Java を使用して簡単な学生テストの得点傾向分析システムを実装するにはどうすればよいですか?

public class Student {
    private String name;
    private String id;
    private double score;

    // 构造方法
    public Student(String name, String id, double score) {
        this.name = name;
        this.id = id;
        this.score = score;
    }

    // 获取学生姓名
    public String getName() {
        return name;
    }

    // 获取学生学号
    public String getId() {
        return id;
    }

    // 获取学生考试成绩
    public double getScore() {
        return score;
    }
}

import java.util.ArrayList;
import java.util.List;
import java.awt.Color;
import java.awt.Graphics;
import javax.swing.JFrame;
import javax.swing.JPanel;

public class GradeAnalyzer extends JPanel {
    private List<Student> students;

    // 构造方法
    public GradeAnalyzer() {
        students = new ArrayList<>();
    }

    // 添加学生
    public void addStudent(Student student) {
        students.add(student);
    }

    // 计算平均成绩
    public double calculateAverage() {
        double sum = 0;
        for (Student student : students) {
            sum += student.getScore();
        }
        return sum / students.size();
    }

    // 绘制成绩趋势图
    public void paintComponent(Graphics g) {
        super.paintComponent(g);
        int width = getWidth();
        int height = getHeight();

        g.setColor(Color.BLUE);
        for (int i = 0; i < students.size(); i++) {
            double score = students.get(i).getScore();
            int x = (int) (i * (width / students.size()) + 0.5);
            int y = (int) ((1 - score) * height);
            g.fillOval(x, y, 4, 4);
        }
    }

    // 测试程序
    public static void main(String[] args) {
        GradeAnalyzer analyzer = new GradeAnalyzer();
        analyzer.addStudent(new Student("张三", "001", 80));
        analyzer.addStudent(new Student("李四", "002", 90));
        analyzer.addStudent(new Student("王五", "003", 70));

        double average = analyzer.calculateAverage();
        System.out.println("平均成绩：" + average);

        JFrame frame = new JFrame();
        frame.add(analyzer);
        frame.setSize(400, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        frame.setVisible(true);
    }
}