Graded My Students

src/main/java/io/zipcoder/Classroom.java

@@ -1,4 +1,151 @@
 package io.zipcoder;
 
+import java.util.*;
+
 public class Classroom {
+
+        private Student[] students;
+        private int maxNumOfStudents;
+
+
+        public Classroom() {
+                this.students = new Student[30];
+        }
+
+        public Classroom(int maxNumOfStudents) {
+                this.students = new Student[maxNumOfStudents];
+
+        }
+
+        public Classroom(Student... students) {
+                this.students = students;
+        }
+
+        public Student[] getStudents() {
+                return students;
+        } //do I need to clone?
+
+        public double getAverageExamScore() {
+                double total = 0;
+                for (Student s : students) {
+                        total += s.getAverageExamScore();
+                }
+
+                double average = total / correctForNull();
+
+                return average;
+        }
+
+        public void addStudent(Student student) {
+                for (int i = 0; i < students.length; i++) {
+                        if (students[i] == null) {
+                                students[i] = student;
+                                break;
+                        }
+
+                }
+
+        }
+
+//                ArrayList <Student> newEnrollment = new ArrayList<>(Arrays.asList(students));
+//                        newEnrollment.add(student);
+//             this.students = newEnrollment.toArray(new Student[0]);
+
+        public void removeStudentbyName(String firstName, String lastName) {
+                ArrayList<Student> studentArray = new ArrayList<>(Arrays.asList(students));
+                for (int i = 0; i < studentArray.size(); i++) {
+                        Student student = studentArray.get(i);
+                        if (student == null) {
+                                continue;
+                        } else if (student.getFirstName().equals(firstName) && student.getLastName().equals(lastName)) {
+                                studentArray.remove(student);
+                                studentArray.add(null);
+                        }
+                }
+                this.students = studentArray.toArray(new Student[0]);
+
+        }
+//                ArrayList<Student> studentArray = new ArrayList<>(Arrays.asList(students));
+//                for (int i = 0; i < studentArray.size() ; i++) {
+//                        Student student = studentArray.get(i);
+//                        if (student.getLastName().equalsIgnoreCase(lastName) && student.getFirstName().equalsIgnoreCase(firstName)) {
+//                                studentArray.set(student);
+//                        }
+//                } studentArray.add(null);
+
+        public Student[] getStudentByScore() {
+                List<Student> studentbyScore = new ArrayList<>(Arrays.asList(students));
+
+                Comparator<Student> byExamScores = Comparator.comparing(Student::getAverageExamScore);
+                Comparator<Student> byFullName = Comparator.comparing(Student::getFullName);
+
+                studentbyScore.sort(byExamScores.reversed().thenComparing(byFullName));
+
+                return studentbyScore.toArray(new Student[0]);
+        }
+
+        public Map <Student, Character> getGradeBookMap() {
+                Student[] studentArray = students;
+                Map<Student, Character> gradeBookAssigned = new HashMap<>();
+                for (int i = 0; i < correctForNull(); i++) {
+                        gradeBookAssigned.put(studentArray[i], assignGrade(studentArray[i]));
+                }
+
+                return gradeBookAssigned;
+        }
+
+        public void getGradeBook(){
+                for (int i = 0; i < correctForNull(); i++) {
+                        char grade = assignGrade(students[i]);
+                        String name = students[i].getFullName();
+                        System.out.println(name + " ->  " + grade);
+
+                }
+        }
+
+        public char assignGrade(Student student){
+                double studentAvg = student.getAverageExamScore();
+                double classAvg = getAverageExamScore();
+                double deviation = getDeviation();
+
+                if (studentAvg >= classAvg + (2 * deviation)){
+                        return 'A';
+                } else if (studentAvg >= classAvg + deviation) {
+                        return 'B';
+                } else if (studentAvg >= classAvg){
+                        return 'C';
+                }else if (studentAvg >= classAvg - deviation){
+                        return 'D';
+                }
+                return 'F';
+        }
+
+        public double getDeviation() {
+                double deviation = 0;
+                double classAverage = getAverageExamScore();
+                for (Student s : students) {
+                        if (s == null) {
+                                deviation += 0;
+                        } else {
+                                double diff = classAverage - s.getAverageExamScore();
+                                deviation += Math.pow(diff, 2);
+                        }
+                }
+                double squaredDev = deviation / correctForNull();
+                return Math.sqrt(squaredDev);
+
+
+        }
+
+        public int correctForNull() {
+                int studentCount = 0;
+                for (Student student : students) {
+                        if (student != null) {
+                                studentCount++;
+                        }
+                }
+                return studentCount;
+
+        }
+
 }

src/main/java/io/zipcoder/Student.java

@@ -1,4 +1,79 @@
 package io.zipcoder;
 
+import java.util.ArrayList;
+import java.util.Arrays;
+
 public class Student {
+
+    private String firstName;
+    private String lastName;
+    ArrayList<Double> examScores;
+
+    public Student(String givenFirstName, String givenLastName, Double...examScores) {
+        this.firstName = givenFirstName;
+        this.lastName = givenLastName;
+        this.examScores = new ArrayList<>(Arrays.asList(examScores));
+    }
+
+    public String getFirstName() {
+        return firstName;
+    }
+
+    public void setFirstName(String firstName) {
+        this.firstName = firstName;
+    }
+
+    public String getLastName() {
+        return lastName;
+    }
+
+    public void setLastName(String lastName) {
+        this.lastName = lastName;
+    }
+
+    public String getFullName (){
+        return this.firstName + " " + this.lastName;
+    }
+
+    public Integer getNumberOfExamsTaken(){
+        return examScores.size();
+    }
+
+    public String getExamScores(){
+        String output = "Exam Scores: \n";
+
+        for (int i = 0; i < examScores.size(); i++) {
+            output += "\t Exam " + (i + 1) + " -> ";
+            output += examScores.get(i);
+            output += "\n";
+
+        }
+        return output;
+    }
+
+    public void addExamScore(double score){
+        examScores.add(score);
+    }
+
+    public void setExamScore(int testNumber, double newScore){
+        examScores.remove(testNumber-1);
+        examScores.add(testNumber-1, newScore);
+    }
+
+    public Double getAverageExamScore(){
+        double total = 0;
+        for (double score: examScores) {
+             total += score;
+            }
+        Double avg = total/examScores.size();
+
+        return avg;
+    }
+
+    @Override
+    public String toString(){
+        return String.format("Student Name: %s %s\n" + "> Average Score: %.1f \n" + "> %s", firstName, lastName, getAverageExamScore(), getExamScores());
+    }
+
+
 }