import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.io.IOException;

public class CmndExec {

    public static void main(String[] args) {
        String[] cmdArr = new String[]{"CQperl",
                                       "-e",
                                       "print \"Hello Elisheva\""};
        System.out.println("Exit status: " + execute(cmdArr));
    }

    public static int execute(String[] cmdArr) {
        int returnValue = -1;
        if (cmdArr != null  &&  cmdArr.length > 0) {
            Process p = null;
            Runtime rt = Runtime.getRuntime();
            try {
                p = rt.exec(cmdArr);  // throws IOException
                returnValue = p.waitFor();    // throws InterruptedException
            }
            catch (IOException xIo) {
                throw new RuntimeException("Error executing command.",
                                           xIo);
            }
            catch (InterruptedException xInterrupted) {
                throw new RuntimeException("Command execution interrupted.",
                                           xInterrupted);
            }
            InputStreamReader isr = new InputStreamReader(p.getInputStream());
            BufferedReader stdout = null;
            stdout = new BufferedReader(isr);
            String line = null;
            try {
                while ((line = stdout.readLine()) != null) {
                    System.out.println(line);
                }
            }
            catch (IOException xIo) {
                throw new RuntimeException("Error reading process output",
                                           xIo);
            }
        }
        return returnValue;
    }
}