Topic: Running a command line executable from java

Running a command line executable from java

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Posted By: David_Hardoon
Posted On: Wednesday, February 26, 2003 04:23 AM

A pretty strage forward question, I would like to be able to execute
a command line prompt from java if possible. I tried using the
Runtime.getRuntime().exec("echo hello"); - though sadly when I run
the application it did not produce a 'hello' on the prompt.

Another thing is if I have an (for say script) which produces a list
of words, after executing it trough java can I 'grab' the words
thrown out of the script?

Thanks in advance
David.

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Re: Running a command line executable from java

Posted By: Bahman_Barzideh
Posted On: Wednesday, February 26, 2003 06:02 AM

Try the following rather crude program:


public class Test{

  public static void main (String args []) {

    try {
      Process p = Runtime.getRuntime ().exec ("echo hello");
      java.io.InputStream is = p.getInputStream ();
      int res = 0;
      while ((res = is.read ()) >= 0) {
        System.out.print ((char) res);
      }
    }
    catch (Exception e){
      e.printStackTrace ();
    }

  }
}

It should answer both your questions.

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