在Raspberry Pi上的Bluecove Java中不显示配对的设备

Question

我想在我的 Raspberry Pi 中看到配对的蓝牙设备。我将 Bluecove 库与 Java 结合使用，有代码：

public class bluetooth  {
    public static final Vector/*<RemoteDevice>*/ devicesDiscovered = new Vector();

    public static void main(String[] args) throws BluetoothStateException, InterruptedException {
        String result= showDevices();
        System.out.println(result);         
    }
     public static String showDevices() throws BluetoothStateException, InterruptedException {
     final Object inquiryCompletedEvent = new Object();
     String message = null;    
      devicesDiscovered.clear();
      DiscoveryListener listener = new DiscoveryListener() {

           public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
               System.out.println("Device " + btDevice.getBluetoothAddress() + " found");
               devicesDiscovered.addElement(btDevice);
               try {
                   System.out.println("     name " + btDevice.getFriendlyName(false));
               } catch (IOException cantGetDeviceName) {
               }
           }

           public void inquiryCompleted(int discType) {
               System.out.println("Device Inquiry completed!");
               synchronized(inquiryCompletedEvent){
                   inquiryCompletedEvent.notifyAll();
               }
           }

           public void serviceSearchCompleted(int transID, int respCode) {
           }

           public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
           }


       };

       synchronized(inquiryCompletedEvent) {
           boolean started = LocalDevice.getLocalDevice().getDiscoveryAgent().startInquiry(DiscoveryAgent.GIAC, listener);
           if (started) {
               System.out.println("wait for device inquiry to complete...");
               inquiryCompletedEvent.wait();

               message = devicesDiscovered.size() +  " device(s) found";
               System.out.println(devicesDiscovered.size() +  " device(s) found");
           }
       }
        return message; 
}
}

没有更多已配对的设备：

BlueCove version 2.1.1-SNAPSHOT on bluez 
wait for device inquiry to complete... 
Device Inquiry completed! 
0 device(s) found 
0 device(s) found 
BlueCove stack shutdown completed

但是我已经配对了三台设备。我对此很确定。互联网上也没有其他类似的例外。如果解决了这个问题，它可能是一个很好的来源。

注意：：该代码可在Windows上成功运行。

重要说明：此问题已解决！ 解决方案： 而不是：java -jar try.jar 这应该使用：sudo java -jar try.jar

我写信是为了使那些从事这项工作的人容易上手。