Javax.usb api

Hi there, I am used to programming in java since some months but only with simple things. I need to communicate with a usb via my GUI. I found this websites for javax.usb, and also found the some tar files and zip files. http://sf.gds.tuwien.ac.at/j/ja/javax-usb/
Can somebody explain me how to implement this files and where will the files be stored in the system? I will greatlly appreciate if somebody can show me how the topology works and how many files i need to just get the data from usb into m system gui. I am looking for a common platform code if any out there.
thanks for the help...

Hi there, I am used to programming in java since some
months but only with simple things. I need to
communicate with a usb via my GUI. I found this
websites for javax.usb, and also found the some tar
files and zip files.
http://sf.gds.tuwien.ac.at/j/ja/javax-usb/
Can somebody explain me how to implement this files
and where will the files be stored in the system? I
will greatlly appreciate if somebody can show me how
the topology works and how many files i need to just
get the data from usb into m system gui. I am looking
for a common platform code if any out there.
thanks for the help...

Similar Messages

Error Installing javax.usb

Hello
I know that Javax.usb was not created by sun but I'm looking for a solution and it's my last chance.
I'm trying to install Javax.usb, the installation goes well for the API and the Common RI. Things are going wrong with the Linux RI.
I Have this message at compilation :
[moi@eeePC javax-usb-ri-linux]$ ant compile
Buildfile: build.xml
compile:
     [echo] Compiling class files.
     [echo] Compiling JNI library.
BUILD FAILED
/home/moi/Bureau/javax-usb/javax-usb-ri-linux/build.xml:114: Problem: failed to create taskor type javah
Cause: the class org.apache.tools.ant.taskdefs.optional.Javah was not found.
        This looks like one of Ant's optional components.
Action: Check that the appropriate optional JAR exists in
        -/usr/share/ant/lib
        -/home/moi/.ant/lib
        -a directory added on the command line with the -lib argument
Do not panic, this is a common problem.
The commonest cause is a missing JAR.
This is not a bug; it is a configuration problem
Total time: 1 secondI understand That this is an ANT configuration problem but after much googling I found the class that lacks with a complete Jar file.
I copied the Jar File and its uncompressed version every on the system
in /usr/share/ant/lib,/home/moi/.ant/lib and also in many directories. According to the error, it should have been enough but it is not.
Can someone help me please ?
System Information :
ANT : Apache Ant version 1.7.1 compiled on August 2 2008
Linux : Linux eeePC 2.6.27-desktop-0.rc8.2mnb #1 SMP Thu Oct 2 06:11:56 EDT 2008 i686 Intel(R) Atom(TM) CPU N270 @ 1.60GHz GNU/Linux

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Is there any 'standard' implementation of JSR80 for 64 bit Linux. Is the code at javax-usb.org widely used, and does it work in this environment. Is there now anything in the core API.
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I just did a quick google for "java usb" and it looks like there are a lot of APIs and tutorials. Here is one that looks promising, and it looks like it works on Windows: jUSB.
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Properties File: javax.usb ?

Hi Guys,
I'm sure you've all heard this a million times, but I'm hung up on it. I'm trying to learn about javax.usb, and keep getting this exception:javax.usb.UsbException: Properties file javax.usb.properties not found.And I swear to God guys, it's there (i know i'm wrong though).
This is what I've added to my buildpath:
-javax-usb_1.0.1.zip
-javax-usb-ri_1.0.1.zip
-jsr80-1.0.1.jar
-jsr80_ri-1.0.1.jar
-javax-usb-tck_1.0.1.zip
Take a look for yourself: http://img.photobucket.com/albums/v335/shlumph/referencedLibraries.jpg
How come the compiler can't see that the javax.usb.properties file is there? What is the best way to fix this?
If it helps, here is my source code:
import java.io.UnsupportedEncodingException;
import java.util.*;
import javax.usb.*;
public class USBListener {
     public static void main(String[] args) {
          try{
               UsbServices services = UsbHostManager.getUsbServices();
               UsbHub root = services.getRootUsbHub();
               listDevices(root);
          } catch (Exception e) {
               System.out.println(e);
     public static void listDevices(UsbHub hub) throws UnsupportedEncodingException, UsbException {
          List devices = hub.getAttachedUsbDevices();
          Iterator iterator = devices.iterator();
          while(iterator.hasNext()) {
               UsbDevice device = (UsbDevice)iterator.next();
               describe(device);
               if(device.isUsbHub()) {
                    System.out.println("is hub");
     public static void describe(UsbDevice device)
          throws UnsupportedEncodingException, UsbException {
          UsbDeviceDescriptor descriptor = device.getUsbDeviceDescriptor();
          byte manufacturerCode = descriptor.iManufacturer();
          System.out.println("Manufacturer index: " + manufacturerCode);
          System.out.println("Manufacturer String: " + device.getString(manufacturerCode));
          System.out.println("USB version: " + decodeBCD(descriptor.bcdUSB()));
          System.out.println("Maximum control packet size: " + descriptor.bMaxPacketSize0());
     public static String decodeBCD(short bcd) {
          int upper = (0xFF00 & bcd) >> 8;
          int middle = (0xF0 & bcd) >> 4;
          int lower = 0x0F & bcd;
          return upper + "." + middle + "." + lower;
}

Hi,
Probably you did not set properly your classpath. Read the following FAQ:
http://javax-usb.org/faq.html#get_properties_file
http://javax-usb.org/faq.html#what_is_properties_file
http://javax-usb.org/faq.html#linux_imp_jar_file
http://javax-usb.org/faq.html#still_doesnt_work
Note that for Windows: "This is a pre-alpha Windows implementation (it does not work, it needs a kernel driver)."
http://javax-usb.cvs.sourceforge.net/javax-usb/javax-usb-ri-windows/README?view=markup
Mimo

Javax.usb

Hello
I'm planning to write an application to connect to a development board via USB connection.
After google-ing i ended up trying to install javax-usb.
Downloaded the 3 packages:
     javax-usb_1.0.2
javax-usb-ri_1.0.2
     javax-usb-ri-linux_1.0.2
javax-usb builds ok. I add the path to "/lib/jsr80.jar" to my CLASSPATH.
when I try to build the second one, javax-usb-ri_1.0.2, I get lots of errors:
clean:
[echo] Cleaning everything.
compile:
[echo] Compiling class files.
[javac] Compiling 50 source files to /home/iggy/Documents/javax-usb-ri/src
[javac] /home/iggy/Documents/javax-usb-ri/src/com/ibm/jusb/DefaultUsbInterfacePolicy.java:12: package javax.usb does not exist
[javac] import javax.usb.*;
[javac] ^
[javac] /home/iggy/Documents/javax-usb-ri/src/com/ibm/jusb/DefaultUsbInterfacePolicy.java:18: cannot find symbol
[javac] symbol: class UsbInterfacePolicy
[javac] public class DefaultUsbInterfacePolicy implements UsbInterfacePolicy
[javac] ^
[javac] /home/iggy/Documents/javax-usb-ri/src/com/ibm/jusb/DefaultUsbInterfacePolicy.java:37: cannot find symbol
[javac] symbol : class UsbInterface
[javac] location: class com.ibm.jusb.DefaultUsbInterfacePolicy
[javac]      public boolean forceClaim(UsbInterface usbInterface) { return false; }
[javac]      ^
[javac] /home/iggy/Documents/javax-usb-ri/src/com/ibm/jusb/UsbConfigurationDescriptorImp.java:12: package javax.usb does not exist
[javac] import javax.usb.UsbConfigurationDescriptor;
[javac] ^
[javac] /home/iggy/Documents/javax-usb-ri/src/com/ibm/jusb/UsbConfigurationDescriptorImp.java:13: package javax.usb.util does not exist
[javac] import javax.usb.util.UsbUtil;
[javac] ^
etc..
I guess it doesn't seem to find the javax.usb library.Or...???
the third does't build either...naturally.
So what am I doing wrong?I'm using Ubuntu 8.10.
Is there any other way to make buld I/O over USB (besides using JNI)?

for jUSB on windows you should read the manual that came with it to enable the specific device as a JUSB device ( the appendixes i think ), it involves going into your device manager i think ( the instructions should say and be simple enough ), i don't like it because it defeats the purpose of being able to plug the device into any usb port and doing a search for it from there and then being able to communicate with it, it also prevents the original app. from communicating with it successfully through the port you configured the device for
by the way the device i used the java usb packages for is the vernier go temp. sensor =) (developing a program to display and record data from it while using it in my chemistry labs which would beat the hell out of standing, stirring, and measuring temp. with an alcohol thermometer to the second decimal place every 15 seconds for about 30 minutes for about 6 rounds with an avg. temp. rate change of about 1 deg. per 80 secs. =( )
Edited by: scphan on Mar 19, 2009 3:40 PM

Linux, Java and Javax.usb

Hello,
I've spent 3 days trying to install the javax.usb package on my linux with the classical package and I finally found the javax.usb RPMs. I installed them and every thing seemed fine until I tried to run a java program.
Now I'm unable to run any program.
Completion does not work anymore e.g. when I'm in a directory with a .class file, the completion is unable to find it.
That would not be a real problem but when I try to run a java program, I always end up with a ClassNotFoundException. Does anyone have a clue about what is happening to me.
System : Mandriva 2009.0
Linux Kernel 2.6

Packages that begin with "java" are base packages.
Packages that begin with "javax" are extensions to
Java (hence the "x").
AWT was the first UI package in Java. Swing came
later and was added as an extension.
%aha, right. cheers

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Hi,
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I am looking for one too.. i figured better would be to use JNI classes... but i havent yet implemented it.. mebbe that will cause even more problemos..
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Using javax.usb to read usb using java

hai friends
iam trying to read data from usb and i had tried over javax,usb package it asks for the implemntation og javax.usb.UsbServices interface. wt is the solution
with regards hbk

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Javax usb exception

Hi All - I'm kinda new at this and looking for some help. I successfully compiled the program below to enumerate the USB bus, but when I run the program I get the errors (listed at the end). Where did I go wrong? Any help would much appreciated. Thank you
~~~~~~~~~~~~~
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.
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~~~~~~~~~~~~~~
# java TraverseUSB
Exception in thread "main" java.lang.NoClassDefFoundError: javax/usb/UsbDevice
Caused by: java.lang.ClassNotFoundException: javax.usb.UsbDevice
at java.net.URLClassLoader$1.run(URLClassLoader.java:217)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:205)
at java.lang.ClassLoader.loadClass(ClassLoader.java:319)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:294)
at java.lang.ClassLoader.loadClass(ClassLoader.java:264)
at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:332)
Could not find the main class: TraverseUSB. Program will exit.
#

You've probably forgotten to set the classpath.

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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)
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for (int i=0; i<attachedDevices.size(); i++)
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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.

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]

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