runtime.exec

I've been looking up ways to run external programs using Java's runtime. This works fine, for instance: String[] cmd = {"mkdir", "test"}; Runtime.getRuntime().exec(cmd); Creates a new directory as you would expect. Now, from a bash window in Mac I can write this: love testgame To run the 'Love' game engine on a folder called testgame. Now, the reason this works is because I've aliased 'love' to call the love executable. I have a feeling that this is the reason that the following does not work: String[] cmd = {"love", "/Users/mtc06/testgame"}; Runtime.getRuntime().exec(cmd); And nor does this

In "C", I can run a long blocking process in the background (AND HAVE IT CONTINUE TO RUN) after the starting process has exited. void main(void) { system("some_long_blocking_process &"); exit(); } // "some_long_blocking_process" is still running here (DESIRED BEHAVIOR) Java's getRuntime().exec() DOESN'T have this behavior. Instead, "some_long_blocking_process" ends immediately when the Java process ends. Anyone know how I can recapture this behavior in Java? I am using Java 1.4 (No process builder) I specifically am looking to start the long blocking process and to exit immediately (no

Runtime.getRuntime.exex("abc.exe -parameters"); using .waitFor() does not help to determine the completion of process. Process.waitFor() ( javadoc ) should work. If it doesn't work then either: there's a bug in the JVM or the OS ( highly unlikely for something like this), or there is something about the process and/or your Java code that means that the process won't exit. In current releases of Java you can also use Process.isAlive ( javadoc ) to test the process status without blocking until it finishes. For Java 7 and older there is a hacky solution that entails polling the process return

So I want to be able to write an app that can turn on and display logcat messages, dmesg, and also be able to run commands like 'ls' 'cat' 'echo' 'cd.' If I do the following: nativeProc = Runtime.getRuntime().exec("ls\n"); BufferedWriter out = new BufferedWriter(new OutputStreamWriter(nativeProc.getOutputStream())); BufferedReader in = new BufferedReader(new InputStreamReader(nativeProc.getInputStream())); String line = null; while ((line = in.readLine()) != null) { full = full + "\n" + line; } I can put the text "full" to a Text View and see the root directory. However, that's about all I can

I'm launching wkhtmltopdf from within my Java app (part of a Tomcat server, running in debug mode within Eclipse Helios on Win7 64-bit): I'd like to wait for it to complete, then Do More Stuff. String cmd[] = {"wkhtmltopdf", htmlPathIn, pdfPathOut}; Process proc = Runtime.getRuntime().exec( cmd, null ); proc.waitFor(); But waitFor() never returns. I can still see the process in the Windows Task Manager (with the command line I passed to exec(): looks fine). AND IT WORKS. wkhtmltopdf produces the PDF I'd expect, right where I'd expect it. I can open it, rename it, whatever, even while the

I have a program where I was able to successfully execute cmd commands from my code, but I want to be able to get the output from the cmd command. How can I do that? So far my code is: Second.java: public class Second { public static void main(String[] args) { System.out.println("Hello world from Second.java"); } } and Main.java public class Main { public static void main(String[] args) { String filename = args[1].substring(0, args[1].length() - 5); String cmd1 = "javac " + args[1]; String cmd2 = "java " + filename; Runtime r = Runtime.getRuntime(); Process p = r.exec(cmd1); // i can verify

I have been through the StreamGobbler at the following URL JavaWorld : Stream Gobbler I understand the usage and the reason on why it has been implemented. However the scenarios covered are only those wherein there could be an output from the command / handling error's. I do not find any scenario wherein StreamGobbler is used to handle inputs. For example, in mailx , I have to specify the body of the email, which I have done in the following format Process proc = Runtime.getRuntime().exec(cmd); OutputStreamWriter osw = new OutputStreamWriter(proc.getOutputStream()); osw.write(mailBody); osw