抽象老师，我不希望再遇见你

其一，注册登录

         

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.HashMap;

class WelcomeFrame extends JFrame {
    private JTextField studentIdField;
    private JTextField nameField;
    private JLabel messageLabel;
    private HashMap<String, String> users = new HashMap<>();

    public WelcomeFrame() {
        setTitle("欢迎界面");
        setSize(300, 200);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);

        JPanel panel = new JPanel();
        GroupLayout layout = new GroupLayout(panel);
        panel.setLayout(layout);
        layout.setAutoCreateGaps(true);
        layout.setAutoCreateContainerGaps(true);

        JLabel studentIdLabel = new JLabel("学号：");
        studentIdField = new JTextField(15);
        JLabel nameLabel = new JLabel("姓名：");
        nameField = new JTextField(15);

        JButton registerButton = new JButton("注册");
        JButton loginButton = new JButton("登录");

        messageLabel = new JLabel("Java练习", SwingConstants.CENTER);
        messageLabel.setFont(new Font("微软雅黑", Font.BOLD, 20));

        JPanel buttonPanel = new JPanel();
        buttonPanel.setLayout(new FlowLayout(FlowLayout.CENTER));
        buttonPanel.add(registerButton);
        buttonPanel.add(loginButton);

        layout.setHorizontalGroup(layout.createParallelGroup(GroupLayout.Alignment.LEADING)
                .addGroup(layout.createSequentialGroup()
                        .addComponent(studentIdLabel)
                        .addComponent(studentIdField))
                .addGroup(layout.createSequentialGroup()
                        .addComponent(nameLabel)
                        .addComponent(nameField))
                .addComponent(messageLabel)
                .addComponent(buttonPanel)
        );

        layout.setVerticalGroup(layout.createSequentialGroup()
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                        .addComponent(studentIdLabel)
                        .addComponent(studentIdField))
                .addGroup(layout.createParallelGroup(GroupLayout.Alignment.BASELINE)
                        .addComponent(nameLabel)
                        .addComponent(nameField))
                .addComponent(messageLabel)
                .addComponent(buttonPanel)
        );

        registerButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String studentId = studentIdField.getText().trim();
                String name = nameField.getText().trim();
                if (!studentId.isEmpty() && !name.isEmpty()) {
                    users.put(studentId, name); // 存储用户信息
                    messageLabel.setText(studentId + "注册成功！");
                } else {
                    messageLabel.setText("请输入学号和姓名！");
                }
            }
        });

        loginButton.addActionListener(new ActionListener() {
            public void actionPerformed(ActionEvent e) {
                String studentId = studentIdField.getText().trim();
                String name = nameField.getText().trim();
                if (users.containsKey(studentId) && users.get(studentId).equals(name)) {
                    messageLabel.setText("登录成功！");
                } else {
                    messageLabel.setText("学号或姓名不正确！");
                }
            }
        });

        add(panel);
        setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(() -> {
            WelcomeFrame frame = new WelcomeFrame();
            frame.setVisible(true);
        });
    }
}