4b	Advanced Placement Computer Science Lab

Classes and Object Oriented Programming, Part II

Introduction

A teacher wants a program that will keep track of grades for students. Each student will be describe by a name a student ID number and at least three test scores. The constructor for the Student class will have two parameters, name and ID. There will also be several methods including inputGrades, getAverage, toString as well as getter methods and mutator methods that allow the user to edit the data.

All classes have a default "toString" method which can be called by simply concatenating the object variable to a string. In this exercise you are going to overwrite this method to out put your data to the driver program

public class Student

{

//declare instance data

//constructor

public Student (String studentName)

{

//add body

}

//input Grades

inputGrades()

{

//body of method to input grades

//for a student; includes error

//checking; uses dialog box

}

//getAverage

public double getAverage()

{

//body of method to calculate

//averages of test

}

//toString

public String toString()

{

//body of method to generate a

//string that allows user to

//see data

}

//getter method getName

public String getName()

{

//returns name

}

//mutator method modifyName(String n)

public void modifyName()

{

//returns name

}

}//end class

Programming Assignment

Write a class named Student that describes different types of grades (at least 4). These attributes should be the basis of the private variables of the class. Define a "getter" method for each attribute and a constructor that has parameters that allow for the input of data into the class variables. The Student class should be similar to that which has been stubbed out above, Use an input dialog box for user input.

I

Write a user or client program for your Student class. Create five instances of students based upon data supplied by you. Display the attributes of each student in a message dialog box using the getter methods. Calculate the average grade of the students using a user defined method. Use a message dialog box for output from the program.

Turn in a program listing your source code. Source code should use proper formatting. Also turn in a copy of your output as in previous assignments. This can be obtained by running the program and then using AltPrintScreen to copy the window of the output onto the clipboard. Then paste the contents of the clipboard into WordPad and print out the document. In addition to the source code, the output, also turn in the answer to the questions listed below.