// onjava/OSExecute.java

// (c)2021 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.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

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 onjava.OSExecuteException(

"Errors executing " + command);

}

}