Using Java to implement the test score statistics function of the online examination system

// 学生类
class Student {
    private String name;
    private int id;

    public Student(String name, int id) {
        this.name = name;
        this.id = id;
    }

    // getter和setter方法省略...
}

// 题目类
class Question {
    private int number;
    private int score;

    public Question(int number, int score) {
        this.number = number;
        this.score = score;
    }

    // getter和setter方法省略...
}

// 考试类
class Exam {
    private List<Student> students;
    private List<Question> questions;

    public Exam(List<Student> students, List<Question> questions) {
        this.students = students;
        this.questions = questions;
    }

    // 统计每个学生的得分和总分
    public void calculateScores() {
        for (Student student : students) {
            int totalScore = 0;
            for (Question question : questions) {
                totalScore += question.getScore();
            }
            System.out.println(student.getName() + "的总分为：" + totalScore);
        }
    }

    // 统计每个学生的平均分
    public void calculateAverageScores() {
        for (Student student : students) {
            int totalScore = 0;
            for (Question question : questions) {
                totalScore += question.getScore();
            }
            double averageScore = (double) totalScore / questions.size();
            System.out.println(student.getName() + "的平均分为：" + averageScore);
        }
    }

    // 统计每个题目的得分分布情况
    public void calculateScoreDistribution() {
        Map<Integer, Integer> scoreDistribution = new HashMap<>();
        for (Question question : questions) {
            int score = question.getScore();
            if (scoreDistribution.containsKey(score)) {
                scoreDistribution.put(score, scoreDistribution.get(score) + 1);
            } else {
                scoreDistribution.put(score, 1);
            }
        }
        for (Map.Entry<Integer, Integer> entry : scoreDistribution.entrySet()) {
            System.out.println("得分为" + entry.getKey() + "的题目数量为：" + entry.getValue());
        }
    }
}

public class Main {
    public static void main(String[] args) {
        // 创建学生列表
        List<Student> students = new ArrayList<>();
        students.add(new Student("张三", 1));
        students.add(new Student("李四", 2));

        // 创建题目列表
        List<Question> questions = new ArrayList<>();
        questions.add(new Question(1, 10));
        questions.add(new Question(2, 20));

        // 创建考试对象
        Exam exam = new Exam(students, questions);

        // 统计每个学生的得分和总分
        exam.calculateScores();

        // 统计每个学生的平均分
        exam.calculateAverageScores();

        // 统计每个题目的得分分布情况
        exam.calculateScoreDistribution();
    }
}