國外某所大學的java作業題

 

Student Application

Create a base class Student that has Student ID (int), Student’s name (String), student’s address (String), and letterGrade (char). Now create classes UnderGradStudent, GradStudent and NonDegreeStudent that inherit from Student.

 

The UnderGradStudent has additional properties such as major (String), year (freshman, sophomore, etc), exam1Score (double), exam2Score (double), and exam3Score (double).

 

GradStudent has properties such as department (String), advisor (Person), thesisGrade (char) and examScore (double).

 

The NonDegreeStudent has properties such as creditHours (int), assignScore (double) and examScore (double). Create constructor, accessor, mutator methods for all these classes.

 

Letter Grade for each student type is to be computed as follows:

1.  UnderGradStudent:  gpa is computed based on the following information

Graded activity	Maximum Score	Weight
Exam1Score	50	25%
Exam2Score	100	45%
Exam3Score	250	30%

 

TotalScore	LetterGrade
>=85	A
>=70	B
>=60	C
< 60	F

 

2.  GradStudent: 

ThesisGrade	ExamScore	LetterGrade
A	Does not matter	A
B	>= 90	A
B	>= 80	B
B	< 80	C
C	>=80	C
C	< 80	F

 

3.  NonDegreeStudent: 

Graded activity	Maximum Score	Weight
AssgnScore	250	25%
ExamScore	100	75%

 

TotalScore	LetterGrade
>=80	A
>=70	B
>=55	C
< 55	F

Now write a driver program to do the following:

 

1.  Accept input for new Students

2.  Accept advisor details for an advisor and then list the names of all Students who have the same advisor.  You will use the method in the Person class for this functionality.

3.  List the name of the Students along with their letter grade.

4.  Display student information for all the students that are there in the system.

5.  Exit the system after writing all information to a file. //寫檔案

 

The Person class is as described below:

It contains four instance variables: one each for the name, area, title, andyearsOfEmployment.  It should have appropriate constructors andaccessor and
mutator methods. In addition, it should have a method to check if two persons are the same.  This method will accept another person object as a parameter and check if the calling object and the parameter object both have the same name,
area, title and yearsOfEmployment.  If so, the method should return true, else it returns false.  The GradStudent class definition should include a Person type as an instance variable.

 

See sample .jar (and .dat) program provided.

 

To execute the jar file

·         Download the .jar file and the .dat file. Put them in the same folder.  At the command prompt type injava –jar StudentApp.jar.

·         This will enable you to see how the application should work.

 

StudentApp.jar: