Programs Not Compiled Perfectly...Help! Driving Me Crazy!

Question

With the appropiate lines highlighted, I just need to know on what is the correct statement that needs to be added, deleted, etc. that needs to be written in order to compile both programs correctly! That is to say, what The assignment is due tomorrow at 11:59 PM PST via e-mail. If possible...when replying back, could you highlight the appropiate
line(s) such that I know if anything needs to be added, deleted, changed, or what not so the programs compile perfectly? In this assignment, I am trying to implement two different java programs (which they go together) where I need to list the student names according to their ID Number. For example, if I have a file called input.txt w/ the following list:
John Smith 8956
Sally Walters 3578
Joan Brown 5790
Michael White 2046
I would need to make sure that my program will put these students in order by their ID #, NOT their last or first name. Please note that I will NEED the StringTokenizer in my second program, so please DON'T tell me that it is not necessary because it is! :)
- StudentDB.java
import java.util.ArrayList;
public class StudentDB
     public StudentDB()
          students = new ArrayList();
     public void addStudent(Student aID)
          students.add(aID);
     public int dbSize()
          return students.size();
     public Student getStudent(int i)
          students.getStudent(i);
          Students s = (Students)students.get(i);
          return s;
     private ArrayList students;
- (Errors for StudentDB.java)
A:\StudentDB.java:15: cannot resolve symbol
symbol : class Student
location: class StudentDB
     public void addStudent(Student aID)
^
A:\StudentDB.java:25: cannot resolve symbol
symbol : class Student
location: class StudentDB
     public Student getStudent(int i)
^
A:\StudentDB.java:27: cannot resolve symbol
symbol : method getStudent (int)
location: class java.util.ArrayList
          students.getStudent(i);
^
A:\StudentDB.java:28: cannot resolve symbol
symbol : class Students
location: class StudentDB
          Students s = (Students)students.get(i);
^
A:\StudentDB.java:28: cannot resolve symbol
symbol : class Students
location: class StudentDB
          Students s = (Students)students.get(i);
^
5 errors
- DBTest.java
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.*;
public class DBTest
public static void main(String[] args) throws IOException
BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
DBTest StudentDB db = new StudentDB();
while
          String inputLine = console.readLine();
if (inputLine == null) done = true;
else
     StringTokenizer token = new StringTokenizer(inputLine);
while (token.hasMoreTokens())
                    Student s = new Student(name, ID)
                         db.aIDstream(s);
- (Errors for DBTest.java)
A:\DBTest.java:15: ';' expected
DBTest StudentDB db = new StudentDB();
^
A:\DBTest.java:16: '(' expected
while
^
A:\DBTest.java:32: illegal start of expression
^
A:\DBTest.java:31: ')' expected
^
4 errors
Anyone who can help greatly shall be rewarded w/ Duke Dollars. I am winding down to the end of this semester, & I only need CS46A for my major...which I am in right now! Your help will NEVER be forgotten! Thanks! ;)

Answer 1

I would read the tutorial, but at this time...I don't have
much time left since it is due at 11:59 PM tonight. I
apologize for this "last-minute" comment. At this time, the
errors for StudentDB.java remain the same, but the errors for DBTest.java have been lessened to only 1 error left! What is the correct statement/solution for each error & how is it written correctly? :)
- StudentDB.java
import java.util.ArrayList;
public class StudentDB
     public StudentDB()
          students = new ArrayList();
     public void addStudent(Student aID)
          students.add(aID);
     public int dbSize()
          return students.size();
     public Students getStudents(int i)
          students.getStudents(i);
          Students s = (Students)students.get(i);
          return s;
     private ArrayList students;
(Errors in StudentDB.java)
A:\StudentDB.java:15: cannot resolve symbol
symbol : class Student
location: class StudentDB
     public void addStudent(Student aID)
^
A:\StudentDB.java:25: cannot resolve symbol
symbol : class Students
location: class StudentDB
     public Students getStudents(int i)
^
A:\StudentDB.java:27: cannot resolve symbol
symbol : method getStudents (int)
location: class java.util.ArrayList
          students.getStudents(i);
^
A:\StudentDB.java:28: cannot resolve symbol
symbol : class Students
location: class StudentDB
          Students s = (Students)students.get(i);
^
A:\StudentDB.java:28: cannot resolve symbol
symbol : class Students
location: class StudentDB
          Students s = (Students)students.get(i);
^
5 errors
- DBTest.java
import java.util.ArrayList;
import java.util.StringTokenizer;
import java.io.*;
public class DBTest
     public static char ch;
     public static void main(String[] args)throws IOException
          char StudentDB()
               BufferedReader console = new BufferedReader(new InputStreamReader(System.in));
DBTest StudentDB db = new StudentDB();
while()
                    String inputLine = console.readLine();
if (inputLine == null) done = true;
else
                         StringTokenizer token = new StringTokenizer(inputLine);
while(tokenizer.hasMoreTokens())
                              tokenizer.nextToken();
                    Student s = new Student(name, ID)
                                   db.aIDstream(s);
(Errors in DBTest.java)
A:\DBTest.java:16: ';' expected
          char StudentDB()
^
1 error
I just ask to please go easy on me. I just had a history test today, & I need to continue w/ my studying for my Discrete Math Test for Friday.
This computer assignment is due tonight, but I also need to study my
Discrete Math Test. For everyone...especially to those who have replied: I AM NOT AS ADVANCED NOR WELL-EXPERIENCED AS YOU ALL! I REALLY
NEED ALL THE HELP I CAN GET SUCH THAT THIS PROGRAM IS WRITTEN PERFECTLY.
If you can show me within the program on how each line is written, your
help will be most appreciated! :) :( ;)