Question

Hello I'm having a bit of trouble with this assignment. Any help would be appreciated!

Overview

You must implement a Java class which simulates a Student object. These Student objects will represent grade records for students.

Variable Details

 name : private String : represents the Student’s name

 sid: private String : represents the Student’s ID number

 quizzes: private double[] : an array whose size is equal to NUM_QUIZZES. Each element will be used to store one of the student’s quiz scores. For example, if quizzes[0] is set to 19.5, this would mean that the student scored 19.5 points on the first quiz.

 exams: private double[] : an array whose size is equal to NUM_EXAMS. Each element will be used to store one of the student’s exam scores. If exams[0] is set to 46.5, this would mean that the student scored 46.5 points on the Midterm. If exams[1] is set to 44.2, this would mean that the student scored 44.2 points on the final.

 NUM_QUIZZES: public final static int : represents the number of quizzes given over the course of the semester. This variable should be set to 4.

 NUM_EXAMS: public final static int: represents the number of exams given over the course of the semester. This variable should be set to 2 (midterm and final).

 QUIZ_MAX_POINTS: public final static int: represents the maximum number of points a student can score on a quiz. This variable should be set to 20.

 MIDTERM_MAX_POINTS: public final static int: represents the maximum number of points a student can score on the midterm. This variable should be set to 50.

 FINAL_MAX_POINTS: public final static int: represents the maximum number of points a student can score on the final. This variable should be set to 70.

Constructor Methods

 Student(): A Student constructor with no parameters. This sets the Student’s name to “NewStudent, A.” and sets the Student’s sid to “0000000”. This also initializes quizzes and exams.

 Student(newName: String): A Student constructor overload with one parameter that represents the name of the student. This sets name equal to the argument newName and sid to “0000000”. This also initializes quizzes and exams.

 Student(newName: String, newSid: String): A Student constructor overload with two parameters representing the name and ID of the student. This set name equal to the argument newName and sid equal to the argument newSid. This also initializes quizzes and exams.

Other Methods

 setName(newName: String): Returns void. Has one String parameter representing the name of the student. This method must first verify that newName follows the correct pattern. A valid name has more than one character, contains a comma followed by a space bar, and ends with a ‘.’ (period) character. If newName meets all three criteria, name will be set to newName; otherwise, a message stating that newName was not in the correct format and therefore could not update name should be displayed. If newName is invalid and name is null, name should be set to “NewStudent, A.”.

 getName(): Returns a String. Has no parameters. This method returns name.

 setSid(newSid: String): Returns void. Has one String parameter representing the ID of the student. This method must first verify that newSid follows the correct pattern. A valid ID is seven characters in length and contains only digit characters. If newName meets both criteria, sid will be set to newSid; otherwise, a message stating that newSid was not in the correct format and therefore could not update sid should be displayed. If newSid is invalid and sid is null, sid should be set to “0000000”.

 getSid(): Returns a String. Has no parameters. This method returns sid.

 setQuiz(quizNumber: int, score: double): Returns void. Has one int parameter representing a quiz number and one double parameter representing the student’s score for that quiz. This method must first check to ensure that quizNumber is a value between 1 and NUM_QUIZZES. The method must also check to ensure that score is a value between 0 and QUIZ_MAX_POINTS. If both criteria are met, the method sets quizzes[quizNumber - 1] equal to score; otherwise, the method should display a message stating that the quiz could not be set.

 getQuiz(quizNumber: int): Returns and int. Has one parameter representing a quiz number. This method must first check to ensure that quizNumber is a number between 1 and NUM_QUIZZES. If quizNumber meets this criterion, the method will return the value quizzes[quizNumber - 1]. Otherwise, the method returns a -1.

 setMidtermExam(score: double): Returns void. Has one parameter representing the student’s score on the midterm. This method must first check to ensure that score is a value between 0 and MIDTERM_MAX_POINTS. If score meets this criterion, then exams[0] is set equal to score; otherwise, the method should display a message stating that the midterm exam score could not be set.

 getMidtermExam(): Returns a double. Has no parameters. This method returns exams[0].

 setFinalExam(score: double): Returns void. Has one double parameter representing the student’s score on the final. This method must first check to ensure that score is a value between 0 and FINAL_MAX_POINTS. If score meets this criterion, then exams[1] is set equal to score; otherwise, a message stating that the final exam score could not bet set should be displayed.  getFinalExam(): Returns a double. Has no parameters. This method returns exams[1].

 toString(): Returns a String. Has no parameters. This method should return a String that represents this Student object. The returned String should include the Student’s name, the Student’s ID, the Student’s four quiz scores, and the Student’s two exam scores concatenated into one String.

Answer 1

Please find the java class program below

Note: file name should be in Main.java.

Program:

import java.util.regex.Matcher;
import java.util.regex.Pattern;

//student class
class Student {
public
final static int NUM_EXAMS = 2;
final static int NUM_QUIZZES = 4;
final static int QUIZ_MAX_POINTS = 20;
final static int MIDTERM_MAX_POINTS = 50;
final static int FINAL_MAX_POINTS = 70;
private
String name;
String sid;
double quizzes[] = new double[NUM_QUIZZES];
double exams[] = new double[NUM_EXAMS];
  
public Student()
{
this.name = "NewStudent, A.";
this.sid = "0000000";
for (int i=0; i<NUM_QUIZZES; i++)
{
this.quizzes[i]=0;
}
  
for (int i=0; i<NUM_EXAMS; i++)
{
this.exams[i]=0;
}
}
  
public Student(String name)
{
this.name = name;
this.sid = "0000000";
for (int i=0; i<NUM_QUIZZES; i++)
{
this.quizzes[i]=0;
}
  
for (int i=0; i<NUM_EXAMS; i++)
{
this.exams[i]=0;
}
}
  
public Student(String name, String sid)
{
this.name = name;
this.sid = sid;
for (int i=0; i<NUM_QUIZZES; i++)
{
this.quizzes[i]=0;
}
  
for (int i=0; i<NUM_EXAMS; i++)
{
this.exams[i]=0;
}
}
  
public void setName(String name)
{
String pattern = ".*, .*.$";
  
if(Pattern.matches(".*, .*\\.$",name))
{
this.name=name;   
}
else
{
System.out.println("Student name doesn't match the criteria.\n");
}
}
  
public String getName()
{
return this.name;
}
  
public void setSid(String sid)
{
if(Pattern.matches("[0-9][0-9][0-9][0-9][0-9][0-9][0-9]",sid))
{
this.sid=sid;   
}
else
{
System.out.println("Student Id doesn't match the criteria.\n");
}
}
  
public String getSid()
{
return this.sid;
}
  
public void setQuiz(int qno, double score)
{
if(qno >= 1 && qno <= NUM_QUIZZES && score <= QUIZ_MAX_POINTS && score >= 0 )
{
this.quizzes[qno-1]=score;
}
else
{
System.out.println("Quiz score couldn't be set.\n");
}
}
  
public double getQuiz(int qno)
{
if(qno >= 1 && qno <= NUM_QUIZZES)
{
return this.quizzes[qno-1];
}
else
{
return -1;
}
}
  
public void setMidtermExam(double score)
{
if(score >= 0 && score <= MIDTERM_MAX_POINTS)
{
this.exams[0]=score;
}
else
{
System.out.println("Mid term score could not be set.\n");
}
}
  
public double getMidtermExam()
{
return this.exams[0];
}
  
public void setFinalExam(double score)
{
if(score >= 0 && score <= FINAL_MAX_POINTS)
{
this.exams[1] = score;
}
else
{
System.out.println("Final score could not be set.\n");
}
}
  
public double getFinalExam()
{
return this.exams[1];
}
  
public String toString()
{
//do concatenation and print the values
return this.name +", "+this.sid +", "+this.quizzes[0] +
", "+this.quizzes[1]+", "+this.quizzes[2]+", "+this.quizzes[3] +
", "+this.exams[0] +", "+this.exams[1];
}
}

public class Main
{
public static void main(String[] args) {

Student S1 = new Student();
Student S2 = new Student();

System.out.println("successs case output.");
//successs case
S1.setName("Kyrie, I.");
System.out.println(S1.getName());
S1.setSid("1234567");
System.out.println(S1.getSid());

//setting all the quiz value as right values
S1.setQuiz(1, 20);
S1.setQuiz(2, 5);
S1.setQuiz(3, 15);
S1.setQuiz(4,0);

System.out.println("Score 1:" + S1.getQuiz(1));
System.out.println("Score 2:" + S1.getQuiz(2));
System.out.println("Score 3:" + S1.getQuiz(3));
System.out.println("Score 4:" + S1.getQuiz(4));


S1.setMidtermExam(20);
System.out.println("Mid Term score: " + S1.getMidtermExam());
S1.setFinalExam(70);
System.out.println("Mid Term score: " + S1.getFinalExam());

System.out.println(S1.toString());

//failure case
System.out.println("failure case output.");
S2.setName("Kuyrie, I");
S2.getName();
S1.setSid("123456S");
System.out.println(S2.getSid());

//setting all the quiz value as right values
S2.setQuiz(0, 21);
S2.setQuiz(2, -1);
S2.setQuiz(3, 15);
S2.setQuiz(5,3);

System.out.println("Score 1:" + S2.getQuiz(1));
System.out.println("Score 2:" + S2.getQuiz(2));
System.out.println("Score 3:" + S2.getQuiz(3));
System.out.println("Score 4:" + S2.getQuiz(4));

S2.setMidtermExam(-1);

S2.setMidtermExam(60);
System.out.println("Mid Term score: " + S2.getMidtermExam());

S2.setFinalExam(90);
S2.setFinalExam(-1);
System.out.println("Mid Term score: " + S2.getFinalExam());


System.out.println(S2.toString());

}
}

Output:

successs case output.
Kyrie, I.
1234567
Score 1:20.0
Score 2:5.0
Score 3:15.0
Score 4:0.0
Mid Term score: 20.0
Mid Term score: 70.0
Kyrie, I., 1234567, 20.0, 5.0, 15.0, 0.0, 20.0, 70.0
failure case output.
Student name doesn't match the criteria.

Student Id doesn't match the criteria.

0000000
Quiz score couldn't be set.

Quiz score couldn't be set.

Quiz score couldn't be set.

Score 1:0.0
Score 2:0.0
Score 3:15.0
Score 4:0.0
Mid term score could not be set.

Mid term score could not be set.

Mid Term score: 0.0
Final score could not be set.

Final score could not be set.

Mid Term score: 0.0
NewStudent, A., 0000000, 0.0, 0.0, 15.0, 0.0, 0.0, 0.0

Screen Shot: