OnJava8-Examples/onjava/OSExecute.java at master · BruceEckel/OnJava8-Examples · GitHub

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// onjava/OSExecute.java

// 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);

}

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