javaswing的登陆注册

Java Swing 是一个用于创建桌面应用程序的GUI工具包。下面是一个简单的Java Swing登录和注册界面的示例代码：

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

public class LoginRegisterGUI extends JFrame implements ActionListener {

    private JLabel labelUsername, labelPassword, labelFirstName, labelLastName, labelConfirmPassword;
    private JTextField tfUsername, tfFirstName, tfLastName;
    private JPasswordField pfPassword, pfConfirmPassword;
    private JButton loginButton, registerButton;
    private JPanel loginPanel, registerPanel;

    public LoginRegisterGUI() {
        super("Login/Register Form");

        // Create the login panel components
        labelUsername = new JLabel("Username:");
        labelPassword = new JLabel("Password:");
        tfUsername = new JTextField(20);
        pfPassword = new JPasswordField(20);
        loginButton = new JButton("Login");

        // Create the register panel components
        labelFirstName = new JLabel("First Name:");
        labelLastName = new JLabel("Last Name:");
        labelConfirmPassword = new JLabel("Confirm Password:");
        tfFirstName = new JTextField(20);
        tfLastName = new JTextField(20);
        pfConfirmPassword = new JPasswordField(20);
        registerButton = new JButton("Register");

        // Create the login panel and add components to it
        loginPanel = new JPanel(new GridLayout(3, 2));
        loginPanel.add(labelUsername);
        loginPanel.add(tfUsername);
        loginPanel.add(labelPassword);
        loginPanel.add(pfPassword);
        loginPanel.add(new JLabel(""));
        loginPanel.add(loginButton);

        // Create the register panel and add components to it
        registerPanel = new JPanel(new GridLayout(4, 2));
        registerPanel.add(labelFirstName);
        registerPanel.add(tfFirstName);
        registerPanel.add(labelLastName);
        registerPanel.add(tfLastName);
        registerPanel.add(labelUsername);
        registerPanel.add(tfUsername);
        registerPanel.add(labelConfirmPassword);
        registerPanel.add(pfConfirmPassword);
        registerPanel.add(new JLabel(""));
        registerPanel.add(registerButton);

        // Add action listeners to the buttons
        loginButton.addActionListener(this);
        registerButton.addActionListener(this);

        // Add the login panel to the frame by default
        add(loginPanel);

        // Set frame properties
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(400, 200);
        setLocationRelativeTo(null);
        setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == loginButton) {
            // Handle login button action
            String username = tfUsername.getText();
            String password = new String(pfPassword.getPassword());

            // TODO: Authenticate user

            JOptionPane.showMessageDialog(this, "Login successful", "Success", JOptionPane.INFORMATION_MESSAGE);
        } else if (e.getSource() == registerButton) {
            // Handle register button action
            String firstName = tfFirstName.getText();
            String lastName = tfLastName.getText();
            String username = tfUsername.getText();
            String password = new String(pfPassword.getPassword());
            String confirmPassword = new String(pfConfirmPassword.getPassword());

            // TODO: Validate user input and save user data

            JOptionPane.showMessageDialog(this, "Registration successful", "Success", JOptionPane.INFORMATION_MESSAGE);
        }
    }

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

这个示例中，我们创建了一个包含登录和注册表单的GUI。我们使用JPanel来创建登录面板和注册面板，每个面板都使用GridLayout来排列其组件。我们使用JLabel、JTextField、JPasswordField和JButton等Swing组件来创建表单和按钮。我们还为每个按钮添加了ActionListener，以便在用户单击按钮时调用相应的操作。在ActionListener中，我们获取用户输入的值，并根据需要执行相应的操作。最后，我们使用JOptionPane来显示成功的消息框。

需要注意的是，这只是一个简单的示例，您可能需要根据您的需求进行更改和扩展。