Re: [O] [babel] ob-java error org-babel-execute-src-block: Wrong type argument: characterp, "-cp ."

[Eric Schulte]

Torsten Wagner <address@hidden> writes:

> Hi all,
>
> every year I want like to evaluate java snippets in org-mode to
> evaluate courseworks.
> This worked fine but recently I had a bigger data crash and re-setup
> my office machine.
> It worked ok for the crash (that is it worked ok for the set-up at that time).
>
> I use now
>
> GNU Emacs 24.1.1
> Org-mode version 7.8.11
>
> I can evaluate simpler blocks but for more complex once I run into trouble
> I used
>
> #+BABEL: :mkdirp t
> #+BABEL: :cmpflag -cp .
> #+BABEL: :cmdline -cp .
>

The above should use standard property lines, see (info "(org)Buffer-wide 
header arguments")

>
> #+begin_src emacs-lisp
> (setq org-babel-default-header-args:java '((:cmpflag "-cp .")
> (:cmdline "-cp .")))
> #+end_src
>

This seems to me to be redundant with the above.  No need to set these
for the language and the buffer.

Best,

>
>
> ** CODE-TESTER
> #+BEGIN_SRC java :classname enshu4/Shop4Tester
> package enshu4;
> public class Shop4Tester {
>       public static void main(String[] args) {
>               System.out.println("----------Checking for list 1---------");
>               Shop4 shop1 = new Shop4("item1.txt");
>               shop1.print("potato");
>               shop1.printAllNames();
>
>               System.out.println("\n----------Checking for list 2----------");
>               Shop4 shop2 = new Shop4("item2.txt");
>               shop2.print("potato");
>               shop2.printAllNames();
>       }
> }
> #+END_SRC
>
>
> ** studentID
> #+BEGIN_SRC java :classname enshu4/Shop4
> package enshu4;
>
> import java.util.Hashtable;
> import java.util.Iterator;
> import java.io.BufferedReader;
> import java.io.FileReader;
> import java.io.IOException;
> import java.io.FileNotFoundException;
>
> public class Shop4 {
>     private Hashtable<String, Integer> item;
>
>     public void printAllNames() {
>       String tes;
>         Iterator<String> it = item.keySet().iterator();
>         while (it.hasNext()) {
>               tes = it.next();
>             System.out.println(tes + " a "  + item.get(tes) + "Euro");
>         }
>     }
>
>     public Shop4(String fname) {
>         item = new Hashtable<String,Integer>();
>               FileReader fr;
>               try {
>                   fr = new FileReader(fname);
>               } catch (FileNotFoundException e) {
>                   System.out.println(fname + "not found");
>                   return;
>               }
>       
>               BufferedReader br = new BufferedReader(fr);
>               String line;
>       
>               try {
>                   while ((line = br.readLine()) != null) {
>                       String target = line;
>                       String[] splt = target.split("=");
>                       String key = splt[0];
>                       String val = splt[1];
>                        item.put(key,new Integer(val));
>                   }
>                   br.close();
>               } catch (IOException e) {
>                   e.printStackTrace();
>               }
>     }
>
>     public static void main(String[] args) {
>         Shop4 shop = new Shop4("item.txt");
>         shop.printAllNames();
>     }
> }
> #+END_SRC
>
> If I want to execute the given source code block I end up with an error 
> message
>
> org-babel-execute-src-block: Wrong type argument: characterp, "-cp ."
>
>
> I believe this is rather common due to some changes within emacs, but
> I can't find a way to get around this.
>
> Any idea?
>
>
> BTW. previous year it seems I created the lists by
>
> #+BEGIN_SRC text :tangle ./item1.txt
> potato=120
> bread=160
> milk=180
> #+END_SRC
>
> but this seems not to work anymore.... anyhow that would be a minor problem
>
>
> Thanks for looking into this.
>
> Torsten
>

-- 
Eric Schulte
http://cs.unm.edu/~eschulte