help in javah

[Vishal Gautam]

Hi

I am a newbee to java and jni

I have following code


package com.vishal.practice;
import java.io.PrintWriter;
public class NativeDemo
{
int i;
public static void main(String[] args)
{
NativeDemo ob = new NativeDemo();

ob.i = 10;
PrintWriter pw = new PrintWriter(System.out);
pw.write("Before: " + ob.i);
ob.test();
pw.write("After: " + ob.i);
}

public native void test();

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



I have compiled the code to build .class file

when I try to execute the following command

javah -jni com.vishal.practice NativeDemo

I get the following error

Error: Class com.vishal.practice.NativeDemo could not be found.

Not Sure what the reason is.

Please Help

Regards
Vishal

[Marilyn de Queiroz]

package com.vishal.practice;
import java.io.PrintWriter;
public class NativeDemo
{
    int i;
    public static void main(String[] args)
    {
        NativeDemo ob = new NativeDemo();
        
        ob.i = 10;
        PrintWriter pw = new PrintWriter(System.out);
        pw.write("Before: " + ob.i);
        ob.test();
        pw.write("After: " + ob.i);
    }
    
    public native void test();
    
    static
    {
        System.loadLibrary("NativeDemo");
    }
}

[b]I am a newbee to java and jni</b>

I think that jni is not a beginner topic. However, I wonder if your problem is in the way you are using the command rather than with your code. What if you put a dot before NativeDemo? Like this:

javah -jni com.vishal.practice.NativeDemo