Java.lang.UnsatisfiedLinkError:display

Question

Hi All,
I am trying to call one C++ function using JNI call in java.I am able to load the dll using java code but when i trying to call the native method in java class its throws an error given below::
java.lang.UnsatisfiedLinkError:display
and the dispaly is the native method inside my java class and which is exposed inside the dll.
My Code is Given Below::
*public class JNIInvocation {*+
*    // Native method declaration*<br
*    // Load the DLL from java.path.entry*
+*    static {*+
*        System.load("D:\\delfigoSecurity\\DLL\\delfigo.dll");*
*     * @param args*
+*    public static void main(String[] args) {*+
*        // Call C+ method*+
+*        try {*+
*            JNIInvocation lInvocation = new JNIInvocation();*
+*           {color:#993300} int lDisplay = lInvocation.display(); //Throwing error here{color}*+
*            System.out.println(lDisplay);*
+*        } catch (Error e) {*+
*            e.printStackTrace();*
Error is throwing on the line which i have made a brown color.
Can any one help me out on this..Why i am getting this error.
Thanks in advance
Regards
Debapriya

Answer 1

You have completely ignored what [jschell has already told you|http://forums.sun.com/thread.jspa?messageID=10670625#10670625].
1) i have created a .dll file out of my C++ code .The first step is to write a Java class with one or more native methods.
2)Then i am trying to load the .dll file usingThe second step is to compile that class and run javah on it.
The third step is to create a C or C++ file that includes the .h file created by javah, and fill in the implementations of the methods declared in the .h file.
The fourth step is to have those implementations call your existing C++ code.
The fifth step is to compile and link all that as a DLL.
The sixth step is to load that DLL as you are doing in your 2nd step.
So you are missing a large number of steps.
You need to have a look at the JNI documentation. At present you're just guessing. And ignoring what you've been told here. You'll never solve anything that way.