Capturing stdout when calling Runtime.exec

You need to capture both the std out and std err in the process. You can then write std out to a file/mail or similar.

See this article for more info, and in particular note the StreamGobbler mechanism that captures stdout/err in separate threads. This is essential to prevent blocking and is the source of numerous errors if you don't do it properly!

Use ProcessBuilder. After calling start() you'll get a Process object from which you can get the stderr and stdout streams.

UPDATE: ProcessBuilder gives you more control; You don't have to use it but I find it easier in the long run. Especially the ability to redirect stderr to stdout which means you only have to suck down one stream.