// onjava/OSExecute.java

// (c)2016 MindView LLC: see Copyright.txt

// We make no guarantees that this code is fit for any purpose.

// Visit http://mindviewinc.com/Books/OnJava/ for more book information.

// Run an operating system command

// and send the output to the console

package onjava;

import java.io.*;

public class OSExecute {

public static void command(String command) {

boolean err = false;

try {

Process process =

new ProcessBuilder(command.split(" ")).start();

try(BufferedReader results = new BufferedReader(

new InputStreamReader(process.getInputStream()));

BufferedReader errors = new BufferedReader(

new InputStreamReader(

process.getErrorStream()))) {

String s;

while((s = results.readLine())!= null)

System.out.println(s);

// Report errors and return nonzero value

// to calling process if there are problems:

while((s = errors.readLine())!= null) {

System.err.println(s);

err = true;

}

}

} catch(Exception e) {

throw new RuntimeException(e);

}

if(err)

throw new OSExecuteException(

"Errors executing " + command);

}

}