Writing characters

   public void characters(char characters[], int start, int length)
   {
      String chData = (new String(characters, start, length)).trim();
      if(chData.indexOf("\n") < 0 && chData.length() > 0) {
         if(gi >= 0){
            grades[nstudent-1][gi] = Integer.parseInt(chData);
         }
      }
   }