Bagaimana untuk menggunakan Java untuk melaksanakan sistem analisis trend skor ujian pelajar yang mudah?

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);
    }
}