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Thread: reading i n a text file

  1. #1
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    Default reading i n a text file

    i need some help with trying to read in a text file. the directions are:
    A line that starts with # is a comment line. Comment lines and empty lines should be ignored.
    Each course occupies one line. Each course has three fields: course code, course title, and prerequisites. Fields are separated by comma, and prerequisites are separated by white space(s). Note that some courses like CS120 do not have prerequisites.

    i cant get it to work at all , for some reason the splits dont work and i dont know how to make it read in 3 fields. This is the final part of my project thats due in 2 hours and ive been at trying to get it to work since last night . im stumped, ive done simple readin files but none this complicated.



     
    List<Courses> entries = new ArrayList<Courses>();
     
     
     
     
    		  BufferedReader br = null;
     
    		  try {
     
    		 String string;
    		 String[] array;
     
    		  br = new BufferedReader( new FileReader(
    		  getServletContext().getRealPath("/WEB-INF/undergrad_courses.txt")));
     
    		  while ((string = br.readLine()) != null) {
    			  if(string.startsWith("#")) {
    				  continue; 
    				  }
     
     
    		string.split(",").toString(); string.split(" "); entries.add(string");
     
    		  System.out.println(string); }
     
    		  } catch (IOException e) { e.printStackTrace(); } finally { try { if
    		  (br != null) br.close(); } catch (IOException ex) {
    		  ex.printStackTrace(); } }


  2. #2
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    Default Re: reading i n a text file

    One confusing thing I see in the code is that there are more than one statement on a line. That makes it harder to read and understand the code. There should only be one statement on a line.

    You need to read the API doc for the split() method. It returns an array with the separated parts of the String that was split. After calling split() the code needs to look in the array for the separate Strings.
    If you don't understand my answer, don't ignore it, ask a question.

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    Default Re: reading i n a text file

    Cross posted here.

    Cross posting is allowed, but please provide a link so that time isn't wasted giving the same or even conflicting information if a different direction is taken.

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