Our product/s are embedded system.
Till now i work at JSystem with products with RS232 ports and no problem (by using javax.comm./comm.jar)
One of the new products has USB connection (VCP), I am trying recognize when this USB device plugged in/unplugged (I added jsr80-1.0.1.jar to my referenced libraries in eclipse )
I copy the jsr80-1.0.1.jar to mine project lib folder and also at C:\jsystem\runner\lib
The problem i get "java.lang.NullPointerException" when execute line UsbServices services = UsbHostManager.getUsbServices();
Does anyone encounter such problem?
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Now i have a new problem .....
(The previous problem solved i download all relevant files from http://usb4java.org/index.html#).
The problem now is when i run a BB thru JSystem there is the following exception: [jsystem] javax.usb.UsbException: Properties file javax.usb.properties not found. [jsystem] at javax.usb.UsbHostManager.setupProperties(Unknown Source) [jsystem] at javax.usb.UsbHostManager.getProperties(Unknown Source) [jsystem] at javax.usb.UsbHostManager.createUsbServices(Unknown Source) [jsystem] at javax.usb.UsbHostManager.getUsbServices(Unknown Source)
When i run from eclipse as JUnit test there is no such problem
The file javax.usb.properties put it at:
lib folder
classes folder
tests folder
Why when i run JSystem can not find file javax.usb.properties?
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After spending few hours among other things reading forums....
Already out of desperation i copy this files in several folders (and still there is problem):
runner\lib
runner\thirdparty\commonLib
runner\thirdparty\lib
Program Files\Java\jdk1.6.0_45\lib
Program Files\Java\jdk1.6.0_45\jre\lib
Program Files\Java\jdk1.6.0_45\jre\lib\ext
Any other suggestions?
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I back to this problem and looks like i found solution...
When i run from eclipse the file "javax.usb.properties" is read from <mineProjectPath>\classes When i run from JSystem the file "javax.usb.properties" is read from <JDK_folder>\jre\classes
To tell the truth i dont understand this solution, why i needed to create folder classes and put this property file in to it?
Any advices? better solution?
Another issue - that maybe related to mine problem - i found at runner folder file ".ant.properties" one of it property is: sun.boot.class.path=C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\resources.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\rt.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\sunrsasign.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\jsse.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\jce.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\charsets.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\modules\\jdk.boot.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\classes
Looks like each time that i run from JSystem this file is created but who set this path "C\:\Program Files\Java\jdk1.6.0_45\jre\classes"?
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Our product/s are embedded system.
Till now i work at JSystem with products with RS232 ports and no problem (by using javax.comm./comm.jar)
One of the new products has USB connection (VCP), I am trying recognize when this USB device plugged in/unplugged (I added jsr80-1.0.1.jar to my referenced libraries in eclipse )
I copy the jsr80-1.0.1.jar to mine project lib folder and also at C:\jsystem\runner\lib
The problem i get "java.lang.NullPointerException" when execute line UsbServices services = UsbHostManager.getUsbServices();
Does anyone encounter such problem?
Now i have a new problem .....
(The previous problem solved i download all relevant files from http://usb4java.org/index.html#).
The problem now is when i run a BB thru JSystem there is the following exception:
[jsystem] javax.usb.UsbException: Properties file javax.usb.properties not found.
[jsystem] at javax.usb.UsbHostManager.setupProperties(Unknown Source)
[jsystem] at javax.usb.UsbHostManager.getProperties(Unknown Source)
[jsystem] at javax.usb.UsbHostManager.createUsbServices(Unknown Source)
[jsystem] at javax.usb.UsbHostManager.getUsbServices(Unknown Source)
When i run from eclipse as JUnit test there is no such problem
The file javax.usb.properties put it at:
lib folder
classes folder
tests folder
Why when i run JSystem can not find file javax.usb.properties?
Try to copy the jar under /runner/lib
Thanks Alex for your response,
After spending few hours among other things reading forums....
Already out of desperation i copy this files in several folders (and still there is problem):
runner\lib
runner\thirdparty\commonLib
runner\thirdparty\lib
Program Files\Java\jdk1.6.0_45\lib
Program Files\Java\jdk1.6.0_45\jre\lib
Program Files\Java\jdk1.6.0_45\jre\lib\ext
Any other suggestions?
I back to this problem and looks like i found solution...
When i run from eclipse the file "javax.usb.properties" is read from <mineProjectPath>\classes
When i run from JSystem the file "javax.usb.properties" is read from <JDK_folder>\jre\classes
To tell the truth i dont understand this solution, why i needed to create folder classes and put this property file in to it?
Any advices? better solution?
Another issue - that maybe related to mine problem - i found at runner folder file ".ant.properties" one of it property is:
sun.boot.class.path=C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\resources.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\rt.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\sunrsasign.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\jsse.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\jce.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\charsets.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\lib\\modules\\jdk.boot.jar;C\:\\Program Files\\Java\\jdk1.6.0_45\\jre\\classesLooks like each time that i run from JSystem this file is created but who set this path "C\:\Program Files\Java\jdk1.6.0_45\jre\classes"?