How To Connet Between Two Classes

[Pinky Punch]

Hello!!
I Have A Question
I Feel It is Little Stupid :)
But I wanna To Know It

I wanna to know howa to connect between two classes
I have 3 examples Iwanna To know How to do it please :(

First example :

I Have Class Student and Class Courses

And the class Course need some variables of class Student ,How Can I Do that ???!!!



Second Example :
Also If i wanna to make a third class its name is grade class that connect between the course and student classes In other Words I wanna to make an object of class student and courses in the grade class But i wanna This object to be refrence for the both classes not A new one bcz I will Add values to both classes through that class



Third Example:
Last thing If i make class(Student ) and i want to make an array of that class at onther class(Department) What i should do ???

HOpe U Understand me
Im waiting for Ur Help
THnx In Advance

[FlipPoker@gmail.com]

Divide and conquer... I'll take the first one.

Define your class Student first. Define the data that is private to Student. Then define public get/set methods that other classes will use to access Student's data. For example:

public class Student {
    private String name;
...

    public String getName() {
        return name;
    }
    
    public void setName(String s) {
        name = s;
    }
...
}

In class Courses:

public class Courses {


...

    public void addStudent(Student s) {

        ...
        System.out.println("You added:  " + s.getName());
    }

...

}

[JosAH]

Please get rid of that huge font, the silly formatting, the purple subheaders and those stupid smilies; your question reads like a little kid's birthday party invitation.

kind regards,

Jos

[DarrylBurke]

Please get rid of that huge font, the silly formatting, the purple subheaders and those stupid smilies

Seconded. Also, use proper words.

db

[ozzyman]

Lol, and I have expected the "i"s to be written with love-hearts.

As for your second example, make a package and put all 3 classes in the same package.

package school;

public class Grade {

    private java.util.List<Student> studentList = new java.util.ArrayList<Student>();

    Grade(Student[] students) {
        addStudents(students);
    }

    Grade(java.util.List<Student> students) {
        addStudents(students);
    }

    public void addStudent(Student s) {
        studentList.add(s);
    }

    public void addStudents(java.util.List<Student> s) {
        studentList.addAll(s);
    }

    public void addStudents(Student[] s) {
        studentList.addAll(java.util.Arrays.asList(s));
    }

}

All three are connected because Grade contains Students who have Courses