Task 3

src/main/java/task_3/EmptyCoursesException.java

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+package task_3;
+
+public class EmptyCoursesException extends Exception{
+    public EmptyCoursesException(String message) {
+        super(message);
+    }
+}

src/main/java/task_3/SimpsonsCharacter.java

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+package task_3;
+
+
+import java.util.List;
+public class SimpsonsCharacter {
+    private String name;
+    private int age;
+    private int characterId;
+    private List<SimpsonsCourse> enrolledCourses;
+    private List<SimpsonsGrade> grades;
+
+    public SimpsonsCharacter(String name, int age, int characterId, List<SimpsonsCourse> enrolledCourses, List<SimpsonsGrade> grades) {
+        setName(name);
+        setAge(age);
+        setCharacterId(characterId);
+        setEnrolledCourses(enrolledCourses);
+        setGrades(grades);
+    }
+
+    public SimpsonsCharacter() {
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public void setName(String name) {
+        this.name = name;
+    }
+
+    public int getAge() {
+        return age;
+    }
+
+    public void setAge(int age) {
+        this.age = age;
+    }
+
+    public int getCharacterId() {
+        return characterId;
+    }
+
+    public void setCharacterId(int characterId) {
+        this.characterId = characterId;
+    }
+
+    public List<SimpsonsCourse> getEnrolledCourses() {
+        return enrolledCourses;
+    }
+
+    public void setEnrolledCourses(List<SimpsonsCourse> enrolledCourses) {
+        this.enrolledCourses = enrolledCourses;
+    }
+
+    public List<SimpsonsGrade> getGrades() {
+        return grades;
+    }
+
+    public void setGrades(List<SimpsonsGrade> grades) {
+        this.grades = grades;
+    }
+}

src/main/java/task_3/SimpsonsCourse.java

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+package task_3;
+public class SimpsonsCourse {
+    private String courseName;
+    private int courseId;
+
+    public SimpsonsCourse() {
+    }
+
+    public SimpsonsCourse(String courseName, int courseId) {
+        setCourseName(courseName);
+        setCourseId(courseId);
+    }
+
+    public String getCourseName() {
+        return courseName;
+    }
+
+    public void setCourseName(String courseName) {
+        this.courseName = courseName;
+    }
+
+    public int getCourseId() {
+        return courseId;
+    }
+
+    public void setCourseId(int courseId) {
+        this.courseId = courseId;
+    }
+}

src/main/java/task_3/SimpsonsGrade.java

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+package task_3;
+
+public class SimpsonsGrade {
+    private SimpsonsCourse course;
+    private SimpsonsCharacter character;
+    private int gradeValue;
+
+    public SimpsonsGrade() {
+    }
+
+    public SimpsonsGrade(SimpsonsCourse course, SimpsonsCharacter character, int gradeValue) {
+        setCourse(course);
+        setCharacter(character);
+        setGradeValue(gradeValue);
+    }
+
+    public SimpsonsCourse getCourse() {
+        return course;
+    }
+
+    public void setCourse(SimpsonsCourse course) {
+        this.course = course;
+    }
+
+    public SimpsonsCharacter getCharacter() {
+        return character;
+    }
+
+    public void setCharacter(SimpsonsCharacter character) {
+        this.character = character;
+    }
+
+    public int getGradeValue() {
+        return gradeValue;
+    }
+
+    public void setGradeValue(int gradeValue) {
+        if (gradeValue<=0 || gradeValue>5) {
+            throw new IllegalArgumentException("Оценка должна быть от 1 до 5");
+        }
+        this.gradeValue = gradeValue;
+    }
+}

src/main/java/task_3/SimpsonsSchool.java

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+package task_3;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Map;
+
+public class SimpsonsSchool {
+  //  private List<SimpsonsGrade> simpsonsGradeList = new ArrayList<>();
+    private List<SimpsonsCharacter> characterList = new ArrayList<>();
+    private List<SimpsonsCourse> courseList = new ArrayList<>();
+
+    public static void main(String[] args) {
+        SimpsonsSchool school = new SimpsonsSchool();
+        school.characterList.add(new SimpsonsCharacter("Ivan", 25, 1, new ArrayList<>(), new ArrayList<>()));
+        school.characterList.add(new SimpsonsCharacter("Petr", 24, 1, new ArrayList<>(), new ArrayList<>()));
+        school.characterList.add(new SimpsonsCharacter("Alexandr", 26, 1, new ArrayList<>(), new ArrayList<>()));
+        school.courseList.add(new SimpsonsCourse("Math", 1));
+        school.courseList.add(new SimpsonsCourse("Science", 2));
+        school.courseList.add(new SimpsonsCourse("Music", 3));
+        school.courseList.add(new SimpsonsCourse("History", 4));
+        for (SimpsonsCharacter character : school.characterList) {
+            school.enrollCharacter(character, school.courseList);
+        }
+
+            school.addGrade(school.characterList.get(1), school.courseList.get(0), 4);
+            school.addGrade(school.characterList.get(1), school.courseList.get(1), 3);
+            school.addGrade(school.characterList.get(1), school.courseList.get(2), 6);
+            school.addGrade(school.characterList.get(1), school.courseList.get(3), 1);
+        try {
+            school.getCharacterTranscript(school.characterList.get(1));
+        } catch (EmptyCoursesException e) {
+            throw new RuntimeException(e);
+        }
+
+
+    }
+
+    public void enrollCharacter(SimpsonsCharacter character, List<SimpsonsCourse> courses) {
+        character.setEnrolledCourses(courses);
+    }
+
+    public void addGrade(SimpsonsCharacter character, SimpsonsCourse course, int gradeValue) {
+        try{
+            character.getGrades().add(new SimpsonsGrade(course, character, gradeValue));
+        } catch (IllegalArgumentException e) {
+            System.out.println(e.getMessage());
+            e.printStackTrace();
+        }
+        //simpsonsGradeList.add(new SimpsonsGrade(course, character, gradeValue));
+    }
+
+    public void getCharacterTranscript(SimpsonsCharacter character) throws EmptyCoursesException {
+        if (character.getEnrolledCourses().isEmpty()) {
+            throw new EmptyCoursesException("Список курсов у " +  character.getName() + " пуст");
+        }
+        System.out.println(character.getName() + " записан на предметы:");
+        for (SimpsonsGrade simpsonsGrade : character.getGrades()) {
+            if (simpsonsGrade.getCharacter().equals(character)) {
+                System.out.print(simpsonsGrade.getCourse().getCourseName() + " - ");
+                System.out.print("Оценка - " + simpsonsGrade.getGradeValue() + ";");
+                System.out.println();
+            }
+        }
+
+    }
+}