无法在Java

Question

我是Java的初学者，我试图将一台笔记本电脑显示到Java应用程序中，为此，我使用输入E-260U电视调谐器< / strong>卡，但未使用以下设备检测到此设备：Vector info = CaptureDeviceManager.getDeviceList(null);。

这是我的代码：

Vector info = CaptureDeviceManager.getDeviceList(null);
if (info == null)
  System.out.println("No Capture devices known to JMF");
else {
  System.out.println("The following " + info.size()
      + " capture devices are known to the JMF");
  for (int i = 0; i < info.size(); i++)
    System.out
        .println("\t" + (CaptureDeviceInfo) info.elementAt(i));

提前谢谢！