calling R script from java

Question

I would like to call an R script from Java. I have done google searches on the topic, but almost all of the results I have seen would require me to add a dependency to some

Answer 1

Do not wait for the process to finish with Thread.sleep()...

Use the waitFor() method instead.

Process child = Runtime.getRuntime().exec(command, environments, dataDir);

int code = child.waitFor();

switch (code) {
    case 0:
        //normal termination, everything is fine
        break;
    case 1:
        //Read the error stream then
        String message = IOUtils.toString(child.getErrorStream());
        throw new RExecutionException(message);
}