command line interface - How to use CLI application from node.js child process? -

i wordering how use application command line interface node.js. here node.js code:

var spawn = require('child_process').spawn; var child = spawn('java', ['helloworld']);  child.stdout.pipe(process.stdout); child.stdin.write("tratata\r\n;");  child.stdin.end(); 

it runs java helloworld cli app.

here java code:

import java.io.console;  public class helloworld {     public static void main(string[] args) {         system.out.println("started");          console console = system.console();          while (true) {             string s = console.readline();             system.out.println("your sentence:" + s);         }     } } 

but doesn't work. when child.stdin.write executs - nothing happening.

disclaimer: know next nothing java.

my guess java.io.console lot more reading stdin, opening console device (/dev/tty on unix-like os'es) itself, thereby circumventing stdin/stdout/stderr devices being passed in node.

if use java.io.bufferedreader, works better:

import java.io.ioexception; import java.io.inputstreamreader; import java.io.bufferedreader;  public class helloworld {     public static void main(string[] args) {         system.out.println("started");          bufferedreader reader = new bufferedreader(new inputstreamreader(system.in));          while (true) {             try {                 string s = reader.readline();                 if (s == null) return; // end of stream reached                 system.out.println("your sentence:" + s);             } catch(ioexception e) {             }         }     } }