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  1. #1
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    Default Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

    File file = new File("lrt.txt");


    public ArrayList<Station> getAll() throws FileNotFoundException {
    ArrayList<Station> station = new ArrayList<>();
    Scanner input = new Scanner(file);
    try {
    while (input.hasNextLine()) {
    String id = input.nextLine();
    String name = input.nextLine();
    Station temp = new Station(id, name);
    station.add(temp);

    }
    } catch (Exception ex) {
    JOptionPane.showMessageDialog(null, ex);
    }
    Set newSet = new LinkedHashSet(station);
    station.clear();
    station.addAll(newSet);
    return station;
    }




    I dont know what wrong in the code >.< It cannot found the File lrt.txt
    Last edited by asdasdasdasdasd; 03-01-2014 at 11:02 AM.

  2. #2
    JosAH's Avatar
    JosAH is offline Moderator
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    Default Re: Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

    The full error message would've told you where things went wrong but you have hidden it by just displaying a dialog with the simple message of the exception. Change that line in your catch block to 'ex.printStackTrace()' and see what the stack trace has to say ...

    kind regards,

    Jos
    I have the stamina of a seal; I lie on the beach instead of running on it.

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