execute shell script from a java app

Dear all
I'm able now to execute a shell script from my java application. But how
can I get the results from the shell and safe them in variables? Lets
say my shell scripts executes 'arch'. The return value would be 'i686'.
How can I get this value in a String variable?

Thanks Peter

Peter Höltschi wrote:
> I'm able now to execute a shell script from my java application. But how
> can I get the results from the shell and safe them in variables? Lets
> say my shell scripts executes 'arch'. The return value would be 'i686'.
> How can I get this value in a String variable?

Runtime.exec() returns a Process object. That allows you to get the
standard output of the programm as an InputStream.

> import java.io.*;
>
> public class Test {
> public static void main(String [] args) {
> try {
> Runtime rt = Runtime.getRuntime();
> Process ps = rt.exec("vi test.txt");
> OutputStream os = ps.getOutputStream();
> InputStream is = ps.getInputStream();
> DataOutputStream dos = new DataOutputStream(os);
> dos.writeBytes("i");
> dos.writeBytes("test");
> dos.writeBytes("u001B");
> dos.writeBytes(":wq");
> dos.flush();
> ps.waitFor();
> dos.close();
> System.out.println(ps.exitValue());
> }
> catch (Exception ex)
> {
> System.out.println(ex);
> }
> }
> }