java - How to use usb4java to read two scanners at the same time? -

i have 2 barcode scanners , need read data scanner. how can know data comes scanner? know scanners auto config keyboard , using windows 8.

how can know data comes scanner?

i using following method:

public static string getbusanddevice(final usbdevice usbdevice) {     // hack: need "deviceid ((abstractdevice) usbdevice).getid()" it's not accessible!     // usbdevice.tostring() gives information, shouldn't rely on     // string returned method!     final string tostring = usbdevice.tostring();     final matcher matcher = pattern_busanddevice.matcher(tostring);     if (!matcher.matches()) {         throw new illegalstateexception("can't retrieve 'bus %03d device %03d'");     }     final string busanddevice = matcher.group(1);     return busanddevice; } static final pattern pattern_busanddevice = pattern.compile( //   "^(bus ([0-9]{3}) device ([0-9]{3})): .*");