DiscoverUSBHub.java

package eduonix.nativeapp;

import javax.usb.*;
import java.util.List;

/**
 * This is the test to access your usb port
 */
public class DiscoverUSBHub {


    /**
     * Dumps the specified USB device to stdout.
     *
     * @param device
     *            The USB device to dump.
     */
    private static void dumpDevice(final UsbDevice device)
    {
        // Dump information about the device itself
        System.out.println(device);
        final UsbPort port = device.getParentUsbPort();
        if (port != null)
        {
            System.out.println("Connected to port: " + port.getPortNumber());
            System.out.println("Parent: " + port.getUsbHub());
        }

        // Dump device descriptor
        System.out.println(device.getUsbDeviceDescriptor());

        // Process all configurations
        for (UsbConfiguration configuration: (List<UsbConfiguration>) device
                .getUsbConfigurations())
        {
            // Dump configuration descriptor
            System.out.println(configuration.getUsbConfigurationDescriptor());

            // Process all interfaces
            for (UsbInterface iface: (List<UsbInterface>) configuration
                    .getUsbInterfaces())
            {
                // Dump the interface descriptor
                System.out.println(iface.getUsbInterfaceDescriptor());

                // Process all endpoints
                for (UsbEndpoint endpoint: (List<UsbEndpoint>) iface
                        .getUsbEndpoints())
                {
                    // Dump the endpoint descriptor
                    System.out.println(endpoint.getUsbEndpointDescriptor());
                }
            }
        }

        System.out.println();

        // Dump child devices if device is a hub
        if (device.isUsbHub())
        {
            final UsbHub hub = (UsbHub) device;
            for (UsbDevice child: (List<UsbDevice>) hub.getAttachedUsbDevices())
            {
                dumpDevice(child);
            }
        }
    }

    /**
     * Main method.
     *
     * @param args
     *            Command-line arguments (Ignored)
     * @throws UsbException
     *             When an USB error was reported which wasn't handled by this
     *             program itself.
     */
    public static void main(final String[] args) throws UsbException
    {
        // Get the USB services and dump information about them
        final UsbServices services = UsbHostManager.getUsbServices();
        System.out.println("USB Service Implementation: "
                + services.getImpDescription());
        System.out.println("Implementation version: "
                + services.getImpVersion());
        System.out.println("Service API version: " + services.getApiVersion());
        System.out.println();

        // Dump the root USB hub
        dumpDevice(services.getRootUsbHub());
    }



}