How Can I Package a Java Application with Third-Party JAR Files and DLL Dependencies into a Single JAR?

import java.io.*;
import java.util.zip.ZipEntry;
import java.util.zip.ZipFile;

public class ExtractDLLs {

    public static void main(String[] args) {
        String jarPath = "path/to/my.jar";
        String outputDirectory = "path/to/output";

        try (ZipFile jarFile = new ZipFile(jarPath)) {
            Enumeration<? extends ZipEntry> entries = jarFile.entries();

            while (entries.hasMoreElements()) {
                ZipEntry entry = entries.nextElement();

                if (entry.isDirectory()) {
                    continue;
                }

                if (entry.getName().endsWith(".dll")) {
                    InputStream in = jarFile.getInputStream(entry);
                    OutputStream out = new FileOutputStream(new File(outputDirectory, entry.getName()));

                    byte[] buffer = new byte[1024];
                    int len;
                    while ((len = in.read(buffer)) > 0) {
                        out.write(buffer, 0, len);
                    }

                    in.close();
                    out.close();
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}