UNIX for Advanced & Expert Users

hi all
i have a unix machine (FBD). I have Also installed java of Version (j2sdk1.4.1_07) on unix machine. Now i

want to Call C Native function in Java Which is declared as Native. i am doing this by following steps:
1) Making Echo.java File Which is having The following lines of code.
class Echo {
public native void runEcho();

static {
System.loadLibrary("echo");
}

public static void main(String[] args) {
new Echo().runEcho();
}
}
2) Compiling the Code:
$ javac Echo,java
$ javah Echo ----- which will make the header file used in c programe
3) writing the EchoImp.c File Which contains the following line of code
#include "jni.h"
#include "Echo.h"//the java class above compiled with javah
#include <stdio.h>

JNIEXPORT void JNICALL
Java_Echo_runEcho(JNIEnv *env, jobject obj)
{
char buf[64];
gets(buf);
printf(buf);
}
4) Making the Library echo
$ cc -G -I/usr/local/java/include -I/usr/local/java/include/linux
Echo.c -o libecho.so
5) Now Setting The Libarary Path
$ setenv LD_LIBRARY_PATH <Path>
6) Now Finally Excute the Java Program to call c function
$ java Echo


but while executing i m getting Error Like :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no echo in java.libra
ry.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
at Echo.<clinit>(Echo.java:5)

i have also set the path but no results ....
plz help me out

Kamal Kant
email removed
sb

Executing Java code for calling Native Method of C Unix Machine



hi all
i have a unix machine (FBD). I have Also installed java of Version (j2sdk1.4.1_07) on unix machine. Now i

want to Call C Native function in Java Which is declared as Native. i am doing this by following steps:
1) Making Echo.java File Which is having The following lines of code.
class Echo {
public native void runEcho();

static {
System.loadLibrary("echo");
}

public static void main(String[] args) {
new Echo().runEcho();
}
}
2) Compiling the Code:
$ javac Echo,java
$ javah Echo ----- which will make the header file used in c programe
3) writing the EchoImp.c File Which contains the following line of code
#include "jni.h"
#include "Echo.h"//the java class above compiled with javah
#include <stdio.h>

JNIEXPORT void JNICALL
Java_Echo_runEcho(JNIEnv *env, jobject obj)
{
char buf[64];
gets(buf);
printf(buf);
}
4) Making the Library echo
$ cc -G -I/usr/local/java/include -I/usr/local/java/include/linux
Echo.c -o libecho.so
5) Now Setting The Libarary Path
$ setenv LD_LIBRARY_PATH <Path>
6) Now Finally Excute the Java Program to call c function
$ java Echo


but while executing i m getting Error Like :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no echo in java.libra
ry.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
at Echo.<clinit>(Echo.java:5)

i have also set the path but no results ....
plz help me out

Kamal Kant
email removed
sb

Executing Java code for calling Native Method of C On Unix Machine
hi all
i have a unix machine (FBD). I have Also installed java of Version (j2sdk1.4.1_07) on unix machine. Now i

want to Call C Native function in Java Which is declared as Native. i am doing this by following steps:
1) Making Echo.java File Which is having The following lines of code.
class Echo {
public native void runEcho();

static {
System.loadLibrary("echo");
}

public static void main(String[] args) {
new Echo().runEcho();
}
}
2) Compiling the Code:
$ javac Echo,java
$ javah Echo ----- which will make the header file used in c programe
3) writing the EchoImp.c File Which contains the following line of code
#include "jni.h"
#include "Echo.h"//the java class above compiled with javah
#include <stdio.h>

JNIEXPORT void JNICALL
Java_Echo_runEcho(JNIEnv *env, jobject obj)
{
char buf[64];
gets(buf);
printf(buf);
}
4) Making the Library echo
$ cc -G -I/usr/local/java/include -I/usr/local/java/include/linux
Echo.c -o libecho.so
5) Now Setting The Libarary Path
$ setenv LD_LIBRARY_PATH <Path>
6) Now Finally Excute the Java Program to call c function
$ java Echo


but while executing i m getting Error Like :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no echo in java.libra
ry.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
at Echo.<clinit>(Echo.java:5)

i have also set the path but no results ....
plz help me out

Kamal Kant
email removed
sb

sbeyonduf007, you are flooding the forum with your posts. Please do not do that. I have merged all the threads.

As for the actual problem, I think LD_LIBRARY_PATH should be available on FreeBSD.

Code:

export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/path/to/dir/containing/echo.so

Executing Java code for calling Native Method of C On Unix Machine
hi all
i have a unix machine (FBD). I have Also installed java of Version (j2sdk1.4.1_07) on unix machine. Now i

want to Call C Native function in Java Which is declared as Native. i am doing this by following steps:
1) Making Echo.java File Which is having The following lines of code.
class Echo {
public native void runEcho();

static {
System.loadLibrary("echo");
}

public static void main(String[] args) {
new Echo().runEcho();
}
}
2) Compiling the Code:
$ javac Echo,java
$ javah Echo ----- which will make the header file used in c programe
3) writing the EchoImp.c File Which contains the following line of code
#include "jni.h"
#include "Echo.h"//the java class above compiled with javah
#include <stdio.h>

JNIEXPORT void JNICALL
Java_Echo_runEcho(JNIEnv *env, jobject obj)
{
char buf[64];
gets(buf);
printf(buf);
}
4) Making the Library echo
$ cc -G -I/usr/local/java/include -I/usr/local/java/include/linux
Echo.c -o libecho.so
5) Now Setting The Libarary Path
$ setenv LD_LIBRARY_PATH <Path>
6) Now Finally Excute the Java Program to call c function
$ java Echo


but while executing i m getting Error Like :
Exception in thread "main" java.lang.UnsatisfiedLinkError: no echo in java.libra
ry.path
at java.lang.ClassLoader.loadLibrary(ClassLoader.java:1403)
at java.lang.Runtime.loadLibrary0(Runtime.java:788)
at java.lang.System.loadLibrary(System.java:832)
at Echo.<clinit>(Echo.java:5)

i have also set the path but no results ....
plz help me out

Kamal Kant
sb

sbeyonduf007, I have just merged another of your posts into this thread. Also, do *not* post your email address with your posts. It is against the rules and your post will be edited to remove the email address.