Question

I want to run a jar from a java class, how could I do that? Something like:

public static void main(String[] args) {
    Process process = Runtime.getRuntime().exec("java --jar grok.jar");
}

I’d be running this from within my IDE, eclipse. I’m not sure how to use the returned process to check the result of the command. It would also be nice if I could direct the output of the jar to a location of my choosing. This could probably be accomplished using “process.getOutputStream()”, but since the jar will launch a blocking process, not sure how that would work?

Thanks

Answer 1

The question is already answered here. Look at this answer for example, it should give you an idea on how to start a process and get the output as an InputStream.

    Process ps=Runtime.getRuntime().exec(new String[]{"java","-jar","A.jar"});
    ps.waitFor();
    java.io.InputStream is=ps.getInputStream();