processbuilder

I'm trying to write a program that compiles another java file from the command prompt. I'm having an issue with it however. At this point, it is successfully executing the first part where it compiles Mocha.java. However, I want it to also execute that file and display what it outputs. It displays nothing. Any suggestions? pb = new ProcessBuilder("javac","Mocha.java"); try { Process shell = pb.start(); OutputStream shellOut = shell.getOutputStream(); shellOut.write("java Mocha".getBytes()); shellOut.close(); InputStream shellIn = shell.getInputStream(); String response = IOUtils.toString

On linux (debian), I can run this command: /usr/lib/jvm/jdk1.7.0_21/bin/java -jar ~/myjar.jar ".*" I am trying to run it from a Java program instead with: ProcessBuilder pb = new ProcessBuilder(java, "-jar", "~/myjar.jar", "\".*\""); System.out.println(pb.command()); prints the following, as expected: [/usr/lib/jvm/jdk1.7.0_21/bin/java, -jar, ~/myjar.jar, ".*"] However I don't get the same output from the program (it runs but the ouput looks as if the ".*" argument is not properly taken into account). Any ideas why it doesn't work? Note: the same code works fine on Windows. Looks like the

I am trying to call an external windows application (i.e. calc.exe) when a user clicks on a button in a GWT web application. Is there a way on how to do it? Below are what I have already tried so far: 1.) Tried Runtime.exec and ProcessBuilder but I end up having a GWT compile error Runtime.exec Code: Process winCalc; try { winCalc = Runtime.getRuntime().exec("\"C:/Windows/System32/calc.exe\""); winCalc.waitFor(); } catch (IOException e) { e.printStackTrace(); } catch (InterruptedException e) { e.printStackTrace(); } Runtime.exec Code - GWT Compile Error: Rebinding dir.ClientGinjector Checking

Can anyone clarify me if the below procedure is correct way to handle streams of process without any stream buffer full and blocking problems I'm invoking external program from java program, I'm using ProcessBuilder to build the process and after I perform Process gpgProcess = processBuilder.start(); I'm handling the process using a method String executionResult = verifyExecution(gpgProcess); and in my method i'm trying to handle the process streams private String verifyExecution(Process gpgProcess) throws IOException, InterruptedException { String gpgResult = null; BufferedReader stdOut = new

I am trying to decode an mp3 file to a wav file by using the ProcessBuilder class under Linux. For some reason the process does not stop so that I have to cancel it manually. Could somebody give me a hint on this. I think that the quoted code is very easy to reproduce: import java.io.*; public class Test { public static void main(String[] args) { try { Process lameProcess = new ProcessBuilder("lame", "--decode", "test.mp3", "-").start(); InputStream is = lameProcess.getInputStream(); FileOutputStream fileOutput = new FileOutputStream("test.wav"); DataOutputStream dataOutput = new