mainProgram.js

const spawn = require("child_process").spawn;

function sumOfNumbers(numbers) {
  let args = [];
  args.push("SumOfNumbers"); // Making our Java filename as the first argument to be picked by the java command

  // Push the numbers as the other arguments
  numbers.forEach((element) => {
    args.push(element);
  });

  // Starting our worker
  console.log("Starting our worker to execute our Java Snippet");
  let worker = spawn("java", args);
  worker.stdout.on("data", function (data) {
    console.log("The sum as processed by our Java Snippet is : " + data);
  });
  worker.on("close", function (code, signal) {
    console.log("Our Java Snippet has finished with an exit code of " + code);
  });
}

sumOfNumbers([1, 2, 3]); // Driver