Question

Question 1 (4 mark): Implement a program with two classes according to the following UML diagram: College -firstLab Student: StudentAccount - secondLab Student: StudentAccount +main (String (1) : void +College (String, String, int, int) : +printStudents(): void contains StudentAccount -name: String -studentNumber: int StudentAccount (String, int): +getName(): String +getStudentNumber(): int 2 REQUIREMENTS • The constructor College (String, String, int, int) shall create two component objects of type StudentAccount, i.e., the first lab student and the second lab student, and initialize them using corresponding names and student numbers. The program shall create in the main() function an object of type College using its constructor with four parameters that contain names and student numbers of two students (the first lab student, the second lab student), your code should use the following given student information: 2020001 Frank White - for the 1st lab student 2020002 Jurgen Klopp - for the 2nd lab student The constructor StudentAccount (String, int) shall initialize the student's name and student number, and store the name in the field name, store the student number in the field studentNumber. • Then the main() method shall call printStudents () method to print information about the students in the following example format. Your code must work exactly as the specification and the output should be exactly the same as the output example. Example of the program output: The first lab student: Frank White 2019001 The second lab student: Jurgen Klopp 2019002

Answer 1

Code:

public class College    //college class
{
    public StudentAccount firstLabStudent, secondLabStudent;    //first and second lab student member variables to College class
    College(String firstName, String secondName, int firstId, int secondId) //constructor
    {
        firstLabStudent = new StudentAccount(firstName, firstId);   //creating firstLabStudent object
        secondLabStudent = new StudentAccount(secondName, secondId);    //creating secondLabStudent object
    }
    public void printStudents() //printStudents print the information of first and second lab students
    {
        System.out.println("The first lab student: "+firstLabStudent.getName()+" "+firstLabStudent.getStudentNumber());
        System.out.println("The second lab student: "+secondLabStudent.getName()+" "+secondLabStudent.getStudentNumber());
    }
    public static void main(String []args)  //main method 
    {
        College clg = new College("Frank White", "Jurgen Klopp", 2019001, 2019002); //creating a College object in main and printing the students info
        clg.printStudents();
    }
}
class StudentAccount    //student account class
{
    public String name; //name of student
    public int studentNumber;   //id of student
    StudentAccount(String name, int id) //constructor of student account class
    {
        this.name = name;   
        this.studentNumber = id;
    }
    String getName()    //returns name of the calling student object
    {
        return name;
    }      
    int getStudentNumber()  //returns student number of the calling student object
    {
        return studentNumber;
    }
}

Code Screenshot:

Output:

$javac College.java $java-Xmx128M-Xms16M College The first lab student: Frank White 2019001 The second lab student: Jurgen Klopp 2019002

Each and everything is explained in the comment section of the code.

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