> 原來只能修改一次，我以為在networkdelegate里可以隨便修改 在創建任何瀏覽器實例之前，只能修改一次用戶代理字符串。您可以使用BrowserPreferences.setUserAgent（String userAgent）方法或通過jxbrowser.chromium.user-agent Java System屬性提供您自己的用戶代理字符串： ``` BrowserPreferences.setUserAgent("My User Agent String"); ``` ``` import com.teamdev.jxbrowser.chromium.Browser; import com.teamdev.jxbrowser.chromium.BrowserPreferences; import com.teamdev.jxbrowser.chromium.swing.BrowserView; import javax.swing.*; import java.awt.*; /** * The sample demonstrates how to configure user-agent string * for all Browser instances. */ public class UserAgentSample { public static void main(String[] args) { // It's very important to configure user-agent string // before any Browser instance is created. BrowserPreferences.setUserAgent("My User Agent String"); Browser browser = new Browser(); BrowserView browserView = new BrowserView(browser); JFrame frame = new JFrame(); frame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); frame.add(browserView, BorderLayout.CENTER); frame.setSize(700, 500); frame.setLocationRelativeTo(null); frame.setVisible(true); browser.loadURL("http://whatsmyuseragent.com/"); } } ```