How use JNA, a demonstration

JNA

Java Native Access is an extension to Java that allows the use of native APIs by including dynamically library files, DLLs under Windows.

JNA is a simpler alternative to JNI which does not require to generate code for using C functions. To use them, simply include the file that defines them and declare the header of these functions in an interface.
Demonstration

To use the puts function of the C language, which is provided by the msvcrt.dll file in Windows, create the following interface:

package CInterface;

import com.sun.jna.Library;

public interface CInterface extends Library
{
public int puts(String str);
}

We have declared the CInterface interface which is a subclass of J