// Run an operating system command

// and send the output to the console.

package thinkinginjava.util;

import java.io.*;

public class OSExecute {

public static void command(String command) {

boolean err = false;

try {

Process process = new ProcessBuilder(command.split(" ")).start();

BufferedReader results = new BufferedReader(new InputStreamReader(

process.getInputStream()));

String s;

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

System.out.println(s);

BufferedReader errors = new BufferedReader(new InputStreamReader(

process.getErrorStream()));

// 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) {

// Compensate for Windows 2000, which throws an

// exception for the default command line:

if (!command.startsWith("CMD /C"))

command("CMD /C " + command);

else

throw new RuntimeException(e);

}

if (err)

throw new OSExecuteException("Errors executing " + command);

}

}