Problem while using reading USB Port : using JSR80

Question

i want to read the data comming from a usb keyboard.
So i looked for the api's in java and could find jUSB and JSR80.
when i tried using jUSB, i could detect the device connected to the usb port
but for that i had to do many things, whih included editing the registry to make a generic JSUB driver. so this implementation is not acceptable to my current requirement which is a web application..and the java program to detect the usb device come in an applet. so we cannot go to each client machines accessing the page and configure the driver and make regisrty edits.
So i moved to JSR80..which was telling abt a complete implementation in Linux.
but what i want is for windows. JSR80 also have an uncertified windows support. so i tried usig it.
i downloaded the following files
http://javax-usb.cvs.sourceforge.net/javax-usb/javax-usb-libusb/lib/jsr80_windows.jar?view=log
javax.usb.properties
jsr80.jar
jsr80_ri.jar
jsr80_windows.jar
downloaded libusb-win32-filter-bin-0.1.10.1.exe from
http://libusb-win32.sourceforge.net/
and created an eclipse project added the jars using the javabuildpath menu.
copied the location of javax.usb.properties in classpath system variable.
insatlled the exe for libusb.
now i wrote the following code.
it didn't show any compile error so i assumed what i did with the jars are correct.
import java.util.Properties;
import javax.usb.UsbException;
import javax.usb.UsbHostManager;
import javax.usb.UsbHub;
import javax.usb.UsbServices;
public class SampleUSBTest {
      * @param args
     public static void main(String[] args) {
          // TODO Auto-generated method stub
          SampleUSBTest obj=new SampleUSBTest();
     public SampleUSBTest()
          UsbServices services;
          try {
               services = UsbHostManager.getUsbServices();
               UsbHub vroothub = services.getRootUsbHub();
               String s=vroothub.toString();
               System.out.println(s);
          } catch (SecurityException e) {
               e.printStackTrace();
          } catch (UsbException e) {
               e.printStackTrace();
}But when i ran the code it showed the following runtime error.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
     at com.mcreations.usb.windows.JavaxUsb.<clinit>(JavaxUsb.java:65)
     at com.mcreations.usb.windows.WindowsUsbServices.<init>(WindowsUsbServices.java:46)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
     at java.lang.reflect.Constructor.newInstance(Unknown Source)
     at java.lang.Class.newInstance0(Unknown Source)
     at java.lang.Class.newInstance(Unknown Source)
     at javax.usb.UsbHostManager.createUsbServices(Unknown Source)
     at javax.usb.UsbHostManager.getUsbServices(Unknown Source)
     at SampleUSBTest.<init>(SampleUSBTest.java:23)
     at SampleUSBTest.main(SampleUSBTest.java:16)can anyone please give suggestions on this.
sample code with steps to configure and the links for reference will be really appreciated.
thank u

Answer 1

I am also facing the same problem with the code and getting errors while running my application in Eclipse is this some version problem or any other isues are afftecting my application to run successfully.
I get following errors while running my application inspite of having all the jars and libusb for windows:
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
     at com.mcreations.usb.windows.JavaxUsb.<clinit>(JavaxUsb.java:65)
     at com.mcreations.usb.windows.WindowsUsbServices.<init>(WindowsUsbServices.java:46)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
     at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
     at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
     at java.lang.reflect.Constructor.newInstance(Constructor.java:494)
     at java.lang.Class.newInstance0(Class.java:350)
     at java.lang.Class.newInstance(Class.java:303)
     at javax.usb.UsbHostManager.createUsbServices(Unknown Source)
     at javax.usb.UsbHostManager.getUsbServices(Unknown Source)
     at org.symphony.embedded.ShowTopology.getVirtualRootUsbHub(ShowTopology.java:56)
     at org.symphony.embedded.FindUsbDevice.main(FindUsbDevice.java:29)