Return A String That Holds User Inputs

I'm working on an assignment for my Java Programming class that requires me to work with Multiple Classes.

Overview of the assignment: Create a "Database" that allows a user to input information about a College Class.

My program has three Classes:

The information that must be tracked in the Course Class is:
- Section Number
- Instructor
- Classroom
- Students (an ArrayList of class Student)

The information that must be tracked in the Student Class is:
- Name
- Major
- GPA
- Hours

The Driver class will use the main method to print the user a prompt asking for inputs, then display all of the user's inputs after he/she wished to exit the program.

I'm having no trouble with asking the user for inputs and then checking the validations for the inputs, I'm currently struggling with return a String that houses all of the user's inputs for the variables above. The information must be returned in a method called toString(). Both the Student and Course Class must have a toString() method that returns the information in the class (value of the variables), I must then call upon these methods from the main method of the Driver Class to print them back to the user.

The toString methods within the Student & Course Classes are at the bottom of the code

To Summarize: What I need to do within the toString() methods to return the values the user has inputted for the various variables? Such as.. Should I pass something through the method? Do I need the this keyboard to pass through the variable again? I just fear that I'm currently misunderstanding a very critical part of programming.

My Driver Class

import java.util.Scanner;
public class Driver {
Course courseInputs = new Course();
Student studentInputs = new Student();
public static void main(String[] args) {

[Code] .....