EXCEPTION_ACCESS_VIOLATION OpenJDK 11 and Windows 10

[Matt Dunning]

Hello,

I have been working in Java for several years but have never had a need to directly access a USB device.  I am starting a side project working with Bluetooth USB dongles.  The goal is to scan for a USB Bluetooth dongles and make them behave like a headphone/speaker or heart rate monitor.  I am told that this part is possible.  

My research for a USB api in Java lead me to usb4java.  I am using an Eclipse environment and OpenJDK 11 on Windows 10.  After reading the documentation I am able to get access to the usb4java classes and I got the .dll file included in the class path.  To familiarize my self with the code I copied a couple different examples from the site.  The issue I run into is a EXCEPTION_ACCESS_VIOLATION, see the attached hs_er_pid file.  From what I can tell it is not an issue with my configuration in Eclipse.  I have spent most of the day trying to figure out how to resolve this issue without any luck.  Any help would be greatly appreciated. 

See code example below:

import org.usb4java.Context;

import org.usb4java.Device;

import org.usb4java.DeviceDescriptor;

import org.usb4java.DeviceList;

import org.usb4java.LibUsb;

import org.usb4java.LibUsbException;

public class Main {

static {

System.load("C:/Eclipse_Workspace/BlueToothSimulator/lib/native/org/usb4java/win32-x86-64/libusb4java.dll");

}

public static void main(String[] args) {

// Create the libusb context

Context context = new Context();

// Initialize the libusb context

int result = LibUsb.init(context);

if (result < 0) {

throw new LibUsbException("Unable to initialize libusb", result);

}

// Read the USB device list

DeviceList list = new DeviceList();

result = LibUsb.getDeviceList(context, list);

if (result < 0) {

throw new LibUsbException("Unable to get deice list", result);

}

try {

// Iterate over all devices and list them

for (Device device : list) {

int address = LibUsb.getDeviceAddress(device);

int bussNumber = LibUsb.getBusNumber(device);

DeviceDescriptor deviceDescriptor = new DeviceDescriptor();

result = LibUsb.getDeviceDescriptor(device, deviceDescriptor);

if (result < 0) {

throw new LibUsbException("Unbale to read device descriptor", result);

}

System.out.format("Bus %03d, Device %03d, Vendor %04x, Product %04x%n", 

   bussNumber, 

   address,

   deviceDescriptor.idVendor(),

   deviceDescriptor.idProduct());

}

} finally {

LibUsb.freeDeviceList(list, true);

}

LibUsb.exit(context);

}

}