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From: clusardi2k@aol.com
Newsgroups: comp.lang.java.programmer
Subject: Using JNI to Invoke C++ Method from Java via NetBeans 7.1.2 (Question: How to Import Stuff?)
Date: Thu, 14 Jun 2012 12:43:30 -0700 (PDT)
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Hello,

I want to call a series of C++ routines from java using the Java Native Int=
erface. The IDE that I'm using is NetBeans 7.1.2.

Below is a two part description. The first part is background. It explains =
how I was told to setup two jar files that refer to my C++ routines. The se=
cond part is the wrong part. The second part is my feeble attempt at changi=
ng my code so that it invokes a routine in the C/C++ library.

(Part 1)
I setup NetBeans to use 2 dot jar files to refer to my C++ class'. I was to=
ld to follow these steps. The steps that I followed to do this are.=20

Start NetBeans, highlight the name of the current project, right click on i=
t, select Add Library, select Create..., name the library MY_TEST, click ok=
, press the "Add JAR/Folder..." button, and select the two jar files that w=
ere given to me.

The 2 jar files now appear on the left side of the IDE under MY_TEST. Below=
 that is a description of each method in the file. This is what appears on =
the left of the IDE:

Libraries
   MY_TEST - name_of_jar_file1.jar
     META-INF
       MANIFEST.MF
     one.very.long.dotted.thing

   MY_TEST - name_of_jar_file2.jar
     META-INF
       MANIFEST.MF
     one.very.long.dotted.widget
   Beans Binding - beansbinding-1.2.1.jar
   JDK 1.7 (Default)

At this point, is it possible to just import one of the class' in the jar f=
ile, instantiate it, and then call the method desired. How would I go about=
 doing this?

(Part 2)
0) FYI: There is only one class in this simple dot java program.=20
1) Without instantiating a class listed in one of the dot jar files, I put =
a call to a method (my_one_test) listed in one of the jar files (my_test do=
es not exist anywhere else),
2) in the same dot java file, I created the following routine prototype for=
 my_one_test:

 "private native void my_one_test()", and=20

3) at the start of the class (in the dot java program), I added the lines:

    static {
      System.load ("C:\\User_name_0\\dist\\lib\name_of_jar_file1.jar");
      System.load ("C:\\User_name_0\\dist\\lib\name_of_jar_file2.jar");
    }=20

This compiles, but I get the following runtime error:

java.lang.UnsatisfiedLinkError: C:...\dist\lib\name_of_jar_file1.jar: Can't=
 load this .dll (machine code=3D0x23) on a IA 32-bit platform

What do I do. Would creating a dot h file help.


Thanks,
First Time JNI user