Question

(JAVA) In this assignment, you will implement a superclass Appointment and subclasses Onetime, Daily, and Monthly. An appointment has a description (for example, “see the dentist”) and a date. Write a method occursOn(int year, int month, int day) that checks whether the appointment occurs on that date. For example, for a monthly appointment, you must check whether the day of the mon.th matches.

In your application part, fill an array of Appointment objects with a mixture of appointments. Have the user enter a date and print out all appointments that occur on that date.

Requirements:

• fully document your programs and staple (5 pts)
• definition of the super class and each subclasses (5 pts for each)
• write an application in a separate file.(10 pts)
• Testing your classes/methods by using different input values (15 pts)***

Answer 1

package inheritance;

// Defines a class Appointment

class Appointment

{

String description;

// Parameterized constructor

Appointment(String des)

{

description = des;

}// End of parameterized constructor

// Overrides toString() method to return description

public String toString()

{

return "\n\n Appointment Information: " + description;

}// End of method

}// End of class Appointment

// Creates a derived class Onetime from super class Appointment

class Onetime extends Appointment

{

int day;

int month;

int year;

// Parameterized constructor

Onetime(String des, int y, int m, int d)

{

super(des);

day = d;

month = m;

year = y;

}// End of parameterized constructor

// Overrides toString() method to return one time appointment information

public String toString()

{

return super.toString() + "\n Appointment Date: " + day + "/" + month + "/" + year;

}// End of method

}// End of class Onetime

// Creates a derived class Daily from super class Appointment

class Daily extends Appointment

{

int day;

// Parameterized constructor

Daily(String des, int d)

{

super(des);

day = d;

}// End of parameterized constructor

// Overrides toString() method to return daily appointment information

public String toString()

{

return super.toString() + "\n Appointment Day: " + day;

}// End of method

}// End of class Daily

// Creates a derived class Monthly from super class Appointment

class Monthly extends Appointment

{

int month;

// Parameterized constructor

Monthly(String des, int m)

{

super(des);

month = m;

}// End of parameterized constructor

// Overrides toString() method to return monthly appointment information

public String toString()

{

return super.toString() + "\n Appointment Day: " + month;

}// End of method

}// End of class Monthly

// Driver class definition

public class AppointmentTest

{

// Declares an array of object of class Appointment

static Appointment app[];

// Defines a method to check the appointment date and displays information

static void occursOn(int year, int month, int day)

{

// Sets the found status to 0 for not found appointment

int flag = 0;

// Loops till number of appointment

for(int c = 0; c < app.length; c++)

{

// Checks if current object is of type Onetime class

if(app[c] instanceof Onetime)

{

// Converts the current object to Onetime class object

Onetime o = (Onetime)app[c];

// Checks if year, month and day of parameter is equals to

// the current object year, month and day

if(o.year == year && o.month == month && o.day == day)

{

// Sets the flag value to 1 for found appointment

flag = 1;

// Displays the current object information

System.out.println("\n *********** One Time Appointment ***********");

System.out.println(o);

}// End of if condition

}// End of if condition

// Otherwise checks if current object is of type Daily class

else if(app[c] instanceof Daily)

{

// Converts the current object to Daily class object

Daily d = (Daily)app[c];

// Checks if current object day is equals to parameter day

if(d.day == day)

{

// Sets the flag value to 1 for found appointment

flag = 1;

// Displays the current object information

System.out.println("\n *********** Daily Appointment ***********");

System.out.println(d);

}// End of if condition

}// End of else if condition

// Otherwise current object is of type Monthly class

else

{

// Converts the current object to Monthly class object

Monthly m = (Monthly)app[c];

// Checks if current object month is equals to parameter month

if(m.month == month)

{

// Sets the flag value to 1 for found appointment

flag = 1;

// Displays the current object information

System.out.println("\n *********** Monthly Appointment ***********");

System.out.println(m);

}// End of if condition

}// End of else

}// End of for loop

// Checks if flag value is 0 then appointment is not available on the date

if(flag == 0)

// Displays the not found information

System.out.println("\n No Appointment on: " + day + "/" + month + "/" + year);

System.out.println("\n *********** *********** ***********\n");

}// End of method

// main method definition

public static void main(String s[])

{

// Declares an array of object of class Appointment of size 6

app = new Appointment[6];

// Creates object of class Onetime

app[0] = new Onetime("see the cardiology", 2010, 10, 2);

app[1] = new Onetime("see the gynic", 2019, 5, 28);

// Creates object of class Daily

app[2] = new Daily("see the dentist", 2);

app[3] = new Daily("see the pedeatric", 9);

// Creates object of class Monthly

app[4] = new Monthly("see the gynic", 5);

app[5] = new Monthly("see the dentist", 4);

// Calls the method to check the appointment

occursOn(2010, 10, 2);

occursOn(2020, 10, 14);

occursOn(0, 0, 2);

occursOn(0, 5, 2);

}// End of main method

}// End of driver class

Sample Output:

*********** One Time Appointment ***********

Appointment Information: see the cardiology
Appointment Date: 2/10/2010

*********** Daily Appointment ***********

Appointment Information: see the dentist
Appointment Day: 2

*********** *********** ***********

No Appointment on: 14/10/2020

*********** *********** ***********

*********** Daily Appointment ***********

Appointment Information: see the dentist
Appointment Day: 2

*********** *********** ***********

*********** Daily Appointment ***********

Appointment Information: see the dentist
Appointment Day: 2

*********** Monthly Appointment ***********

Appointment Information: see the gynic
Appointment Day: 5

*********** *********** ***********