帮我写一个带窗口的java学生管理系统

好的，下面我给你提供一个简单的带窗口的Java学生管理系统的代码，帮助你开始：

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JOptionPane;
import javax.swing.JPanel;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.JTextField;
import javax.swing.table.DefaultTableModel;

public class StudentManagementSystem extends JFrame {

    private JPanel contentPane;
    private JTextField textFieldName;
    private JTextField textFieldID;
    private JTextField textFieldMajor;
    private JTable table;
    private DefaultTableModel model;
    private List<Student> students = new ArrayList<>();

    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable() {
            public void run() {
                try {
                    StudentManagementSystem frame = new StudentManagementSystem();
                    frame.setVisible(true);
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        });
    }

    public StudentManagementSystem() {
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setBounds(100, 100, 450, 300);
        contentPane = new JPanel();
        contentPane.setBorder(null);
        setContentPane(contentPane);
        contentPane.setLayout(null);

        JLabel lblName = new JLabel("姓名：");
        lblName.setBounds(10, 10, 60, 15);
        contentPane.add(lblName);

        JLabel lblID = new JLabel("学号：");
        lblID.setBounds(10, 35, 60, 15);
        contentPane.add(lblID);

        JLabel lblMajor = new JLabel("专业：");
        lblMajor.setBounds(10, 60, 60, 15);
        contentPane.add(lblMajor);

        textFieldName = new JTextField();
        textFieldName.setBounds(70, 10, 100, 21);
        contentPane.add(textFieldName);
        textFieldName.setColumns(10);

        textFieldID = new JTextField();
        textFieldID.setBounds(70, 35, 100, 21);
        contentPane.add(textFieldID);
        textFieldID.setColumns(10);

        textFieldMajor = new JTextField();
        textFieldMajor.setBounds(70, 60, 100, 21);
        contentPane.add(textFieldMajor);
        textFieldMajor.setColumns(10);

        JButton btnAdd = new JButton("添加");
        btnAdd.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String name = textFieldName.getText();
                String id = textFieldID.getText();
                String major = textFieldMajor.getText();
                if (name.isEmpty() || id.isEmpty() || major.isEmpty()) {
                    JOptionPane.showMessageDialog(StudentManagementSystem.this, "请填写完整信息", "错误", JOptionPane.ERROR_MESSAGE);
                    return;
                }
                Student student = new Student(name, id, major);
                students.add(student);
                model.addRow(new Object[]{student.getName(), student.getId(), student.getMajor()});
                textFieldName.setText("");
                textFieldID.setText("");
                textFieldMajor.setText("");
            }
        });
        btnAdd.setBounds(205, 10, 80, 25);
        contentPane.add(btnAdd);

        JButton btnDelete = new JButton("删除");
        btnDelete.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                int row = table.getSelectedRow();
                if (row == -1) {
                    JOptionPane.showMessageDialog(StudentManagementSystem.this, "请选择要删除的学生", "错误", JOptionPane.ERROR_MESSAGE);
                    return;
                }
                students.remove(row);
                model.removeRow(row);
            }
        });
        btnDelete.setBounds(205, 35, 80, 25);
        contentPane.add(btnDelete);

        JScrollPane scrollPane = new JScrollPane();
        scrollPane.setBounds(10, 85, 414, 167);
        contentPane.add(scrollPane);

        table = new JTable();
        model = new DefaultTableModel(new Object[][]{}, new String[]{"姓名", "学号", "专业"});
        table.setModel(model);
        scrollPane.setViewportView(table);
    }

    private class Student {
        private String name;
        private String id;
        private String major;

        public Student(String name, String id, String major) {
            this.name = name;
            this.id = id;
            this.major = major;
        }

        public String getName() {
            return name;
        }

        public String getId() {
            return id;
        }

        public String getMajor() {
            return major;
        }
    }
}

这个学生管理系统包括添加学生、删除学生、以表格的形式显示所有学生等功能。你可以根据需要对代码进行修改和扩展。