Javax.usb problem

Question

i would like to use window xp to test this program
import javax.usb.*;
import java.util.List;
public class TraverseUSB
public static void main(String argv[])
try
// Access the system USB services, and access to the root
// hub. Then traverse through the root hub.
UsbServices services = UsbHostManager.getUsbServices();
UsbHub rootHub = services.getRootUsbHub();
traverse(rootHub);
} catch (Exception e) {}
public static void traverse(UsbDevice device)
if (device.isUsbHub())
// This is a USB Hub, traverse through the hub.
List attachedDevices = ((UsbHub) device).getAttachedUsbDevices();
for (int i=0; i<attachedDevices.size(); i++)
traverse((UsbDevice) attachedDevices.get(i));
else
// This is a USB function, not a hub.
// Do something.
error message
C:\TraverseUSB.java:1: package javax.usb does not exist
import javax.usb.*;
^
C:\TraverseUSB.java:18: cannot resolve symbol
symbol : class UsbDevice
location: class TraverseUSB
public static void traverse(UsbDevice device)
^
C:\TraverseUSB.java:12: cannot resolve symbol
symbol : class UsbServices
location: class TraverseUSB
UsbServices services = UsbHostManager.getUsbServices();
^
C:\TraverseUSB.java:12: cannot resolve symbol
symbol : variable UsbHostManager
location: class TraverseUSB
UsbServices services = UsbHostManager.getUsbServices();
^
C:\TraverseUSB.java:13: cannot resolve symbol
symbol : class UsbHub
location: class TraverseUSB
UsbHub rootHub = services.getRootUsbHub();
^
C:\TraverseUSB.java:23: cannot resolve symbol
symbol : class UsbHub
location: class TraverseUSB
List attachedDevices = ((UsbHub) device).getAttachedUsbDevices();
^
C:\TraverseUSB.java:26: cannot resolve symbol
symbol : class UsbDevice
location: class TraverseUSB
traverse((UsbDevice) attachedDevices.get(i));
^
7 errors
Tool completed with exit code 1
also i would like to ask when i run this program, what package do it use. and how can i run this program.

Answer 1

Hi, i've tried this code as well.. i manage to solve your error, but i cant get it to run properly.
meaning, the program cant read the device at all. i also had teh same code as you, i got it from somewhere, but it don't seem to work.. can anyone help me?
System.out.println("hello");
UsbServices services = UsbHostManager.getUsbServices();
System.out.println("hello1");
UsbHub rootHub = services.getRootUsbHub();
System.out.println("hello2");
traverse(rootHub);
System.out.println("hello3");
the output is only hello.
so i don't know what is wrong.. anyone any idea?
download link: [http://sourceforge.net/project/showfiles.php?group_id=21114]