Java Swing 实现登录买票小程序的代码

以下是一个简单的 Java Swing 实现登录买票小程序的基本代码：

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

public class TicketBookingApp extends JFrame implements ActionListener {
    private JLabel usernameLabel, passwordLabel;
    private JTextField usernameTextField;
    private JPasswordField passwordField;
    private JButton loginButton;
    
    public TicketBookingApp() {
        //设置窗口标题
        setTitle("登录买票小程序");
        
        //创建登录表单
        usernameLabel = new JLabel("用户名:");
        passwordLabel = new JLabel("密码:");
        usernameTextField = new JTextField(20);
        passwordField = new JPasswordField(20);
        loginButton = new JButton("登录");
        loginButton.addActionListener(this);
        
        //添加组件到登录表单
        JPanel panel = new JPanel(new GridLayout(3, 2));
        panel.add(usernameLabel);
        panel.add(usernameTextField);
        panel.add(passwordLabel);
        panel.add(passwordField);
        panel.add(new JLabel());
        panel.add(loginButton);
        
        //添加登录表单到窗口
        getContentPane().add(panel, BorderLayout.CENTER);
        
        //设置窗口大小和关闭行为
        setSize(300, 150);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setVisible(true);
    }
    
    @Override
    public void actionPerformed(ActionEvent e) {
        //获取用户名和密码
        String username = usernameTextField.getText().trim();
        String password = new String(passwordField.getPassword());
        
        //验证用户名和密码
        if(username.equals("admin") && password.equals("123456")) {
            //登录成功，打开买票窗口
            dispose();
            new TicketBookingWindow();
        } else {
            //登录失败，提示错误信息
            JOptionPane.showMessageDialog(this, "用户名或密码错误！", "登录失败", JOptionPane.ERROR_MESSAGE);
        }
    }
    
    public static void main(String[] args) {
        //启动应用程序
        new TicketBookingApp();
    }
}

class TicketBookingWindow extends JFrame {
    public TicketBookingWindow() {
        //设置窗口标题
        setTitle("买票");
        
        //创建买票表单
        JLabel fromLabel = new JLabel("出发地:");
        JLabel toLabel = new JLabel("目的地:");
        JLabel dateLabel = new JLabel("日期:");
        JTextField fromTextField = new JTextField(20);
        JTextField toTextField = new JTextField(20);
        JTextField dateTextField = new JTextField(20);
        JButton bookButton = new JButton("预订");
        
        //添加组件到买票表单
        JPanel panel = new JPanel(new GridLayout(4, 2));
        panel.add(fromLabel);
        panel.add(fromTextField);
        panel.add(toLabel);
        panel.add(toTextField);
        panel.add(dateLabel);
        panel.add(dateTextField);
        panel.add(new JLabel());
        panel.add(bookButton);
        
        //添加买票表单到窗口
        getContentPane().add(panel, BorderLayout.CENTER);
        
        //设置窗口大小和关闭行为
        setSize(300, 150);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null);
        setVisible(true);
    }
}

这个程序包含两个窗口：登录窗口和买票窗口。在登录窗口中，用户需要输入用户名和密码才能进入买票窗口。在买票窗口中，用户可以输入出发地、目的地和日期，然后点击预订按钮购买车票。