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Byte array as input

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I saw the question about  byte arrays as arguments.  The posted solution was for byte array as an output.  I have the other side of this problem.  How do I pass in a byte array to a C function?  

When I convert to a char array, the unprintable characters (outside of the standard ascii type) get lost and my resulting array is garbage.

Can I create an integer array using the int value of the byte and pass that?

Thanks in advance for the help.

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I found my solution.  For anyone wanting to know... here is how the conversion is done...

char[] charArr = new char[image.length];

for (int i = 0; i < charArr.length; i++) {

   charArr = (char)(image & 0xFF);


args[2] = Pointer.create("char*", charArr);

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