使用Derby数据库或者其它数据库，在数据库中，设计一张表，包括学号、姓名、年龄、班级等信息。使用Java编程，连接该数据库，写入、读出、修改、查询学生信息。

好的，以下是使用Derby数据库实现你所描述的功能的示例代码：

import java.sql.*;

public class StudentDatabase {
    private Connection connection;
    private Statement statement;

    public void connect() {
        try {
            // 连接到Derby数据库
            connection = DriverManager.getConnection("jdbc:derby:studentDB;create=true");
            statement = connection.createStatement();

            // 创建学生表
            String createTableQuery = "CREATE TABLE Students ("
                    + "id INT PRIMARY KEY GENERATED ALWAYS AS IDENTITY,"
                    + "studentNumber INT,"
                    + "name VARCHAR(50),"
                    + "age INT,"
                    + "class VARCHAR(50)"
                    + ")";
            statement.executeUpdate(createTableQuery);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public void insertStudent(int studentNumber, String name, int age, String className) {
        try {
            // 插入学生信息
            String insertQuery = "INSERT INTO Students (studentNumber, name, age, class) VALUES (?, ?, ?, ?)";
            PreparedStatement preparedStatement = connection.prepareStatement(insertQuery);
            preparedStatement.setInt(1, studentNumber);
            preparedStatement.setString(2, name);
            preparedStatement.setInt(3, age);
            preparedStatement.setString(4, className);
            preparedStatement.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public void updateStudent(int studentNumber, String newName) {
        try {
            // 更新学生姓名
            String updateQuery = "UPDATE Students SET name = ? WHERE studentNumber = ?";
            PreparedStatement preparedStatement = connection.prepareStatement(updateQuery);
            preparedStatement.setString(1, newName);
            preparedStatement.setInt(2, studentNumber);
            preparedStatement.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public void deleteStudent(int studentNumber) {
        try {
            // 删除学生信息
            String deleteQuery = "DELETE FROM Students WHERE studentNumber = ?";
            PreparedStatement preparedStatement = connection.prepareStatement(deleteQuery);
            preparedStatement.setInt(1, studentNumber);
            preparedStatement.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public void queryStudent(int studentNumber) {
        try {
            // 查询学生信息
            String selectQuery = "SELECT * FROM Students WHERE studentNumber = ?";
            PreparedStatement preparedStatement = connection.prepareStatement(selectQuery);
            preparedStatement.setInt(1, studentNumber);
            ResultSet resultSet = preparedStatement.executeQuery();

            // 打印查询结果
            if (resultSet.next()) {
                int id = resultSet.getInt("id");
                String name = resultSet.getString("name");
                int age = resultSet.getInt("age");
                String className = resultSet.getString("class");

                System.out.println("ID: " + id);
                System.out.println("Name: " + name);
                System.out.println("Age: " + age);
                System.out.println("Class: " + className);
            } else {
                System.out.println("No student found with student number: " + studentNumber);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public void close() {
        try {
            // 关闭连接
            statement.close();
            connection.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    public static void main(String[] args) {
        StudentDatabase studentDatabase = new StudentDatabase();
        studentDatabase.connect();

        // 插入学生信息
        studentDatabase.insertStudent(1001, "张三", 20, "Class A");
        studentDatabase.insertStudent(1002, "李四", 21, "Class B");

        // 查询学生信息
        studentDatabase.queryStudent(1001);
        studentDatabase.queryStudent(1002);

        // 更新学生信息
        studentDatabase.updateStudent(1001, "王五");

        // 查询学生信息
        studentDatabase.queryStudent(1001);

        // 删除学生信息
        studentDatabase.deleteStudent(1002);

        // 查询学生信息
        studentDatabase.queryStudent(1002);

        studentDatabase.close();
    }
}

这个示例代码通过Java连接Derby数据库，创建了一个名为"Students"的表，包括学号、姓名、年龄、班级等字段。然后提供了插入、查询、更新和删除学生信息的方法，最后演示了如何使用这些方法。请根据你的需求进行修改和扩展。