CS212: Object Oriented Programming Page 1
Faculty of Computing
CS212: Object Oriented
Programming Class: BESE-13B
Lab 4: Classes and Objects
Date: 6th March, 2024
Time: 10:00 am – 1:00
pm
2:00pm – 5:00 pm
Name: Ushba Fatima
CMS: 467212
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Lab 4: Classes and Objects in Java for Object Oriented Programming, Exercises of Object Oriented Programming
A lab exercise for cs212: object oriented programming, focusing on the creation and manipulation of classes and objects in java. The lab involves defining three classes: employee, student, and product, and a fourth class, inventory, to manage an inventory of products. The exercise includes creating individual objects, updating attributes, and displaying information for each class. The document also covers the creation of a hospital class to manage patient data, including adding new patients, updating medical conditions, and searching for patients by id.
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Faculty of Computing
CS212: Object Oriented
Programming Class: BESE- 1 3B
Lab 4 : Classes and Objects
Date: 6
th
March, 2024
Time: 10:00 am – 1:
pm
2:00pm – 5:00 pm
Name: Ushba Fatima
CMS: 467212
Lab 04 : Introduction to Classes and Objects in Java Task 1: Employee Class Definition
Define a class named Employee with the following attributes:
- name : representing the name of the employee (type: String)
- id : representing the employee's ID (type: int)
- position : representing the employee's position (type: String)
- salary : representing the employee's salary (type: double)
The class should also include a constructor to initialize these attributes.
Employee Information Display
- Create a method within the Employee class named displayInfo() to display the details of
an employee.
- The displayInfo() method prints out the name, ID, position, and salary of the employee. Creating Employee Objects
- In the main method of the EmployeeManagementSystem class, create individual
Employee objects with specific details using the constructor.
Displaying Employee Information
- Call the displayInfo() method for each employee object to display their details. Updating Employee Details
Update the details of an employee directly by accessing and modifying the instance variables of the
Employee object.
E1.displayInfo(); } } Output:
Task 2: Student Grade Management System:
Develop a Java program to manage student grades. Define a class Student with attributes such as name,
roll number, and grades in different subjects. Implement methods to add new students, update grades,
calculate average grades, and display student information. Demonstrate the program by creating student
objects, adding grades for each student, calculating their average grades, and displaying student details.
Code: Student Class: class Student { String name; int rollNumber; int numSubjects= 0 ; int maxSubjects= 5 ; String[] subjects= new String[maxSubjects]; String[] grades= new String[maxSubjects]; Student(String name, int rollNumber) { this.name = name; this.rollNumber = rollNumber; } public void addGrade(String subject, String grade) { subjects[numSubjects] = subject; grades[numSubjects] = grade; numSubjects++; } public void updateGrade(String subject, String grade) { for (int i = 0 ; i < numSubjects; i++) { if (subjects[i]==subject) { grades[i] = grade; return; } } System. out .println("Subject not found for this student."); } public String averageGrade() { int total = 0 ; int gradeNumber; String avgGrade; int avgGradeNumber; for (int i = 0 ; i < numSubjects; i++) {
Main Program: public class StudentManagementSystem { public static void main(String[] args) { Student student1 = new Student("Alice", 101 ); Student student2 = new Student("Bob", 102 ); System. out .println("\n\t\tSTUDENT MANAGEMNET SYSTEM\n\t\t--------------- ----------\n"); student1.addGrade("Math", "A+"); student1.addGrade("Science", "A"); student1.addGrade("English", "F"); student1.addGrade("Computer", "B"); student1.addGrade("Urdu", "F"); student2.addGrade("Math", "B"); student2.addGrade("Science", "C"); student2.addGrade("English", "A"); student2.addGrade("Computer", "D"); student2.addGrade("Urdu", "A+"); student1.updateGrade("Math", "B"); student1.displayInfo(); student2.displayInfo(); } }
Task 3: Product Inventory System:
Create a Java application to manage product inventory for a store. Define a class Product with attributes
like name, ID, quantity, and price. Implement methods to add new products, update quantities, calculate
the total value of the inventory, and display product information. Demonstrate the program by creating
product objects, adding them to the inventory, updating quantities, calculating the total value of the
inventory, and displaying product details.
Code: Product Class: class Product { String name; int ID; int quantity; double price; public Product(String name, int ID, int quantity, double price) { this.name = name; this.ID = ID; this.quantity = quantity; this.price = price; } public void updateQuantity(int newQuantity) { quantity = newQuantity; } public double calculateProductValue() { return quantity * price; } public void displayProductInfo() { System. out .println("Product Name: " + name); System. out .println("Product ID: " + ID); System. out .println("Quantity: " + quantity); System. out .println("Price: $" + price); System. out .println("Total Value: $" + calculateProductValue()); } } Inventory Management:
System. out .println("\t\tBAKERY INVENTORY MANAGEMNENT\n\t\t----------- -----------------\n"); Product product1 = new Product("Biscuits", 108 , 5 , 40 ); Product product2 = new Product("Cake", 92 , 20 , 534.50); Product product3 = new Product("Donut", 231 , 16 , 110 ); bakery.addProduct(product1); bakery.addProduct(product2); bakery.addProduct(product3); bakery.updateQuantity("Donut", 26 ); bakery.displayInventoryProducts(); bakery.displayInventoryDetails(); System. out .println("Total Inventory Value: $" + bakery.calculateInventoryValue()); } } Output:
Task 4: Hospital Patient Management System:
Design a Java program to manage patient information in a hospital. Define a class Patient with attributes
such as name, ID, age, and medical condition. Implement methods to add new patients, update medical
conditions, search for patients by ID, and display patient information. Demonstrate the program by
creating patient objects, adding them to the hospital database, updating medical conditions for some
patients, searching for patients by their ID, and displaying patient details.
Code: Patient Class: public class Patient { String name; int ID; int age; String medicalCondition; public Patient(String name, int ID, int age, String medicalCondition) { this.name = name; this.ID = ID; this.age = age; this.medicalCondition = medicalCondition; } public void updateMedicalCondition(String newCondition) { medicalCondition = newCondition; } public void displayPatientInfo() { System. out .println("Patient Name: " + name); System. out .println("Patient ID: " + ID); System. out .println("Age: " + age); System. out .println("Medical Condition: " + medicalCondition); } }
public static void main(String[] args) { Scanner input= new Scanner(System. in ); Hospital hospital = new Hospital( 10 ); System. out .println("\t\tHOSPITAL PATIENT MANAGEMENT\n\t\t------------ --------------\n"); Patient patient1 = new Patient("John", 101 , 35 , "Fever"); Patient patient2 = new Patient("Smith", 102 , 45 , "Broken Arm"); Patient patient3 = new Patient("Alice", 103 , 28 , "Headache"); hospital.addPatient(patient1); hospital.addPatient(patient2); hospital.addPatient(patient3); hospital.updateMedicalCondition( 102 , "Flu"); hospital.displayPatients(); int patientID; System. out .println("Enter Patient ID to Search: "); patientID=input.nextInt(); hospital.searchPatientByID(patientID); } }
Output: