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Thread: Reading from a file

  1. #1
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    Question Reading from a file

    I'm working on a project for class that reads a txt file of movie-titles, genres, and quantity into a dvd rental system. Using a GUI I have the user select the txt file to be read, check to make sure it's a txt file, and then send it to a constructor to parse information. I'm getting the error response "Bad file name".

    Here's the GUI code:
    public MyFlixGUI() throws MissingFileException {
    		JFileChooser fc = new JFileChooser();
    		fc.setFileSelectionMode(JFileChooser.FILES_AND_DIRECTORIES);
    		int returnVal = fc.showOpenDialog(this);
    		if (returnVal == JFileChooser.APPROVE_OPTION) {
    			File file = fc.getSelectedFile();
                            rentals = new DVDRentalSystem(file.getName()); 
    		}
    		else
    			throw new MissingFileException("No file selected.");    	
    	}

    Here's the constructor:
    public DVDRentalSystem(String filename){
    		inventory = new Linklist();
    		reserve = new Linklist();
    		athome = new Linklist();
    		try{
    			FileReader fr = new FileReader(filename);
    			BufferedReader input = new BufferedReader(fr);
    			String line = input.readLine();
    			while (line != null){
    				Scanner scan = new Scanner(line);
    				int inv = scan.nextInt();
    				String genre = scan.next();
    				String name = scan.nextLine();
    				addToInventory(new Film(name,genre,inv));
    				line = input.readLine();
    			}
    		}
    			catch (FileNotFoundException e) {
    				System.err.println("Bad file name");
    			}
    			catch (IOException e) {
    				System.err.println("Exception in reading from file"); 
    			}
     
    	}


  2. #2
    Administrator copeg's Avatar
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    Default Re: Reading from a file

    Take a look at the API for File...the getName() returns the name of the file, but you will need the full path. Look into using the getAbsolutePath() function.

  3. The Following User Says Thank You to copeg For This Useful Post:

    javapenguin (January 4th, 2011)

  4. #3
    mmm.. coffee JavaPF's Avatar
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    Default Re: Reading from a file

    If you don't get any further with the getAbsolutePath() function, please post something we can compile. Thanks
    Please use [highlight=Java] code [/highlight] tags when posting your code.
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