Problems when calling a c++ program from java using JNI -

i doing sample demonstration program call c++ program java. have gone through java jni framework , followed samples. implementing sample in aix 5 powerpc system. here java code snippet.

public class helloworld {   public native void hellocpp();   public  native int getempid();   public static void main(string[] args) {     //system.loadlibrary("occidml");     system.loadlibrary("javatocpp"); // shared object file.     helloworld hello=new helloworld();     system.out.println("calling c++ methods java");     hello.hellocpp();     system.out.println("retrieve value c++");     int i_perf_obj=hello.getperfobj();     system.out.println("i_perf_obj value c++ program"+i_perf_obj);   } } 

generated header file above compiling. below c++ program occi database connection implementation calling java

#include <iostream> #include "helloworld.h" #include <occi.h>  using namespace oracle::occi; using namespace std;  jniexport void jnicall java_helloworld_hellocpp   (jnienv *, jobject) {    cout<<"hello world form c++"<<endl;   return; }  jniexport jint jnicall java_helloworld_getempid   (jnienv *env , jobject obj) {    cout<<"in side c++ program";    int empid=0;       cout<<"calling occi method retreiveperfobj()";      environment *env;   connection *conn;   statement *stmt;    string user = "hr";   string passwd = "admin";   string db = "mydb:1521/mydb";    env = environment::createenvironment(environment::default);   cout<<"environment created"<<endl;   cout<<"user:"<<user<<"\tpass:"<<passwd<<"\tdb:"<<db<<endl;   conn = env->createconnection (user, passwd, db);   cout<<"connection established"<<endl;   string sqlstmt = "select id emp emp_id=123";   stmt = conn->createstatement (sqlstmt);   resultset *rset = stmt->executequery ();   try{     while (rset->next ())     {       i_perf_obj=rset->getint (1);       cout << "i_perf_obj: "<<i_perf_obj<< "\t\t"<< endl;     }   }catch(sqlexception ex)   {     cout<<"exception thrown displayallrows"<<endl;     cout<<"error number: "<<  ex.geterrorcode() << endl;     cout<<ex.getmessage() << endl;   }    stmt->closeresultset (rset);   conn->terminatestatement (stmt);   cout << "terminating connection......" << endl;   env->terminateconnection (conn);   cout << "connection terminated" << endl;   environment::terminateenvironment (env);   cout << "environment terminated" << endl;    cout<<"returning value c++ program";   return empid; }   int main(){} 

i compiled c++ program using following command.

   make buildocci objs=javatocpp.o exe=javatocpp      xlc -c -i/usr/appl/pmr/uat/oci-11.2.0.4.0/instantclient_11_2/sdk/include -      i/usr/java5/include -q64 -qlongdouble -i/usr/appl/pmr/uat/oci-      11.2.0.4.0/instantclient_11_2/sdk/include  javatocpp.cpp       xlc -o javatocpp -q64 javatocpp.o -l/usr/appl/pmr/uat/oci-      11.2.0.4.0/instantclient_11_2/ -locci -lclntsh 

and generated shared library below.

  xlc -q64 -g  -qmkshrobj javatocpp.o -o javatocpp.so 

when ran java program

java helloworld 

am getting below error.

exception in thread "main" java.lang.unsatisfiedlinkerror:     /usr/appl/pmr/uat/temp/jk225/javatocppdemo/javatocpp.so (could not load module      /usr/appl/pmr/uat/temp/jk225/javatocppdemo/javatocpp.so.     module has invalid magic number.)      @ java.lang.classloader.loadlibrarywithpath(classloader.java:995)     @ java.lang.system.load(system.java:441)     @ helloworld.main(helloworld.java:16) 

can please me how solve this.

thanks in advance.