This assignment is built on top of Assignment 2.

Add capability to handle Grade Book for different subjects (Chemistry and Computer Science).

We will assume a maximum of five assignments and up to 40 students.

Details will be provided in the class.

This is my code from assignment 2:

import java.io.Serializable; public class Student implements Serializable { private int Stud; private int Qu1; private int Qu2; private int Qu3; private int Qu4; private int Qu5; public Student(int stud, int qu1, int qu2, int qu3, int qu4, int qu5) { Stud = stud; Qu1 = qu1; Qu2 = qu2; Qu3 = qu3; Qu4 = qu4; Qu5 = qu5; }

public int getStud() { return Stud; }

public void setStud(int stud) { Stud = stud; }

public int getQu1() { return Qu1; }

public void setQu1(int qu1) { Qu1 = qu1; }

public int getQu2() { return Qu2; }

public void setQu2(int qu2) { Qu2 = qu2; }

public int getQu3() { return Qu3; }

public void setQu3(int qu3) { Qu3 = qu3; }

public int getQu4() { return Qu4; }

public void setQu4(int qu4) { Qu4 = qu4; }

public int getQu5() { return Qu5; }

public void setQu5(int qu5) { Qu5 = qu5; } public String toString() { return Stud + " " + Qu1 + " " + Qu2 + " " + Qu3 + " " + Qu4 + " " + Qu5; } }

// StudentTest.java import java.io.*; public class StudentTest { public static final long serialVersionUID = 42L;

public static void main(String[] args) throws IOException, ClassNotFoundException { Student[] students = new Student[15];

students[0] = new Student(1234, 52, 7, 100, 78, 34); students[1] = new Student(2134, 90, 36, 90, 77, 30); students[2] = new Student(3124, 100, 45, 20, 90, 70); students[3] = new Student(4532, 11, 17, 81, 32, 77); students[4] = new Student(5678, 20, 12, 45, 78, 34); students[5] = new Student(6134, 34, 80, 55, 78, 45); students[6] = new Student(7874, 60, 100, 56, 78, 78); students[7] = new Student(8026, 70, 10, 66, 78, 56); students[8] = new Student(9893, 34, 9, 77, 78, 20); students[9] = new Student(1947, 45, 40, 88, 78, 55); students[10] = new Student(2877, 55, 50, 99, 78, 80); students[11] = new Student(3189, 22, 70, 100, 78, 77); students[12] = new Student(4602, 89, 50, 91, 78, 60); students[13] = new Student(5405, 11, 11, 0, 78, 10); students[14] = new Student(6999, 0, 98, 89, 78, 20);

FileOutputStream fos = new FileOutputStream("scores.txt"); ObjectOutputStream oos = new ObjectOutputStream(fos);

for(int i = 0; i < students.length; i++) { oos.writeObject(students[i]); }

oos.close(); fos.close();

int count = 0; int max1 = 0, min1 = 0; double sum1 = 0; int max2 = 0, min2 = 0; double sum2 = 0; int max3 = 0, min3 = 0; double sum3 = 0; int max4 = 0, min4 = 0; double sum4 = 0; int max5 = 0, min5 = 0; double sum5 = 0; FileInputStream fis = new FileInputStream("scores.txt"); ObjectInputStream ois = new ObjectInputStream(fis);

while(true) { try { Student st = (Student)ois.readObject(); count++; if(count == 1) { max1 = st.getQu1(); min1 = st.getQu1(); max2 = st.getQu2(); min2 = st.getQu2(); max3 = st.getQu3(); min3 = st.getQu3(); max4 = st.getQu4(); min4 = st.getQu4(); max5 = st.getQu5(); min5 = st.getQu5(); } else { if(st.getQu1() > max1) max1 = st.getQu1(); if(st.getQu2() > max2) max2 = st.getQu2(); if(st.getQu3() > max3) max3 = st.getQu3(); if(st.getQu4() > max4) max4 = st.getQu4(); if(st.getQu5() > max5) max5 = st.getQu5(); if(st.getQu1() < min1) min1 = st.getQu1(); if(st.getQu2() < min2) min2 = st.getQu2(); if(st.getQu3() < min3) min3 = st.getQu3(); if(st.getQu4() < min4) min4 = st.getQu4(); if(st.getQu5() < min5) min5 = st.getQu5(); } sum1 += st.getQu1(); sum2 += st.getQu2(); sum3 += st.getQu3(); sum4 += st.getQu4(); sum5 += st.getQu5(); } catch(EOFException e) { break; } }

ois.close(); fis.close(); System.out.printf("%-12s%6d%6d%6d%6d%6d ", "High Score", max1, max2, max3, max4, max5); System.out.printf("%-12s%6d%6d%6d%6d%6d ", "Low Score", min1, min2, min3, min5, min5); System.out.printf("%-12s%6.1f%6.1f%6.1f%6.1f%6.1f ", "Average", sum1/count, sum2/count, sum3/count, sum4/count, sum5/count); } }