please help me =( .. Modify class Gradebookas follows: a) Include a second Strin

Question

please help me =( ..


Modify class Gradebookas follows:

a) Include a second String instance variable that represents thename of the course's instructor name.

b) Provide a set method to change the instructor's name and a getmethod to retrieve it.

c) Modify the constructor to specify two parameters -- one for thecourse name and one for the instructor's name.

d) Modify method displayMessage such that it first outputs thewelcome message and course name, then outputs "This course ispresented by: " followed by the instructor's name.

Use your modified class in a test application that demonstrates theclass's new capabilities. please help me =( ..


Modify class Gradebookas follows:

a) Include a second String instance variable that represents thename of the course's instructor name.

b) Provide a set method to change the instructor's name and a getmethod to retrieve it.

c) Modify the constructor to specify two parameters -- one for thecourse name and one for the instructor's name.

d) Modify method displayMessage such that it first outputs thewelcome message and course name, then outputs "This course ispresented by: " followed by the instructor's name.

Use your modified class in a test application that demonstrates theclass's new capabilities.

Explanation / Answer

I will assume set/get methods according toconvention. public class Gradebook {    // (a) new String instancevariable    private Stringinstructor;    // (b) set/get methods    public voidsetInstructor(String name)    {       instructor=name;    }    public StringgetInstructor()    {       returninstructor;    }    // (c)constructor    public Gradebook(Stringcourse, String instructor)    {       setInstructor(instructor);       // if setCourse() does not exist, use the modifier thatcorresponds to the course instancevariable       setCourse(course);    }    // (d) displayMessage()    public StringdisplayMessage()    {       // you did not specify welcomeMessage. Includeit here in the String welcomeMessage.       StringwelcomeMessage="";       returnwelcomeMessage+getcourse()+" This course is presented by:"+getInstructor();    } } For testing: public static void main(String[]args) {    // create a new Gradebook    Gradebook test=newGradeBook("Computer Science", "Dr. ________");    // test its new methods    out.println(test.getInstructor());    test.setInstructor("Dr.________2");    out.println(test.getInstructor());    out.println(test.displayMessage()); }

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