Aim : List the usb devicse via java progran at Linux. Below is the information I got : 1. The book I studied is "O' Reilly Java I/O 2nd edition" and the chapter23.
2. Meanwhile I also surfed and read the "JRS-80" (http://javax-usb.org) Below is the configuration I set : a. Put the *jsr80-1.0.0.jar*、*jsr80_linux-1.0.1.jar*、*jsr80_ri-1.0.0.jar*into the directory "/ *jdk/jre/lib/ext*/" b. Rename the *libJavaxUsb-1.0.0.so* to* libJavaxUsb.so*. And place it to the directory *"/jdk/jre/lib/i386*/" c. Place* javax-usb.properties* to the "*/jdk/jre/lib/*" d. I have used the different Linux platform (OpenSuSe and 10, RedHat EnterPrise 5, Debian, Fedora...etc) e. I also tried the different version about JDK (jdk-6-linux-i586.bin, Java5, J2SDK) Below is the code I tried : import java.util.*; import javax.usb.*; public class USBLister{ public static void main(String args[]) throws UsbException{ UsbServices services = UsbHostManager.getUsbServices(); UsbHub root = services.getRootUsbHub(); listDevices(root); } public static void listDevices(UsbHub hub){ List devices = hub.getAttachedUsbDevices(); Iterator iterator = devices.iterator(); while(iterator.hasNext()){ UsbDevice device = (UsbDevice)iterator.next(); System.out.println(device); if(device.isUsbHub()){ listDevices((UsbHub)device); } } } } ==> Everything is okay about the compile (javac). ==> But when I ran (java) it, some exception occured. Exception : com.ibm.jusb.os.linux.JavaxUsb.nativeSetTraceOutput ==> I am confused in this initiation between JAVA and USB for a long while. Could someone give me any advices to the connection about the USB at the Linux? Whatever Thanks your reading ^^
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