Question: i am triyng to generate header file for native use (c/c++) from a java file using eclipse.
from the command line i can only reach the javah when i am in this location :

```
C:\Program Files (x86)\Java\jdk1.7.0_51\bin>

```

but i cant reference my java class like so :

```
C:\Program Files (x86)\Java\jdk1.7.0_51\bin>javah -jni com.or.jnihelloworld.nativeclass

```

because the class located outside of this folder at :

```
C:\Users\Or Azran\workspace\JniHelloWorld\src\NativeLib.java

```

and i want to make this file in to a jni folder in :

```
C:\Users\Or Azran\workspace\JniHelloWorld\jni

```

how can i do it from command line?
a good toturial will be also great

Answer: 
There appears to be a couple of issues to solve here.

First. I'm not sure that your source code is set up correctly. If indeed your class is com.or.jnihelloworld.nativeclass then it should be in directory: C:\Users\Or Azran\workspace\JniHelloWorld\src\com\or\jnihelloworld\nativeclass.java

However, assuming that the class/directory is correct. The javah command uses -d to specify the output directory, and you can specify the path with -classpath so 

```
javah -classpath "C:\Users\Or Azran\workspace\JniHelloWorld\src\" \ 
-d "C:\Users\Or Azran\workspace\JniHelloWorld\jni" com.or.jnihelloworld.nativeclass

```

should put the file where you want it.
Your PATH doesn't include the bin directory of the JDK.