Java用高级控件制作注册页面

Java中常用的高级控件有Swing和JavaFX，下面分别介绍如何用这两个控件制作注册页面。

1. 使用Swing

Swing是Java中最经典的GUI库之一，下面是使用Swing实现注册页面的示例代码：

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

public class RegisterFrame extends JFrame implements ActionListener {
    private JTextField usernameField;
    private JPasswordField passwordField;
    private JPasswordField confirmPasswordField;
    private JButton registerButton;

    public RegisterFrame() {
        super("注册页面");
        setSize(400, 300);
        setLocationRelativeTo(null);
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        JPanel panel = new JPanel(new GridLayout(4, 2, 10, 10));
        panel.setBorder(BorderFactory.createEmptyBorder(10, 10, 10, 10));
        JLabel usernameLabel = new JLabel("用户名：");
        panel.add(usernameLabel);
        usernameField = new JTextField();
        panel.add(usernameField);
        JLabel passwordLabel = new JLabel("密码：");
        panel.add(passwordLabel);
        passwordField = new JPasswordField();
        panel.add(passwordField);
        JLabel confirmPasswordLabel = new JLabel("确认密码：");
        panel.add(confirmPasswordLabel);
        confirmPasswordField = new JPasswordField();
        panel.add(confirmPasswordField);
        registerButton = new JButton("注册");
        registerButton.addActionListener(this);
        panel.add(registerButton);

        add(panel);
        setVisible(true);
    }

    @Override
    public void actionPerformed(ActionEvent e) {
        if (e.getSource() == registerButton) {
            String username = usernameField.getText();
            String password = new String(passwordField.getPassword());
            String confirmPassword = new String(confirmPasswordField.getPassword());
            if (username.isEmpty() || password.isEmpty() || confirmPassword.isEmpty()) {
                JOptionPane.showMessageDialog(this, "用户名和密码不能为空！", "错误", JOptionPane.ERROR_MESSAGE);
            } else if (!password.equals(confirmPassword)) {
                JOptionPane.showMessageDialog(this, "两次输入的密码不一致！", "错误", JOptionPane.ERROR_MESSAGE);
            } else {
                // 执行注册操作
                JOptionPane.showMessageDialog(this, "注册成功！", "成功", JOptionPane.INFORMATION_MESSAGE);
            }
        }
    }

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

2. 使用JavaFX

JavaFX是Java中比较新的GUI库，使用起来更加现代化和简洁。下面是使用JavaFX实现注册页面的示例代码：

import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.geometry.Insets;
import javafx.scene.Scene;
import javafx.scene.control.*;
import javafx.scene.layout.GridPane;
import javafx.stage.Stage;

public class RegisterApp extends Application implements EventHandler<ActionEvent> {
    private TextField usernameField;
    private PasswordField passwordField;
    private PasswordField confirmPasswordField;

    @Override
    public void start(Stage primaryStage) throws Exception {
        primaryStage.setTitle("注册页面");

        GridPane grid = new GridPane();
        grid.setPadding(new Insets(10, 10, 10, 10));
        grid.setVgap(10);
        grid.setHgap(10);

        Label usernameLabel = new Label("用户名：");
        grid.add(usernameLabel, 0, 0);
        usernameField = new TextField();
        grid.add(usernameField, 1, 0);

        Label passwordLabel = new Label("密码：");
        grid.add(passwordLabel, 0, 1);
        passwordField = new PasswordField();
        grid.add(passwordField, 1, 1);

        Label confirmPasswordLabel = new Label("确认密码：");
        grid.add(confirmPasswordLabel, 0, 2);
        confirmPasswordField = new PasswordField();
        grid.add(confirmPasswordField, 1, 2);

        Button registerButton = new Button("注册");
        registerButton.setOnAction(this);
        grid.add(registerButton, 1, 3);

        Scene scene = new Scene(grid, 400, 300);
        primaryStage.setScene(scene);
        primaryStage.show();
    }

    @Override
    public void handle(ActionEvent event) {
        if (event.getSource() instanceof Button) {
            String username = usernameField.getText();
            String password = passwordField.getText();
            String confirmPassword = confirmPasswordField.getText();
            if (username.isEmpty() || password.isEmpty() || confirmPassword.isEmpty()) {
                Alert alert = new Alert(Alert.AlertType.ERROR);
                alert.setTitle("错误");
                alert.setHeaderText("用户名和密码不能为空！");
                alert.showAndWait();
            } else if (!password.equals(confirmPassword)) {
                Alert alert = new Alert(Alert.AlertType.ERROR);
                alert.setTitle("错误");
                alert.setHeaderText("两次输入的密码不一致！");
                alert.showAndWait();
            } else {
                // 执行注册操作
                Alert alert = new Alert(Alert.AlertType.INFORMATION);
                alert.setTitle("成功");
                alert.setHeaderText("注册成功！");
                alert.showAndWait();
            }
        }
    }

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

以上就是使用Swing和JavaFX制作Java注册页面的示例代码，需要注意的是，实际开发中需要根据具体需求进行适当的修改和完善。