Code 1:

import java.util.Scanner;

public class CollegeCourse {

public static void main(String[] args) {

}

private String department;

private int courseNo;

private int credits;

private int fee = 120;

public CollegeCourse(String department, int courseNo, int credits){

this.department = department;

this.courseNo = courseNo;

this.credits = credits;

}

public String getDepartment() {

return department;

}

public void setDepartment(String department) {

this.department = department;

}

public int getCourseNo() {

return courseNo;

}

public void setCourseNo(int courseNo) {

this.courseNo = courseNo;

}

public int getCredits() {

return credits;

}

public void setCredits(int credits) {

this.credits = credits;

}

public int getFee() {

return fee * getCredits();

}

public void setFee(int fee) {

this.fee = fee;

}

public void display(){

System.out.println("Department : "+getDepartment()+" Course Number : "+getCourseNo()+" Credits :"+getCredits()+" Fee :$"+getFee());

}

}

Code 2:

import java.util.Scanner;

public class LabCourse extends CollegeCourse {

public LabCourse(String department, int courseNo, int credits){

super(department, courseNo, credits);

super.setFee(50);

}

public void display(){

System.out.println("Lab Course Department "+getDepartment()+" Course Number : "+getCourseNo()+" Credits :"+getCredits()+" Fee :$"+getFee());

}

}

Code 3:

import java.util.Scanner;

public class UseCourse {

public static void main(String[] args) {

Scanner scan = new Scanner(System.in);

System.out.println("Enter Department:");

String department = scan.next();

System.out.println("Enter Course Number:");

int courseNo = scan.nextInt();

System.out.println("Enter Credits:");

int credits = scan.nextInt();

if(department.equalsIgnoreCase("BIO") || department.equalsIgnoreCase("CHM") || department.equalsIgnoreCase("CIS") ||department.equalsIgnoreCase("PHY")){

LabCourse lab = new LabCourse(department, courseNo, credits);

lab.display();

}

else{

CollegeCourse col = new CollegeCourse(department, courseNo, credits);

col.display();

}

}

}

This code is correct but Can someone please state what each of these lines mean/does? Im going to add it as comment next to the lines on my java so I remember it when I look back at the project. Thank you.