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。

您好！对于您的问题，我可以为您提供一个基本的实现示例。请注意，以下示例使用Derby数据库和JDBC API进行操作。

首先，您需要创建一个名为"students"的表，包括学号（id）、姓名（name）、年龄（age）和班级（class）字段。可以使用以下SQL语句创建该表：

CREATE TABLE students (
  id INT PRIMARY KEY,
  name VARCHAR(50),
  age INT,
  class VARCHAR(50)
);

接下来，您可以使用Java编写一个程序来连接数据库，并实现写入、读取、修改和查询学生信息的功能。以下是一个示例代码：

import java.sql.*;

public class StudentDatabase {
    private static final String DB_URL = "jdbc:derby:studentDB;create=true";
    private static final String DB_USER = "username";
    private static final String DB_PASSWORD = "password";

    public static void main(String[] args) {
        try (Connection connection = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD)) {
            // 创建表
            createTable(connection);

            // 写入学生信息
            insertStudent(connection, 1, "张三", 20, "Class A");
            insertStudent(connection, 2, "李四", 21, "Class B");

            // 查询学生信息
            Student student1 = getStudent(connection, 1);
            System.out.println("学号：" + student1.getId());
            System.out.println("姓名：" + student1.getName());
            System.out.println("年龄：" + student1.getAge());
            System.out.println("班级：" + student1.getClass());

            // 修改学生信息
            updateStudent(connection, 2, "王五", 22, "Class C");

            // 查询修改后的学生信息
            Student student2 = getStudent(connection, 2);
            System.out.println("学号：" + student2.getId());
            System.out.println("姓名：" + student2.getName());
            System.out.println("年龄：" + student2.getAge());
            System.out.println("班级：" + student2.getClass());

            // 删除学生信息
            deleteStudent(connection, 1);
            deleteStudent(connection, 2);
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }

    private static void createTable(Connection connection) throws SQLException {
        String sql = "CREATE TABLE students (id INT PRIMARY KEY, name VARCHAR(50), age INT, class VARCHAR(50))";
        try (Statement statement = connection.createStatement()) {
            statement.execute(sql);
        }
    }

    private static void insertStudent(Connection connection, int id, String name, int age, String className) throws SQLException {
        String sql = "INSERT INTO students (id, name, age, class) VALUES (?, ?, ?, ?)";
        try (PreparedStatement statement = connection.prepareStatement(sql)) {
            statement.setInt(1, id);
            statement.setString(2, name);
            statement.setInt(3, age);
            statement.setString(4, className);
            statement.executeUpdate();
        }
    }

    private static Student getStudent(Connection connection, int id) throws SQLException {
        String sql = "SELECT * FROM students WHERE id = ?";
        try (PreparedStatement statement = connection.prepareStatement(sql)) {
            statement.setInt(1, id);
            try (ResultSet resultSet = statement.executeQuery()) {
                if (resultSet.next()) {
                    int studentId = resultSet.getInt("id");
                    String name = resultSet.getString("name");
                    int age = resultSet.getInt("age");
                    String className = resultSet.getString("class");
                    return new Student(studentId, name, age, className);
                }
            }
        }
        return null;
    }

    private static void updateStudent(Connection connection, int id, String name, int age, String className) throws SQLException {
        String sql = "UPDATE students SET name = ?, age = ?, class = ? WHERE id = ?";
        try (PreparedStatement statement = connection.prepareStatement(sql)) {
            statement.setString(1, name);
            statement.setInt(2, age);
            statement.setString(3, className);
            statement.setInt(4, id);
            statement.executeUpdate();
        }
    }

    private static void deleteStudent(Connection connection, int id) throws SQLException {
        String sql = "DELETE FROM students WHERE id = ?";
        try (PreparedStatement statement = connection.prepareStatement(sql)) {
            statement.setInt(1, id);
            statement.executeUpdate();
        }
    }

    private static class Student {
        private int id;
        private String name;
        private int age;
        private String className;

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

        public int getId() {
            return id;
        }

        public String getName() {
            return name;
        }

        public int getAge() {
            return age;
        }

        public String getClass() {
            return className;
        }
    }
}

请确保在运行代码之前，将数据库连接URL中的"username"和"password"替换为您的数据库用户名和密码。

通过运行上述代码，您可以连接数据库并执行写入、读取、修改和查询学生信息的操作。

希望这能帮助到您！如果有任何问题，请随时向我提问。