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Thread: Java StreamTokenizer help

  1. #1
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    Default Java StreamTokenizer help

    Hello im trying to get my head around a program and not getting anywhere. I need to access a external txt file that contains football score in the format below.

    leeds united : liverpool : 3 : 1
    manchester united : arsenal : 1 : 5


    I then need to display the values in the correct order like below;

    leeds united 3 Liverpool 1
    manchester united 1 arsenal 5

    Im trying to get it so i have each value seperate and i know if its a string or a int. can anyone help my code is below.
    import java.io.BufferedReader;
    import java.io.FileReader;
    import java.io.IOException;
    import java.io.Reader;
    import java.io.StreamTokenizer;
     
     
    public class temp {
     
      public static void main(String[] a) throws IOException {
          sumfile("C:\\Documents and Settings\\Nicky\\My Documents\\write.txt");
      }
     
      static void sumfile(String filename) throws IOException {
        Reader r = new BufferedReader(new FileReader(filename));
        StreamTokenizer stok = new StreamTokenizer(r);
        stok.parseNumbers();
        double sum = 0;
        stok.nextToken();
        while (stok.ttype != StreamTokenizer.TT_EOF) {
          if (stok.ttype == StreamTokenizer.TT_NUMBER)
            sum += stok.nval;
          else
            System.out.println(stok.sval);
          stok.nextToken();
        }
        System.out.println("The number of goals is " + sum);
      }
     
    }
    Last edited by helloworld922; October 20th, 2009 at 07:58 PM.


  2. #2
    Super Moderator Json's Avatar
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    Default Re: Java StreamTokenizer help

    I figured you might want to use the bufferedreader as it is and actually read each line and parse it as you go along.

    import java.io.BufferedReader;
    import java.io.FileReader;
    import java.util.ArrayList;
    import java.util.List;
     
    public class FilesTest1 {
     
        private static class Match {
     
            private String homeTeam;
     
            private int homeScore;
     
            private String awayTeam;
     
            private int awayScore;
     
            public String getHomeTeam() {
                return homeTeam;
            }
     
            public void setHomeTeam(String homeTeam) {
                this.homeTeam = homeTeam;
            }
     
            public int getHomeScore() {
                return homeScore;
            }
     
            public void setHomeScore(int homeScore) {
                this.homeScore = homeScore;
            }
     
            public String getAwayTeam() {
                return awayTeam;
            }
     
            public void setAwayTeam(String awayTeam) {
                this.awayTeam = awayTeam;
            }
     
            public int getAwayScore() {
                return awayScore;
            }
     
            public void setAwayScore(int awayScore) {
                this.awayScore = awayScore;
            }
     
            @Override
            public String toString() {
                final StringBuilder stringBuilder = new StringBuilder();
                stringBuilder.append(this.homeTeam);
                stringBuilder.append(" ");
                stringBuilder.append(this.homeScore);
                stringBuilder.append(" ");
                stringBuilder.append(this.awayTeam);
                stringBuilder.append(" ");
                stringBuilder.append(this.awayScore);
     
                return stringBuilder.toString();
            }
        }
     
        public static void main(String[] args) throws Exception {
            final List<Match> matches = new ArrayList<Match>();
     
            final BufferedReader bufferedReader = new BufferedReader(new FileReader("My/Path/To/Scores/File"));
     
            if (bufferedReader != null) {
                String line;
     
                while ((line = bufferedReader.readLine()) != null) {
                    final String[] split = line.split(":");
     
                    if (split.length >= 4) {
                        final Match match = new Match();
                        match.setHomeTeam(split[0].trim());
                        match.setAwayTeam(split[1].trim());
                        match.setHomeScore(Integer.parseInt(split[2].trim()));
                        match.setAwayScore(Integer.parseInt(split[3].trim()));
                        matches.add(match);
                    }
                }
     
                bufferedReader.close();
            }
     
            if (!matches.isEmpty()) {
                for (final Match match : matches) {
                    System.out.println(match.toString());
                }
            }
        }
    }

    Enjoy!

    // Json

  3. #3
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    Default Re: Java StreamTokenizer help

    Thanks for the help mate but it seems to be erroring on the part below due to the <> do you know why this would be. I thinks its down to java not supporting the symbols.

    public static void main(String[] args) throws Exception {
    final List<Match> matches = new ArrayList<Match>();


    Thanks

    Nick

  4. #4
    Super Moderator helloworld922's Avatar
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    Default Re: Java StreamTokenizer help

    Java does support those symbols, they're called generics. (since SE 4 or 5)

    I'm not sure what kind of error you're getting, it compiles perfectly fine for me.

  5. #5
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    Default Re: Java StreamTokenizer help

    Got it working thanks a lot much appreciated.