Question

Design a console application that will print the final result obtained by a student with the weighting of each module. Make use of an abstract class named Student that contains variables to store the student number, test result, assignment result and exam. Create a constructor that accepts the student number, test result, assignment result and the exam result as parameters and create get methods for the variables. The Student class must implement an iReport interface that contains the following:

public interface iReport { public void print_report(); }

Create a subclass called Student_Report that extends the Student class. The Student_Report class must contain a constructor to accept the student number, test, assignment and exam results as parameters. Write code for the print_report method which calculates each assessment weighting as follows:

Assessment Weighting

Test 25%

Assignment 25%

Exam 50%

Finally write a useStudent class to instantiate the Student_Report class. Sample output is shown below and you may hard code the same values to test your application.

STUDENT REPORT

********************************

STUDENT NUMBER: 11007

TEST WEIGHTING: 20

ASSIGNMENT WEIGHTING: 18.75

EXAM WEIGHTING: 32.5

FINAL RESULT: 72.25%

*********************************

Answer 1

There is a total of four files for the assignment.

1. iReport.java which contains the interface mentioned in the question.

2. Student.java which contains the abstract class and all the necessary methods and variables.

3. Student_Report.java which extends the class Student.

4. useStudent.java which contains the main method.

Note: I have used the hardcoded values.

Code for iReport.java

// interface

public interface iReport {

    public void print_report();

}

Code for Student.java

// abstract class Student which implements iReport interface

abstract class Student implements iReport {

    // data membets

    String studentNumber;

    double testResult;

    double assignmentResult;

    double examResult;

    // constructor

    public Student(String number, double test, double assignment, double exam) {

        studentNumber = number;

        testResult = test;

        assignmentResult = assignment;

        examResult = exam;

    }

    // getters

    public String getStudentNumber() {

        return studentNumber;

    }

    public double getTestResult() {

        return testResult;

    }

    public double getAssignmentResult() {

        return assignmentResult;

    }

    public double getExamResult(){

        return examResult;

    }

}

Code for Student_Report.java

// class Student_Report extends the abstract class Student

// if we do not Override print_report() method than this class will also become abstract class.

// and if a class is abstract class then we cannot make object of that class. We can only make reference of that abstract class

class Student_Report extends Student {

    // constructor

    public Student_Report(String number , double test , double assignment , double exam ){

        super(number, test, assignment, exam);

    }

    @Override

    public void print_report() {

        System.out.println("STUDENT REPORT");

        System.out.println("***************************");

        System.out.println("STUDENT NUMBER:" + this.getStudentNumber());

        System.out.println("TEST WEIGHTING:" + this.getTestResult());

        System.out.println("ASSIGNMENT WEIGHTING:" + this.getAssignmentResult());

        System.out.println("EXAM WEIGHTING:"+ getExamResult());

        System.out.println("FINAL RESULT:" + (getExamResult() + getAssignmentResult() + getTestResult()));

        System.out.println("***************************");

        

    }

}

Code for useStudent.java

// useStudent class

public class useStudent{

    // main method

    public static void main(String[] args) {

        // creating object of Student_Report class

        Student_Report studentReport = new Student_Report("11007", 20, 18.75, 32.5);

        // calling print_report method to print the report

        studentReport.print_report();

    }

}

Screenshot of the test run

Feel free to comment for any doubt and give thumbs up!

Thank you!