Need a lot of help please

Question

so for my project i have to create multiple classes to create a gradebook. i know half of this probably doesn't make sense, but if anyone could help at all i would appreciate it. pretty much the name of each method tells what it is meant to do. none of this will compile and i am missing a lot.
public class Assignment extends Student
String name;
double maxScore;
int numStudents;
int maxStudents = 100;
private Student [] students = new Student [maxStudents];
private int n = 0;
Student student;
public Assignment(){
this.maxScore= 100;
this.numStudents = 0;
public Assignment(double maxScore, Student [] students){
this.maxScore= maxScore;
this.students = students;
public boolean addStudent(Student student){
for(int i=0; i<students.length; i++){
if(students[i] =null){
students[i] = student;
return true;
return false;
boolean setScore(Student student, double score){
this.score = score;
double getScore(Student student){
return score;
double getScoreMax(){
int scoreMax = Integer.MIN_VALUE;
for(int index=0; index<students.size(); index++){
if(students.get(index)>scoreMax)
scoreMax=students.get(index);
return scoreMax;
double getScoreMean(){
double scoreMean = 0;
int sum = 0;
for(int index=0; index<students.size(); index++){
sum = sum + students.get(index);
scoreMean = sum/2;
double getScoreMedian(){
double scoreMedian = 0;
scoreMedian = students.get(Math.floor(students.size()/2));
return scoreMedian;
public class Course extends Assignment{
String title;
Professor prof;
int k;
int maxStudents = 100;
Student[] students = new Student[maxStudents];
Assignment[] hws = new Assignment[k];
Course courses;
Assignment assignment;
int total=0;
int gradeNum= 0;
int grade;
double average;
Course(String title, Professor prof){
this.title = new String();
this.prof = new Professor();
Course(String title, Professor prof, Student[] students){
this.title = title;
this.prof = prof;
this.students= students;
boolean addStudent(Student student){
for(int i=0; i<students.length; i++){
if(students[i] =null){
students[i] = student;
return true;
else if(i >= maxStudents){
return false;
void dropStudent(Student student){
for(int i=0; i<students.length; i++){
if (students[i] ==student){
students[i] = null;
Assignment addAssignment(double maxscore){
for(int i=0; i<hws.length; i++){
if(hws[i] =null){
hws[i] = assignment;
return assignment + maxScore;
void addAssignment(Assignment assignment){
for(int i=0; i<hws.length; i++){
if(hws[i] =null){
hws[i] = courses;
double getCourseGrade(Student student){
          while (gradeNum <= maxStudents )
total = total + grade;
gradeNum = gradeNum + 1;
if ( gradeNum != 0 ){
average = (double) total / gradeNum;
public class Utilities{
     int total = 0;
int gradeNum = 0;
int grade;
double average;
     Student student;
Professor professor = new Professor(0, name);
Student student = new Student(0, name);
public static double computeSemesterGPA(Student student, Course[] courses){
while (Student student)
total = total + grade;
gradeNum = gradeNum + 1;
if ( gradeNum != 0 ){
averageGradesl = (double) total / gradeNum;
public static void printObject(Person person){
System.out.println("Student:" + student.toString());
System.out.println("Prof:" + professor.toString());
public static void printObject(Assignment assign){
while (gradeNum <= maxStudents)
total = total + grade;
gradeNum = gradeNum + 1;
if ( gradeCounter != 0 ){
averageScoreonassignment = (double) total / gradeNum;
System.out.println(students [] + average);
}

Answer 1

mm3mm wrote:
none of this will compile and i am missing a lot.Stop right now, scrap this code and restart as this line above alone tells me that your going about your coding all wrong, that you're trying to add code to already bad code. What you need to do is this:
1) Plan first. Before committing a single line of code, write a general outline for your program and then flesh it out (all on paper).
2) When you start writing code, do it in small bits at a time.
3) After adding a small bit of code (a few lines) try to compile the code to see if there are any compile errors.
4) Here's the important part: if you find any compile or run errors, then stop, do not add any more code, but instead fix the code you have. The key is that you should never add good code to bad.
5) Then only after the code is fixed, continue with step 3) and loop this process until done.
Best of luck.