// onjava/OSExecute.java
// (c)2017 MindView LLC: see Copyright.txt
// We make no guarantees that this code is fit for any purpose.
// Visit http://OnJava8.com 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()))
 ) {
 results.lines()
 .forEach(System.out::println);
 err = errors.lines()
 .peek(System.err::println)
 .count() > 0;
 }
 } catch(IOException e) {
 throw new RuntimeException(e);
 }
 if(err)
 throw new OSExecuteException(
 "Errors executing " + command);
 }
}