question: public static String dump ( final EndpointDescriptor descriptor ) { return String . format ( "Endpoint Descriptor:%n" + "  bLength %18d%n" + "  bDescriptorType %10d%n" + "  bEndpointAddress %9s  EP %d %s%n" + "  bmAttributes %13d%n" + "    Transfer Type             %s%n" + "    Synch Type                %s%n" + "    Usage Type                %s%n" + "  wMaxPacketSize %11d%n" + "  bInterval %16d%n" , descriptor . bLength ( ) , descriptor . bDescriptorType ( ) , String . format ( "0x%02x" , descriptor . bEndpointAddress ( ) & 0xff ) , descriptor . bEndpointAddress ( ) & 0x0f , getDirectionName ( descriptor . bEndpointAddress ( ) ) , descriptor . bmAttributes ( ) & 0xff , getTransferTypeName ( descriptor . bmAttributes ( ) ) , getSynchTypeName ( descriptor . bmAttributes ( ) ) , getUsageTypeName ( descriptor . bmAttributes ( ) ) , descriptor . wMaxPacketSize ( ) & 0xffff , descriptor . bInterval ( ) & 0xff ) ; }
target:  Dumps the specified USB endpoint descriptor into a string and returns it.