J2V8 sample https://github.com/eclipsesource/J2V8

Mapp.java

import com.eclipsesource.v8.JavaCallback;
import com.eclipsesource.v8.NodeJS;

import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;

public class Mapp {
    private static String NODE_SCRIPT = "var http = require('http');\n"
            + ""
            + "var server = http.createServer(function (request, response) {\n"
            + " response.writeHead(200, {'Content-Type': 'text/plain'});\n"
            + " response.end(someJavaMethod());\n"
            + "});\n"
            + ""
            + "server.listen(8000);\n"
            + "console.log('Server running at http://127.0.0.1:8000/');";

    public static void main(String[] args) throws IOException {
        final NodeJS nodeJS = NodeJS.createNodeJS();
        JavaCallback callback = (receiver, parameters) -> "Hello, JavaWorld!";

        nodeJS.getRuntime().registerJavaMethod(callback, "someJavaMethod");
        Path f = Paths.get("meh.js").toAbsolutePath();
        Files.write(f.toAbsolutePath(), NODE_SCRIPT.getBytes());

        nodeJS.exec(f.toFile());

        while (nodeJS.isRunning()) {
            nodeJS.handleMessage();
        }
        nodeJS.release();
    }

}