使用 WebBrowsersuper(new BorderLayout());
final JPanel webBrowserPanel = new JPanel(new BorderLayout());
webBrowser.setBarsVisible(false);
webBrowser.navigate(url);
webBrowserPanel.add(webBrowser, BorderLayout.CENTER);
add(webBrowserPanel, BorderLayout.CENTER);
JPanel panel = new JPanel(new FlowLayout(FlowLayout.CENTER, 4, 4));
System.out.println("======" + Thread.currentThread().getId());
webBrowser.addWebBrowserListener(new WebBrowserAdapter() {
