When you embed BrowserView component into Java Swing frame with menu bar, by default you can see that browser component overlays pop-up menu as shown on the following screenshot:
(当您通过菜单栏将BrowserView组件嵌入Java Swing框架时,默认情况下,您会看到弹出菜单被浏览器组件遮挡,如下图所示:)

The reason of this issue is in mixing lightweight pop-up menu and heavyweight Browser component (by default Browser component is always heavyweight). To fix this issue you need to disable lightweight implementation of pop-ups using the following command: (此问题的原因是混合了轻量级弹出菜单和重量级浏览器组件(默认情况下,浏览器组件始终是重量级的)。要解决此问题,您需要使用以下命令来禁用轻量级弹出窗口的实现:)
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
This code forces all Swing pop-up menus to be heavyweight. As result you don't see the issue:
(此代码强制所有Swing弹出菜单都是重量级的。不会出现该问题:)

Source code of the example: (示例的源代码:)
import com.teamdev.jxbrowser.chromium.Browser;
import com.teamdev.jxbrowser.chromium.swing.BrowserView;
import javax.swing.*;
import java.awt.*;
public class BrowserSample {
public static void main(String[] args) {
JPopupMenu.setDefaultLightWeightPopupEnabled(false);
Browser browser = new Browser();
BrowserView view = new BrowserView(browser);
JMenu fileMenu = new JMenu("File");
fileMenu.add(new JMenuItem("Open..."));
fileMenu.add(new JMenuItem("Close"));
JMenuBar menuBar = new JMenuBar();
menuBar.add(fileMenu);
JFrame frame = new JFrame();
frame.setJMenuBar(menuBar);
frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
frame.add(new JTextField("http://www.google.com"), BorderLayout.NORTH);
frame.add(view, BorderLayout.CENTER);
frame.setSize(425, 290);
frame.setLocationRelativeTo(null);
frame.setVisible(true);
browser.loadURL("http://google.com");
}
}