用Java GUI写一个学生选课管理系统包括增加，删除，修改，查询等功能有管理员界面和学生信息界面

好的，这是一个比较复杂的任务。建议您按照以下步骤进行：

1. 设计数据库表结构，包括学生表、课程表、选课表等。

2. 使用Java GUI框架（如Swing或JavaFX）进行界面设计。可以参考一些开源的学生选课管理系统的界面设计，如GitHub上的"student-course-selection"项目。

3. 在Java代码中实现增加、删除、修改、查询等功能。可以使用JDBC连接数据库进行数据操作。

4. 设计管理员界面和学生信息界面，根据用户类型进行权限控制。

5. 对系统进行测试和调试，确保功能正常。

下面是一个简单的Java GUI代码示例，实现了一个基本的学生信息管理系统：

import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
import java.sql.*;

public class StudentManagementSystem extends JFrame implements ActionListener {
    private JTextField nameField, idField, majorField;
    private JComboBox<String> genderBox;
    private JButton addButton, deleteButton, updateButton, queryButton;
    private JTable table;

    public StudentManagementSystem() {
        setTitle("学生信息管理系统");
        setSize(800, 600);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        JPanel inputPanel = new JPanel(new GridLayout(5, 2));
        inputPanel.add(new JLabel("姓名："));
        nameField = new JTextField(20);
        inputPanel.add(nameField);
        inputPanel.add(new JLabel("学号："));
        idField = new JTextField(20);
        inputPanel.add(idField);
        inputPanel.add(new JLabel("性别："));
        genderBox = new JComboBox<>(new String[]{"男", "女"});
        inputPanel.add(genderBox);
        inputPanel.add(new JLabel("专业："));
        majorField = new JTextField(20);
        inputPanel.add(majorField);
        addButton = new JButton("添加");
        addButton.addActionListener(this);
        inputPanel.add(addButton);
        deleteButton = new JButton("删除");
        deleteButton.addActionListener(this);
        inputPanel.add(deleteButton);
        updateButton = new JButton("修改");
        updateButton.addActionListener(this);
        inputPanel.add(updateButton);
        queryButton = new JButton("查询");
        queryButton.addActionListener(this);
        inputPanel.add(queryButton);
        add(inputPanel, BorderLayout.NORTH);

        table = new JTable();
        JScrollPane scrollPane = new JScrollPane(table);
        add(scrollPane, BorderLayout.CENTER);

        setVisible(true);
    }

    public static void main(String[] args) {
        new StudentManagementSystem();
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == addButton) {
            addStudent();
        } else if (e.getSource() == deleteButton) {
            deleteStudent();
        } else if (e.getSource() == updateButton) {
            updateStudent();
        } else if (e.getSource() == queryButton) {
            queryStudent();
        }
    }

    private void addStudent() {
        String name = nameField.getText();
        String id = idField.getText();
        String gender = (String) genderBox.getSelectedItem();
        String major = majorField.getText();
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/student", "root", "root");
            String sql = "INSERT INTO student (name, id, gender, major) VALUES (?, ?, ?, ?)";
            PreparedStatement stmt = conn.prepareStatement(sql);
            stmt.setString(1, name);
            stmt.setString(2, id);
            stmt.setString(3, gender);
            stmt.setString(4, major);
            stmt.executeUpdate();
            JOptionPane.showMessageDialog(this, "添加成功！");
            stmt.close();
            conn.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
            JOptionPane.showMessageDialog(this, "添加失败！");
        }
    }

    private void deleteStudent() {
        int rowIndex = table.getSelectedRow();
        if (rowIndex == -1) {
            JOptionPane.showMessageDialog(this, "请选择要删除的学生！");
            return;
        }
        String id = (String) table.getValueAt(rowIndex, 1);
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/student", "root", "root");
            String sql = "DELETE FROM student WHERE id = ?";
            PreparedStatement stmt = conn.prepareStatement(sql);
            stmt.setString(1, id);
            stmt.executeUpdate();
            JOptionPane.showMessageDialog(this, "删除成功！");
            stmt.close();
            conn.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
            JOptionPane.showMessageDialog(this, "删除失败！");
        }
    }

    private void updateStudent() {
        int rowIndex = table.getSelectedRow();
        if (rowIndex == -1) {
            JOptionPane.showMessageDialog(this, "请选择要修改的学生！");
            return;
        }
        String name = nameField.getText();
        String id = idField.getText();
        String gender = (String) genderBox.getSelectedItem();
        String major = majorField.getText();
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/student", "root", "root");
            String sql = "UPDATE student SET name = ?, gender = ?, major = ? WHERE id = ?";
            PreparedStatement stmt = conn.prepareStatement(sql);
            stmt.setString(1, name);
            stmt.setString(2, gender);
            stmt.setString(3, major);
            stmt.setString(4, id);
            stmt.executeUpdate();
            JOptionPane.showMessageDialog(this, "修改成功！");
            stmt.close();
            conn.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
            JOptionPane.showMessageDialog(this, "修改失败！");
        }
    }

    private void queryStudent() {
        try {
            Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/student", "root", "root");
            String sql = "SELECT * FROM student";
            Statement stmt = conn.createStatement();
            ResultSet rs = stmt.executeQuery(sql);
            ResultSetMetaData metaData = rs.getMetaData();
            int columnCount = metaData.getColumnCount();
            Object[][] data = new Object[100][columnCount];
            int rowIndex = 0;
            while (rs.next()) {
                for (int i = 1; i <= columnCount; i++) {
                    data[rowIndex][i - 1] = rs.getObject(i);
                }
                rowIndex++;
            }
            Object[] columns = new Object[columnCount];
            for (int i = 1; i <= columnCount; i++) {
                columns[i - 1] = metaData.getColumnName(i);
            }
            table.setModel(new DefaultTableModel(data, columns));
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException ex) {
            ex.printStackTrace();
            JOptionPane.showMessageDialog(this, "查询失败！");
        }
    }
}