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Thread: My program reads a file and must be read into 3 arrays, I've done that, but,

  1. #1
    Junior Member
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    Default My program reads a file and must be read into 3 arrays, I've done that, but,

    I've read the text file into 3 different arrays because the file data has to be separated according to the exercise stipulations. I'm now having an issue with retrieving it and formatting it into a table. I'm not sure where I'm making the mistakes.

    /* muTunes program processes a sampling of my music collection in
    * my library. The program reads the data into three arrays
    * (2 Strings for title and artist, and 1 integer for song length)
    * from my text file. The songs will be output in a formatted table,
    * table, indicating total of all songs, the longest song, the
    * shortest song, and the song titles in alphabetical order.
    import java.io.*;
    import java.util.*;

    public class muTunes {
    // Read file and call methods to proceed
    public static void main(String[] args) throws FileNotFoundException {
    Scanner fileScanner = new Scanner(new File("Music.txt"));


    public static void readSongs(Scanner fileScanner) {
    int numOfSongs = fileScanner.nextInt();
    while (fileScanner.hasNextLine()) {
    String songLine = fileScanner.nextLine();
    String delims = "[:]";
    int[] times = new int[10];
    String[] titles = new String[10];
    String[] artists = new String[10];
    String[] tokens = songLine.split(delims);
    for (int i = 0; i < tokens.length - 2; i++) {
    String songTimes = tokens[0];
    // System.out.print(tokens[i]+" "); //testing tokens
    // System.out.print(songTimes + " "); //testing songTimes
    times[i] = Integer.parseInt(songTimes);
    //System.out.print(times[i] + " "); // test contents of array
    for (int i = 1; i < tokens.length - 1; i++) {
    String songTitles = tokens[1];
    titles[i] = songTitles;
    //System.out.print(titles[i] + " "); // test contents of array
    for (int i = 2; i < tokens.length; i++) {
    String songArtists = tokens[2];
    artists[i] = songArtists;
    //System.out.print(artists[i] + " "); // test contents of array
    int totalTime = 0;
    for(int songSelect = 1; songSelect <= numOfSongs; songSelect++){
    totalTime += times[i];
    printTable(titles, artists, times);


    public static void printTable(String[] titles, String[] artists, int[] times){
    System.out.printf("%-5s%,24s%,24s\n%-5s%,24s%,24s\n", "TITLE", "ARTIST", "TIME", "-----", "------", "----");
    System.out.printf("%-5s%,24s%,24s\n", titles, artists, times);
    System.out.println("%-10s%48d\n", "TOTAL TIME", totalTime);

  2. #2
    Crazy Cat Lady KevinWorkman's Avatar
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    Default Re: My program reads a file and must be read into 3 arrays, I've done that, but,

    Please use the highlight tags when posting code. Also, code should be in the form of an SSCCE that demonstrates a single piece- in your case, outputting arrays as a table.

    What is the trouble? What does your code do that you don't want it to be doing? What does it not do that you do want it to do? what does it do instead?
    Useful links: How to Ask Questions the Smart Way | Use Code Tags | Java Tutorials
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