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Thread: Help: Executing perl script from java

  1. #1
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    Default Help: Executing perl script from java

    Hi,

    Im trying to execute a perl script with parameters from my java code. given below is the first few lines.

     try
                {
                p = Runtime.getRuntime().exec("perl E:\\tools\\Rouge1551\\ROUGE-1.5.5.pl -n 4 -w 1.2 -m -2 4 -u -c 95 -r 1000 -f A -p 0.5 -t 0 -a E:/tools/Rouge1551/rougejk_A1.in");
     
                BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
                String line="";
     
                while ((line = input.readLine()) != null) {
                                System.out.println(line);
               }              
               p.waitFor();
               }
                catch(Exception e)
                {
                    System.out.println("Exception: "+ e.toString());
                }
                finally {
                            if (p != null) {
                            close(p.getInputStream());
                            close(p.getErrorStream());
                            close(p.getOutputStream());
                            p.destroy();}
                        }

    The program does not print anything, since p.getInputStream returns null. The command works when i run in command prompt.
    please help.

    thanks
    jessie


  2. #2
    Super Moderator Norm's Avatar
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    Default Re: Help: Executing perl script from java

    Try using a String array vs a String in the exec() method.
    Also read and print the error stream to see if there are any error messages.
    If you don't understand my answer, don't ignore it, ask a question.

  3. #3
    Junior Member
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    Default Re: Help: Executing perl script from java

    thanks a lot. it was not working because there were some warnings. i corrected it and it works.!
    great.!

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