Lab exam
Submitted By:
Muhammad Bilal Rafiuqe
Rc-50152
Submitted To:
Sir Faheem
CLASS: BS-IT (`2th Semester)
Department of Software Engineering
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
NATIONAL UNIVERSITY OF MODERN LANGUAGES -
RAWALPINDI
Code1:
public class Book {
private String name; // Use 'String' instead of 'string'
private String author;
private int count;
public Book(String name, String author, int count) {
this.name = name;
this.author = author;
this.count = count;
}
public void purchase() {
if (count > 0) {
count--;
System.out.println("You have purchased \"" +
name + "\". Remaining count: " + count);
} else {
System.out.println("\"" + name + "\" is out of
stock.");
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
}
}
}
class Customer { // Class names should start with an
uppercase letter
private int customerId;
private String name;
private String address;
public Customer(int customerId, String name, String
address) {
this.customerId = customerId;
this.name = name;
this.address = address;
}
// Optional: You can add getters and setters here if
needed
}
public class EBookStall {
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
public static void main(String[] args) { // Use 'String'
instead of 'string'
Book book1 = new Book("The Hobbit", "J.R.R.
Tolkien", 5); // Corrected the author name
Customer customer1 = new Customer(1, "Afnan
Khan", "123 Main St"); // Added customer ID and
address
book1.purchase();
}
}
Code2:
abstract class Employee {
public abstract double getAmount();
}
class WeeklyEmployee extends Employee { // Class names
should start with an uppercase letter
private int weeksWorked; // Corrected variable name
private double weeklyPay;
public WeeklyEmployee(int weeksWorked, double
weeklyPay) { // Fixed parameter names
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
this.weeksWorked = weeksWorked;
this.weeklyPay = weeklyPay; // Added missing
semicolon
}
@Override // Corrected annotation capitalization
public double getAmount() {
return weeksWorked * weeklyPay;
}
}
class HourlyEmployee extends Employee {
private int hoursWorked;
private double hourlyRate;
public HourlyEmployee(int hoursWorked, double
hourlyRate) {
this.hoursWorked = hoursWorked;
this.hourlyRate = hourlyRate;
}
@Override // Corrected annotation capitalization
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
public double getAmount() {
return hoursWorked * hourlyRate; // Fixed variable
name
}
}
Code3:
public class Student {
interface StudentFee {
double getAmount(); // Fixed spelling of 'getAmount'
String getFirstName(); // Changed 'string' to 'String'
and fixed method name
String getLastName(); // Changed 'string' to 'String'
String getAddress(); // Changed 'string' to 'String'
String getContact(); // Fixed method name and
changed 'string' to 'String'
}
class HostlerStudent implements StudentFee {
private String firstName; // Changed 'string' to
'String'
private String lastName; // Changed 'string' to
'String'
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
private String address; // Changed '
NATIONAL UNIVERSITY OF MODERN LANGUAGES
DEPARTMENT OF Software Engineering
