JNI (Java Native Interface) errors

When running javah -jni {name of class}

I'm getting the following errors:
Could not find class file for {name of class}


When I run the same command in another directory that contains my source files and not the dot.class file I'm getting the following errors..

C:\ProdDev\VDR PC Software\VDR Viewer 2012\VDR Viewer\src\vdrframes\mainframe>ja
vah -jni VDR_Main_Frame
Error: package com.class1.vdr does not exist
Error: package com.class1.vdr does not exist
Error: package com.class1.vdr.utils does not exist
Error: package com.class1.vdr.utils does not exist
Error: package com.class1.vdr.utils.vdr_information does not exist
Error: package com.class1.vdr.utils does not exist
Error: package org.jfree.chart does not exist
Error: package org.jfree.chart does not exist
Error: package org.jfree.chart does not exist
Error: package org.jfree.chart.axis does not exist
Error: package org.jfree.chart.axis does not exist
Error: package org.jfree.chart.plot does not exist
Error: package org.jfree.chart.renderer.xy does not exist
Error: package org.jfree.data.time does not exist
Error: package VDR_Summary_Entry does not exist
Error: cannot find symbol
symbol: class usb_vdr_device_interface
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: class JFreeChart
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: class VDRTextBox
location: class vdrframes.mainframe.VDR_Main_Frame
Error: package VDR_Summary_Entry does not exist
Error: cannot find symbol
symbol: class JFreeChart
location: class vdrframes.mainframe.VDR_Main_Frame.UpdateViewTask
Error: package VDR_Summary_Entry does not exist
Error: Could not find class file for 'VDR_Main_Frame'.
Error: package VDR_Summary_Entry does not exist
Error: cannot find symbol
symbol: class VDRTextBox
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: class DataForm
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: class DataForm
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: class ViewLogoPanel
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: class ViewLogoPanel
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: variable usb_vdr_volume_finder
location: class vdrframes.mainframe.VDR_Main_Frame
Error: cannot find symbol
symbol: variable usb_vdr_volume_finder

etc......

I've tried multiple solution via web and none seem to work.
Please Help !!

This has nothing to do with jni per se. The javah program uses the same class loader as the JVM would; it's a classpath issue. Your .class files are not stored where the classloader expected them to be. aamof the javah program is a java program itself and it uses a bit of reflection to find the native methods in your class; the problem is that it can't find all your classes.

kind regards,

Jos

Thank you...

Where do I find information on my classpaths?
I'm new to java and could use some help understanding it a bit more.
Do I need to find this under the enviroment variables in windows ? -------

If you're new to Java then what on earth are you doing mucking about with JNI?

Start with the basics.