What are you trying to do? Be specific. You can't pass this struct as
an argument to a Java function in any meaningful manner.

/gordon

What Gordon says is correct.  We really need more info.

Try this:
http://www.darksleep.com/player/JavaAndUnsignedTypes.html

But String[] is wrong, for sure.  Try byte[] or short[].  char[] is
right out also, unless you are very certain of the internal character
encoding that your Java uses.

Hi Mark and Gordon, first of all, thank u for replying me.

Ok, back to the thing here. I wanted to call a function of C code from
my java application. I figured out that, some arguments of the function
is of C's typedef struct. I know that, java does not support struct. I
do not know what is the approprate data type from java that i can use
to match with this kind of arguments
such as the followings..
typedef struct {
       ULONG length;                                   // length of
binary data
       UCHAR *data;                                    // binary data

} EBUFFER;

let me add more codes here, suppose that the C function signature is

int ESX_0100 (EBUFFER *buffer)

so, on my java code (which i will run javah),
what do i write for the native method declaration?

Should I write it as..

public native int EFT_EE0801_Decipher(char[] buffer);//or
public native int EFT_EE0801_Decipher(String buffer);//or even
public native int EFT_EE0801_Decipher(String[] buffer);//?

I know that in java, the non-primitive type (such as String) and array
(of any type if not mistaken) will be assigned a memory sector that
keeps address which will point to the place where the value is actually
being kept. So, in my opinion, to address a C pointer i could use a
String or array of data types provided that the pointer is using data
type known to java. However, I do not know how to do it in the case of
addressing a custom-made data type such as in this case.

So guys, while i am still doing this reasearch, i really hope that u
guys could throw me some ideas.

Thanks a lot for the time. I do appreciate.