Question

Programming Assignment 6

Write a Java program that will implement a simple appointment book. The program should have three classes: a Date class, an AppointmentBook class, and a Driver class.

• You will use the Date class that is provided on Blackboard (provided in New Date Class example).

• The AppointmentBook class should have the following:

o A field for descriptions for the appointments (i.e. Doctor, Hair, etc.). This field should be an array of String objects.

o A field for the date of the appointments. This field should be an array of Date objects.

o A field to keep track of the number of appointments.

o A constant field for the maximum number of appointments (this field can be set to any value you like). This will be the size for each array created in the constructor.

o A constructor to create an “empty” appointment book of the appropriate size.

o A method to enter a single appointment.

o A method to sort the appointments by Date in ascending order.

o A method to sort the appointments by Date in descending order.

o A method to display the appointment with the earliest (minimum) date (Note: You may not sort the dates in this method).

o A method to display each appointment, one per line.

• The Driver class should do the following:

o Display a menu of choices to the user. The choices are as follows:

1. Enter a new appointment.

2. Sort appointments in ascending order (first to last) by date.

3. Sort appointments in descending order (last to first) by date.

4. Display the next appointment.

5. Display all appointments.

6. Quit.

o Ask the user to make a choice.

o Carry out each choice.

Answer 1

import java.util.*;
import java.io.*;
import static
java.lang.System.exit;
import
java.text.ParseException;
import
java.text.SimpleDateFormat;

class AppointmentBook {
  
String appointments_desc
[];
Date d[];
static int number = 0;
final int max = 20;
  
public AppointmentBook()
{
appointments_desc =
new String [max];
d = new Date[max];
}
  
public void
enterAppointment(){
Scanner sc = new
Scanner(System.in);
System.out.println
("Enter Appointment
Description:\t");
String app =
sc.nextLine();
  
System.out.println
("Enter Date:\t");
String dat = sc.next
();
SimpleDateFormat
dateFormat = new
SimpleDateFormat("dd-MMM-
yyyy");
Date dat2=null;
try {
//Parsing the String
dat2 =
dateFormat.parse(dat);
} catch
(ParseException e) {
// TODO Auto-
generated catch block
e.printStackTrace();
}
  
d[number] = dat2;
appointments_desc
[number] = app;
number ++;
}
  
public void sort_a(){
  
Date temp;
String temp1;
for (int i = 0; i <
number; i++)
{
for (int j = i +
1; j < number; j++)
{
if (d
[i].after(d[j]))
{
temp = d
[i];
d[i] = d
[j];
d[j] =
temp;
  
temp1 =
appointments_desc[i];

appointments_desc[i] =
appointments_desc[j];

appointments_desc[j] = temp1;
}
}
}
}
  
public void sort_d(){
  
Date temp;
String temp1;
for (int i = 0; i <
number; i++)
{
for (int j = i +
1; j < number; j++)
{
if (d
[j].after(d[i]))
{
temp = d
[i];
d[i] = d
[j];
d[j] =
temp;
  
temp1 =
appointments_desc[i];

appointments_desc[i] =
appointments_desc[j];

appointments_desc[j] = temp1;
}
}
}
}
  
public void earliest()
{
int min = 0;

for(int i=0;
i<number; i++ )
{
if(d[i].before(d
[min]))
min = i;
}
System.out.println
("Earliest Record:
\t"+appointments_desc
[min]+"\tDate:\t"+d[min]);
}
  
public void displayAll()
{
for(int i=0;
i<number; i++ )

System.out.println
("Appointment:
\t"+appointments_desc
[i]+"\tDate:\t"+d[i]);
}
}

public class Recruitersa_1 {
  
public static void main
(String args[])
{
System.out.println("Enter
Your Choice:\n1. Enter New
Appointment\n2.Sort
Assignments in Ascending
Order (first to last) by
Date\n3.Sort Assignments in
Descending Order (last to
first) by Date\n4.Display the
next appointment\n5.Display
all appointments\n6.Quit");
Scanner sc = new Scanner
(System.in);
int choice = sc.nextInt
();
  
AppointmentBook a = new
AppointmentBook();
  
while (choice!=6)
{
switch (choice)
{
case 1:
a.enterAppointment();
break;
case 2: a.sort_a();
break;
case 3: a.sort_d();
break;
case 4: a.earliest();
break;
case 5: a.displayAll
();
break;
case 6: exit(0);
}
System.out.println
("Enter Your Choice:\n1.
Enter New Appointment\n2.Sort
Assignments in Ascending
Order (first to last) by
Date\n3.Sort Assignments in
Descending Order (last to
first) by Date\n4.Display the
next appointment\n5.Display
all appointments\n6.Quit");
choice = sc.nextInt
();
}
}
}




run: Enter Your Choice: 1. Enter New Appointment 2.Sort Assignments in Ascending Order (first to last) by Date 3.Sort Assiqnments in Descending Order (last to first) by Date 4.Display the next appointment 5.Display all appointments 6.Quit Enter Appointment Description: DOCTOR Enter Date 12-MAR-2018 Enter Your Choice: 1. Enter New Appointment 2.Sort Assignments in Ascending Order (first to last) by Date 3.Sort Assiqnments in Descending Order (last to first) by Date 4.Display the next appointment 5.Display all appointments 6.Quit Enter Appointment Description: PRESIDENT Enter Date 16-JAN-2018 Enter Your Choice: 1. Enter New Appointment 2.Sort Assignments in Ascending Order (first to last) by Date 3.Sort Assiqnments in Descending Order (last to first) by Date 4.Display the next appointment 5.Display all appointments 6.Quit

4.Display the next appointment 5.Display all appointments 6.Quit 2 Enter Your Choice: 1. Enter New Appointment 2.Sort Assignments in Ascending Order (first to last) by Date 3.Sort Assignments in Descending order (last to first) by Date 4.Display the next appointment 5.Display all appointments 6.Quit Appointment: Appointment: Enter Your Choice: 1. Enter New Appointment 2.Sort Assiqnments in Ascendinq Order (first to last) by Date 3.Sort Assignments in Descending Order (last to first) by Date 4.Display the next appointment 5.Display all appointments 6.Quit PRESIDENT Date: Tue Jan 16 00: 00:00 IST 2018 DOCTOR Date Mon Mar 12 00:00:00 IST 2018 Earliest Record: Enter Your Choice: 1. Enter New Appointment 2.Sort Assignments in Ascending order (first to last) by Date 3.Sort Assignments in Descending order (last to first) by Date 4.Display the next appointment 5.Display all appointments 6.Quit PRESIDENT Date: Tue Jan 16 00: 00:00 IST 2018 BUILD SUCCESSFUL (total time: 2 minutes 51 seconds) i Notifications L3Output

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