java 交互界面

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

public class LoginFrame extends JFrame {
    private JLabel accountLabel;
    private JLabel passwordLabel;
    private JLabel captchaLabel;
    private JTextField accountTextField;
    private JPasswordField passwordField;
    private JTextField captchaTextField;
    private JButton loginButton;

    public LoginFrame() {
        setTitle("使用");
        setSize(400, 300);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setLocationRelativeTo(null); // 居中显示

        // 创建账号输入框
        accountLabel = new JLabel("账号");
        accountTextField = new JTextField(20);

        // 创建密码输入框
        passwordLabel = new JLabel("密码");
        passwordField = new JPasswordField(20);

        // 创建验证码输入框和生成按钮
        captchaLabel = new JLabel("Captcha:");
        captchaTextField = new JTextField(10);
        JButton generateCaptchaButton = new JButton("Generate");

        // 创建登录按钮
        loginButton = new JButton("登录");

        // 生成验证码按钮的事件处理
        generateCaptchaButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                generateCaptcha();
            }
        });

        // 登录按钮的事件处理
        loginButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                String account = accountTextField.getText();
                String password = String.valueOf(passwordField.getPassword());
                String captcha = captchaTextField.getText();

                // 在此处添加验证逻辑，比较账号、密码和验证码的正确性
                // ...

                // 示例：简单地在控制台打印输入的账号、密码和验证码
                System.out.println("Account: " + account);
                System.out.println("Password: " + password);
                System.out.println("Captcha: " + captcha);
            }
        });

        // 使用布局管理器设置界面布局
        setLayout(new GridBagLayout());
        GridBagConstraints gbc = new GridBagConstraints();
        gbc.gridx = 0;
        gbc.gridy = 0;
        gbc.insets = new Insets(10, 10, 10, 10);
        gbc.anchor = GridBagConstraints.WEST;

        add(accountLabel, gbc);
        gbc.gridy++;
        add(passwordLabel, gbc);
        gbc.gridy++;
        add(captchaLabel, gbc);

        gbc.gridx = 1;
        gbc.gridy = 0;
        add(accountTextField, gbc);
        gbc.gridy++;
        add(passwordField, gbc);
        gbc.gridy++;
        add(captchaTextField, gbc);

        gbc.gridx = 2;
        gbc.gridy = 2;
        add(generateCaptchaButton, gbc);
        gbc.gridy++;
        add(loginButton, gbc);
    }

    // 生成随机验证码的方法
    private void generateCaptcha() {
        String chars = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
        StringBuilder sb = new StringBuilder();
        Random random = new Random();

        for (int i = 0; i < 6; i++) {
            int index = random.nextInt(chars.length());
            sb.append(chars.charAt(index));
        }

        captchaTextField.setText(sb.toString());
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            public void run() {
                LoginFrame frame = new LoginFrame();
                frame.setVisible(true);
            }
        });
    }
}