The command "javac -h" and "javah -jni" can't find the file I specified

Question

I'm trying to generate the header file (MyClass.h) using the command javah -jni MyClass.java since I use the JDK 1.8 but I also tried with the other version of the command javac -h MyClass.java but I always get the following result in my terminal :

All my .java or .class file are in this folder.

Thank you for the help
[edit] I also tried with the .class file but the output is the same with javac -h but with javah -jni I get the following output :

Answer 1

Try to compile SimpleJNI.java first and then execute javah command.

Sample class

public class SimpleJNI
{
   public static void someMethod()
   {
      System.out.println("Some method");
   }
}

Compile is using javac with -classpath if there is any external dependency required.

javac -classpath <path_to_dependency> SimpleJNI.java 

or without -classpath if there is no dependency

javac SimpleJNI.java

then execute javah with your .class file

javah SimpleJNI