Hello

I am new in java usb communication .I am using jdk1.6.0 ane NetBeans IDE 6.8 on Windows7.

I attached javax.usb package and following jar fils to NetBeens.

1)jsr80.jar
2)jsr80_ri.jar
3)jsr80_windows .jar
4)log4j.jar
5)commons-logging.jar

I compile and run a sample program ShowToplogy.jav a. and got following error--


log4j:WARN No appenders...