猫头虎分享：如何使用 Java 的 Swing 组件创建一个简单的网站导航界面？

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.net.URI;
import java.awt.Desktop;

public class WebsiteNavigator {
    public static void main(String[] args) {
        // 创建一个主窗口
        JFrame frame = new JFrame("网站导航界面");
        frame.setSize(400, 300);
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);

        // 调用方法构建界面
        createUI(frame);

        // 设置窗口可见
        frame.setVisible(true);
    }
}

private static void createUI(JFrame frame) {
    // 创建主面板
    JPanel panel = new JPanel();
    panel.setLayout(new GridLayout(5, 1, 10, 10)); // 设置网格布局

    // 创建标题标签
    JLabel label = new JLabel("请选择或输入要访问的网站：", JLabel.CENTER);
    panel.add(label);

    // 添加导航按钮
    JButton googleButton = new JButton("访问 Google");
    JButton baiduButton = new JButton("访问 百度");
    JButton githubButton = new JButton("访问 GitHub");
    panel.add(googleButton);
    panel.add(baiduButton);
    panel.add(githubButton);

    // 添加输入框和访问按钮
    JPanel inputPanel = new JPanel(new BorderLayout());
    JTextField urlField = new JTextField();
    JButton visitButton = new JButton("访问自定义网址");
    inputPanel.add(urlField, BorderLayout.CENTER);
    inputPanel.add(visitButton, BorderLayout.EAST);
    panel.add(inputPanel);

    // 将主面板添加到窗口
    frame.add(panel);

    // 添加按钮的点击事件
    addListeners(googleButton, baiduButton, githubButton, urlField, visitButton);
}

private static void addListeners(JButton googleButton, JButton baiduButton, 
                                JButton githubButton, JTextField urlField, JButton visitButton) {
    googleButton.addActionListener(e -> openWebsite("https://www.google.com"));
    baiduButton.addActionListener(e -> openWebsite("https://www.baidu.com"));
    githubButton.addActionListener(e -> openWebsite("https://www.github.com"));

    visitButton.addActionListener(e -> {
        String url = urlField.getText();
        if (!url.isEmpty()) {
            if (!url.startsWith("http://") && !url.startsWith("https://")) {
                url = "https://" + url;
            }
            openWebsite(url);
        } else {
            JOptionPane.showMessageDialog(null, "请输入一个有效的网址！");
        }
    });
}

private static void openWebsite(String url) {
    try {
        Desktop desktop = Desktop.getDesktop();
        desktop.browse(new URI(url));
    } catch (Exception e) {
        JOptionPane.showMessageDialog(null, "无法打开网址：" + e.getMessage());
    }
}

googleButton.setBackground(Color.BLUE);
googleButton.setForeground(Color.WHITE);
googleButton.setFont(new Font("Arial", Font.BOLD, 14));