Object Oriented Programming Lab 7
Question 1
Test run the program with employee record being [89, ”Steve”,”Jackson”,3000] , the resultant annual employee record with a percent hike of 10% in salary should be [89, ”Steve”,”Jackson”,396000].
public class Question1 {
public class Employee {
int id;
String firstname;
String lastname;
int salary;
Employee(int id, String firstname, String lastname, int salary) {
this.id = id;
this.firstname = firstname;
this.lastname = lastname;
this.salary = salary;
}
public int getID() {
return id;
}
public String getFirstName() {
return firstname;
}
public String getLastName() {
return lastname;
}
public String getName() {
return firstname + " " + lastname;
}
public int getSalary() {
return salary;
}
public int getAnnualSalary() {
return salary * 12;
}
public void raiseSalary(int percent) {
salary = salary + (salary * percent / 100);
}
public String toString() {
return "Employee[id=" + id + ", name=" + getName() + ", salary=" + salary + "]";
}
}
public static void main(String[] args) {
Question1 outer = new Question1();
Employee emp = outer.new Employee(89, "Steve", "Jackson", 3000);
System.out.println("Before raise: " + emp);
emp.raiseSalary(10);
System.out.println("After raise: " + emp);
System.out.println("Annual Salary: " + emp.getAnnualSalary());
}
}
C:\Users\TJ\prog\temp\oop\lab7> cmd /C ""C:\Program Files\Eclipse Adoptium\jdk-17.0.13.11-hotspot\bin\java.exe" -XX:+ShowCodeDetailsInExceptionMessages -cp C:\Users\TJ\AppData\Roaming\Code\User\workspaceStorage\095ef1e73c8fb7098a9f0aa9a9e9b786\redhat.java\jdt_ws\lab7_8ba73fe9\bin Question1 "
Before raise: Employee[id=89, name=Steve Jackson, salary=3000]
After raise: Employee[id=89, name=Steve Jackson, salary=3300]
Annual Salary: 39600Question 2
Design and implement classes as shown in the Class diagram below. Write a test program to test the classes created.
// Base class: Person
public class Question2 {
// Inner Person class
public static class Person {
private String name;
private String address;
// Constructor
public Person(String name, String address) {
this.name = name;
this.address = address;
}
// Getters and Setters
public String getName() {
return name;
}
public String getAddress() {
return address;
}
public void setAddress(String address) {
this.address = address;
}
// toString method
@Override
public String toString() {
return "Person[name=" + name + ", address=" + address + "]";
}
}
// Subclass: Student
public static class Student extends Person {
private String program;
private int year;
private double fee;
// Constructor
public Student(String name, String address, String program, int year, double fee) {
super(name, address);
this.program = program;
this.year = year;
this.fee = fee;
}
// Getters and Setters
public String getProgram() {
return program;
}
public void setProgram(String program) {
this.program = program;
}
public int getYear() {
return year;
}
public void setYear(int year) {
this.year = year;
}
public double getFee() {
return fee;
}
public void setFee(double fee) {
this.fee = fee;
}
// toString method
@Override
public String toString() {
return "Student[" + super.toString() +
", program=" + program +
", year=" + year +
", fee=" + fee + "]";
}
}
// Subclass: Staff
public static class Staff extends Person {
private String school;
private double pay;
// Constructor
public Staff(String name, String address, String school, double pay) {
super(name, address);
this.school = school;
this.pay = pay;
}
// Getters and Setters
public String getSchool() {
return school;
}
public void setSchool(String school) {
this.school = school;
}
public double getPay() {
return pay;
}
public void setPay(double pay) {
this.pay = pay;
}
// toString method
@Override
public String toString() {
return "Staff[" + super.toString() +
", school=" + school +
", pay=" + pay + "]";
}
}
// Main method to test the program
public static void main(String[] args) {
// Testing the classes
Person person = new Person("Alice", "123 Main St");
System.out.println(person);
Student student = new Student("Bob", "456 Elm St", "Computer Science", 2025, 15000.0);
System.out.println(student);
Staff staff = new Staff("Charlie", "789 Oak St", "Engineering", 70000.0);
System.out.println(staff);
}
}
C:\Users\TJ\prog\temp\oop\lab7> cmd /C ""C:\Program Files\Eclipse Adoptium\jdk-17.0.13.11-hotspot\bin\java.exe" -XX:+ShowCodeDetailsInExceptionMessages -cp C:\Users\TJ\AppData\Roaming\Code\User\workspaceStorage\095ef1e73c8fb7098a9f0aa9a9e9b786\redhat.java\jdt_ws\lab7_8ba73fe9\bin Question2 "
Person[name=Alice, address=123 Main St]
Student[Person[name=Bob, address=456 Elm St], program=Computer Science, year=2025, fee=15000.0]
Staff[Person[name=Charlie, address=789 Oak St], school=Engineering, pay=70000.0]
References
Information
- date: 2025.03.27
- time: 15:04