How to get the process id after running an application from Java under Linux

July 19, 2009 at 11:00 am (Java, Linux)
Tags: *nix, application, code, command, echo, exec, get, id, input stream, Java, Linux, pid, process, runtime, sample, shell, unix

Use the following sample code to get the pid(process id) on *nix variants, after running it as a command from Java using Runtime.exec() .

The command variable, in my case, was running another Java application.

try {

Process  process=Runtime.getRuntime().exec(new String [] {"sh","-c",command+"  &  echo $!"} );
BufferedReader br=new BufferedReader(new InputStreamReader(process.getInputStream()));

String ps=br.readLine();
int pid=Integer.valueOf(ps);
} catch (IOException e2) {
// TODO Auto-generated catch block
e2.printStackTrace();
}