How to use a variable of one class, in another in Java?

Question

I\'m just working through a few things as practice for an exam I have coming up, but one thing I cannot get my head round, is using a variable that belongs to one class, in

Answer 1

First,

You are extending Student class in Course class, which means, student class gets all the coruse class properties. So, the student class does not have the courseTitle property.

Second, yes, it is unnesessary - you need to do the following:

public class Course
{
    private Award courseAward;
    private String courseCode;
    public String courseTitle;
    private String courseLeader;
    private int courseDuration;
    private boolean courseSandwich;

    public Course(String code, String title, Award award, String leader, int duration, boolean sandwich)
    {
        courseCode = code;
        courseTitle = title;
        courseAward = award;
        courseLeader = leader;
        courseDuration = duration;
        courseSandwich = sandwich;

    }

}

public class Student 
{
    private int studentNumber;
    private String studentName;
    private int studentPhone;

    // This is where you keep the course object associated to student
    public Course studentCourse;

    public Student(int number, String name, int phone, Course course)
    {
        studentNumber = number;
        studentName = name;
        studentPhone = phone;
        studentCourse = course;
    }  
}

Example usage would be something like this:

Course course = new Course("ASD", "TITLE", null, "ME", 50, true);   
Student student = new Student(1, "JOHN", "5551234", course);

And then, get the course information you need from student via, i.e.:

student.studentCourse.courseTitle;

Since now student.studentCourse will be a course object with all of its properties.

Cheers,