How can I programmatically get the JNA version being used at runtime?

Question

I'm trying to print the JNA version being used to my logs, at runtime.

How do I get the version of JNA through code at runtime?

Answer 1

The current JNA version is written at build time to a constant VERSION in the appropriately-named Version interface. That interface is package private, but is implemented by the Native class, making the constant publicly available from Native. (Linters may complain.) So you can simply do:

import com.sun.jna.Native;

public class Test {
    public static void main(String[] args) {
        System.out.println("JNA Version: " + Native.VERSION);
    }
}

Output:

JNA Version: 5.6.0

You can also get the version of the native bits, which follow a different numbering scheme than the overall project version (which is incremented with new mappings that don't change the compiled native portions), but may be relevant in some contexts:

System.out.println("JNA Native Version: " + Native.VERSION_NATIVE);

The Native class also exposes a boolean isCompatibleVersion() method which you can use to check whether JNA is at least the specified version or higher.