dd  C)ancel  S)how  Q)uit
S
Show appointments for which date?
01/10/2007
Appointments:
Sweets Cafe 01/10/2007 19:00 20:00

A)dd  C)ancel  S)how  Q)uit
A
Appointment (Description Date From To)
Sweets Cafe 
01/10/2007
19:00 
20:00
This appointment already exists.

A)dd  C)ancel  S)how  Q)uit
Q

How do I write this program in JAVA not C++ ? Thanks

Also DON'T

import java.io.IOException;

import java.sql.SQLException;

I can only import the scanner class, and ArrayLists and Arrays

What I've done so far is

/**
A system to manage appointments.
*/
public class AppointmentSystem {

public static void main(String[] args) {

AppointmentMenu menu = new AppointmentMenu();

menu.run();
}
}

import java.util.Scanner;
public class AppointmentMenu extends AppointmentCalendar{

public void run(){
Scanner in = new Scanner(System.in);

System.out.println("A)dd C)ancel S)how Q)uit");

String choice = in.nextLine(); {


if (choice.equalsIgnoreCase("A")){
super.addApt();
System.out.println("Appointment(Description Date From To)");
}


if (choice.equalsIgnoreCase("C")){
super.cancelApt();
System.out.println("Cancel appointments on which date?");
}


if (choice.equalsIgnoreCase("S")){
super.showApt();
System.out.println("Show appointments for which date?");
}


if (choice.equalsIgnoreCase("Q"))
return;


}




}

}

import java.util.ArrayList;

public class AppointmentCalendar extends Appointments{
private ArrayList<String[]> appointments = new ArrayList<String[]>();

public void addApt(){

}

public void cancelApt(){

}

public void showApt(){

}




}

import java.util.ArrayList;
import java.util.Scanner;

public class Appointments {

private ArrayList<String[]> description = new ArrayList<String[]>();
private ArrayList<String[]> dates = new ArrayList<String[]>();
private ArrayList<String[]> times = new ArrayList<String[]>();




}

Answer 1

AppointmentSystem.java

/**
* A system to manage appointments.
*/
public class AppointmentSystem
{
   public static void main(String[] args)
   {
       AppointmentMenu menu = new AppointmentMenu();
       menu.run();
   }
}

AppointmentMenu.java

import java.util.List;
import java.util.Scanner;

public class AppointmentMenu
{
   private static final String[] MENU_OPTIONS = { "Add", "Cancel", "Show", "Quit" };
   private static final int ADD_INDEX = 0;
   private static final int CANCEL_INDEX = 1;
   private static final int SHOW_INDEX = 2;
   private static final int QUIT_INDEX = 3;
  
   private AppointmentCalendar calendar;
   private UIHandler uih;
  
   /**
   * Initialize the objects used in the program.
   */
   private void init()
   {
       calendar = new AppointmentCalendar();
       uih = new UIHandler(new Scanner(System.in), System.out);
   }
  

   public void run()
   {
       init();
      
       // Put the program in a main loop so that the program keeps running until the user quits.
       boolean shouldContinue = true;
       while (shouldContinue)
       {
           // Get user input
           int result = uih.getChoice(MENU_OPTIONS);
          
           // Split cases for user input.
           if (result == ADD_INDEX) {
               addAction();
           }
           else if (result == CANCEL_INDEX) {
               cancelAction();
           }
           else if (result == SHOW_INDEX) {
               showAction();
           }
           else if (result == QUIT_INDEX) {
               // User requested to quit, change shouldContinue to false.
               shouldContinue = false;
           }
          
           // Add spacing
           uih.display("");
       }
   }
  
   // All the related prompts for adding an appointment.
   private static final String ADD_PROMPT = "Appointment (Description Date From To)";
   private static final String APPOINTMENT_ALREADY_EXISTS = "This appointment already exists.";
  
   /**
   * Handles interaction with the user when the user requests to add a appointment.
   */
   private void addAction()
   {
       // User inputs 4 lines:description, date, start, end.
       String[] input = uih.getInput(ADD_PROMPT, 4);
      
       // The addAppointment method in AppointmentCalendar does not add and returns false if the appointment already exists. We can
       // use that.
       if (!calendar.addAppointment(new Appointments(input[0],input[1], input[2], input[3])))
       {
           uih.display(APPOINTMENT_ALREADY_EXISTS);
       }
      
       // Method returns, control goes back to run.
   }
  
   // All the related prompts for canceling an appointment.
   private static final String CANCEL_PROMPT = "Cancel appointments on which date?";
   private static final String CANCEL_INDEX_REQUEST = "Which would you like to cancel?";
   private static final String INDEX_OUT_OF_BOUNDS_MSG = "The index entered is not in the list. No appointment is cancelled.";
  
  
   private void cancelAction()
   {
       // Get the date of the appointment from user
       String date = uih.getInput(CANCEL_PROMPT);
      
       // Get all the appointments on that date.
       List<Appointments> allApps = calendar.findAppointmentOnDate(date);
       // Display the appointments.
       for (int i = 0; i < allApps.size(); i++)
       {
           uih.display(Integer.toString(i + 1) + ") " + allApps.get(i).toString());
       }
      
       // Ask which appointment to cancel.
       String input = uih.getInput(CANCEL_INDEX_REQUEST);
       int index = Integer.parseInt(input) - 1;
      
       // Prevent index out of bounds error.
       if (index < 0 || index >= allApps.size()) {
           uih.display(INDEX_OUT_OF_BOUNDS_MSG);
           return;
       }
      
       // Cancel the appointment.
       calendar.cancelAppointment(allApps.get(index));
   }
  
   // All the related prompts for showing appointments.
   private static final String SHOW_PROMPT = "Show appointments for which date?";
   private static final String SHOW_HEAD = "Appointments:";
  
   /**
   * Handles interaction with the user when the user requests to show appointments.
   */
   private void showAction()
   {
       // Get the date of the appointment from user
       String date = uih.getInput(SHOW_PROMPT);
      
       // Get all the appointments on that date.
       List<Appointments> allApps = calendar.findAppointmentOnDate(date);
       // Display the appointments.
       uih.display(SHOW_HEAD);
       for (int i = 0; i < allApps.size(); i++)
       {
           uih.display(allApps.get(i).toString());
       }
   }
}

AppointmentCalendar.java

import java.util.ArrayList;
import java.util.List;

public class AppointmentCalendar
{
   private List<Appointments> appointmentList;
  
   public AppointmentCalendar()
   {
       appointmentList = new ArrayList<Appointments>();
   }
  

   private boolean hasAppointment(Appointments app)
   {
       for (Appointments appointment : appointmentList)
       {
           if (appointment.equals(app))
           {
               // Appointment already exists.
               return true;
           }
       }
      
       return false;
   }
  
  
   public boolean addAppointment(Appointments app)
   {
       if (hasAppointment(app)) {
           // Already has this appointment
           return false;
       }
      
       // Doesn't have this appointment
       appointmentList.add(app);
       return true;
   }
  
   /**
   * Cancels an appointment from the calendar.
   *
   * @param app The appointment to cancel.
   */
   public void cancelAppointment(Appointments app)
   {
       // Search through the list and find the
       for (int i = 0; i < appointmentList.size(); i ++)
       {
           if (app.equals(appointmentList.get(i))) {
               // This is the appointment to cancel.
               appointmentList.remove(i);
               return;
           }
       }
   }
  
  
   public List<Appointments> findAppointmentOnDate(String date)
   {
       // The list to store the appointments.
       List<Appointments> appsOnDate = new ArrayList<Appointments>();
      
       // Go through the list and find all appointments with hte same date.
       for (Appointments app : appointmentList)
       {
           if (app.isOnDate(date)) {
               appsOnDate.add(app);
           }
       }
      
       return appsOnDate;
   }
}

Appointments.java

public class Appointments
{
   private String description;
   private String date;
   private String startTime;
   private String endTime;
  
   public Appointments(String desc, String appointmentDate, String start, String end)
   {
       description = desc;
       date = appointmentDate;
       startTime = start;
       endTime = end;
   }
  

   public boolean isOnDate(String onDate)
   {
       return date.equals(onDate);
   }
  
   // If all four instance fields are equal, the appointments are equal.
   public boolean equals(Object obj)
   {
       if (obj instanceof Appointments)
       {
           // The object is of this class and we can check the instance fields.
           Appointments app = (Appointments) obj;
           return (description.equals(app.description) && date.equals(app.date) && startTime.equals(app.startTime) && endTime
                   .equals(app.endTime));
       }
      
       // The object is not even of this class. The two are not equal.
       return false;
   }
  
   @Override
   public String toString()
   {
       return (description + " " + date + " " + startTime + " " + endTime);
   }
  
}

UIHandler.java

import java.io.PrintStream;
import java.util.Scanner;

public class UIHandler
{
   private static final String UNKNOWN_RESPONSE = "Unknown command: ";
  
   private Scanner in;
   private PrintStream out;
  
  
   public UIHandler(Scanner input, PrintStream output)
   {
       in = input;
       out = output;
   }
  
   /**
   * Display something to the user.
   *
   * @param content The content to display
   */
   public void display(String content)
   {
       // I can also redirect this to the getInput method.
       getInput(content, 0);
   }
  
  
   public String getInput(String prompt)
   {
       // Redirect to the more general method
       return getInput(prompt, 1)[0];
   }
  
  
   public String[] getInput(String prompt, int linesExpected)
   {
       // Prompt the user.
       out.println(prompt);
      
       // Get the user input.
       String[] userInput = new String[linesExpected];
       for (int i = 0; i < linesExpected; i++) {
           userInput[i] = in.nextLine();
       }
      
       return userInput;
   }
  
  
   public int getChoice(String[] options)
   {
       // Have an array that stores the keys for faster access.
       int length = options.length;
       String[] keyArray = new String[length];
      
       // Print the options, and then start a new line for user input.
       for (int i = 0; i < length; i++)
       {
           // Form the options menu that is for display.
           String opt = options[i];
           String disp = opt.substring(0, 1) + ")" + opt.substring(1);
           out.print(disp + " ");
           // Also save the key for later use.
           keyArray[i] = opt.substring(0, 1);
       }
      
       // Accept user input.
       String input = getInput(""); // Use empty prompt
      
       // Find the matching key.
       for (int i = 0; i < keyArray.length; i++)
       {
           if (keyArray[i].equals(input)) {
               // User input matches this key, return the index.
               return i;
           }
       }
      
       // If the function haven't returned yet, the input does not match any known command.
       out.println(UNKNOWN_RESPONSE + input);
       return -1;
   }
}