running elasticsearch from java code

I want to run elastic search from a servlet. I use this method in my servlet to run elasticsearch but it does not seem to work.

ejbsessionbean.runcommand( "cmd C:\\ELK\\elasticsearch\\bin\\elasticsearch";)

The code for runcommand follows:

  public  static void runcommand(String ch) throws IOException {

   if (ch.length() <= 0) {
     System.err.println("Need command to run");
   System.exit(-1);
      }

         Runtime runtime = Runtime.getRuntime();
   Process process = runtime.exec(ch);
   InputStream is = process.getInputStream();
   InputStreamReader isr = new InputStreamReader(is);
   BufferedReader br = new BufferedReader(isr);
   String line;

   System.out.printf("Output of running %s is:", 
       ch);

   while ((line = br.readLine()) != null) {
     System.out.println(line);
   }

}