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Thread: Creating variables from a text file

  1. #1
    Junior Member
    Join Date
    Oct 2009
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    Question Creating variables from a text file

    public class Main {

    public static void main(String[] args) throws FileNotFoundException {
    double score;
    String line;
    String fname;
    String lname;

    String filename = JOptionPane.showInputDialog("Filename: ");

    FileInputStream input_file = new FileInputStream(filename);
    Scanner input = new Scanner(input_file);

    while (input.hasNextLine()) {
    line = input.nextLine();

    Scanner is reading a text file that is formatted like this:
    Bob Smith 99.0
    John Doe 89.5
    Douglas Adams 42.0

    The program as is works when I enter the name of a txt file that's in the root directory.

    However, I'm supposed to use printf(); to get the first/last names and scores to line up.
    In order to do this I'm guessing (probably wrong) that I need to create 2 string variables for first and last names and 1 double variable for the scores.

    I can't figure out how to do this.
    Is there a way I can use scanner.next.. to separate each line in the text file into individual strings/doubles?

    Thanks in advance.

  2. #2
    Super Moderator helloworld922's Avatar
    Join Date
    Jun 2009
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    Default Re: Creating variables from a text file


    String firstName = input.next();
    String lastName = input.next();
    double score = input.nextDouble();

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