javascript - Call to node js application inside java project -

i've create new java project following code open command line project path.in java project i've added 2 files(under root) app.js , package json,now want invoke node app.js

i use following code open command line working ok

process newproc = runtime.getruntime().exec("cmd /c start cmd.exe"); outputstream out = newproc.getoutputstream(); 

if put in command line manually(which opened above program): node app.js the node js starting ok. want of java code like

runtime.getruntime().exec("cmd /c start cmd.exe node app.js"); 

and either runtime.getruntime().exec("node app.js");

when try not working...

my java project followoing

myproj     src    web    app.js    package.json 

update this app.js file

var express = require('express');  var app = express();  app.get('/', function (req, res) {      res.send("test app running"); });   var server = app.listen(3005, function () {         console.log("listen" + 3005)     } ) 

try processbuilder instead of runtime:

processbuilder pbuilder = new processbuilder("c:\\program files\\nodejs\\node.exe", "c:\\temp\\app.js"); process process = pbuilder.start();  process.waitfor();