There are many reasons that waitFor() doesn’t return. But it usually boils down to the fact that the executed command doesn’t quit. This, again, can have many reasons. One common reason is that the process produces some output and you don’t read from the appropriate streams. This means that the process is blocked as soon … Read more
Why do some commands fail? This happens because the command passed to Runtime.exec(String) is not executed in a shell. The shell performs a lot of common support services for programs, and when the shell is not around to do them, the command will fail. When do commands fail? A command will fail whenever it depends … Read more
Runtime rt = Runtime.getRuntime(); Process pr = rt.exec(“java -jar map.jar time.rel test.txt debug”); http://docs.oracle.com/javase/7/docs/api/java/lang/Runtime.html
Write a script, and execute the script instead of separate commands. Pipe is a part of the shell, so you can also do something like this: String[] cmd = { “/bin/sh”, “-c”, “ls /etc | grep release” }; Process p = Runtime.getRuntime().exec(cmd);
Batch files are not an executable. They need an application to run them (i.e. cmd). On UNIX, the script file has shebang (#!) at the start of a file to specify the program that executes it. Double-clicking in Windows is performed by Windows Explorer. CreateProcess does not know anything about that. Runtime. getRuntime(). exec(“cmd /c … Read more