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Thread: Need help to setup matches in this knockout tournament

  1. #1
    Junior Member
    Join Date
    Apr 2022
    Thanked 0 Times in 0 Posts

    Default Need help to setup matches in this knockout tournament

    I'm currently working on a knock-out tournament

    Overall Requirements:
    -UserInput for 8 teams (teamName and playerNames) stored in a file (MY test is currently with 2 teams)
    -Setup for matches (who vs. who) stored in a file
    -Results of the matches with points to the team(s) stored in a file
    -Ranking so we know who is out/in of the tournament

    I need a method which takes a team from my ArrayList<Team> or file (teamData.txt) and put it against another team - BOTH chosen from the user
    e.g. with 8 teams (team1-team8)
    team1 vs. team5

    Afterwards saves the match data in a file

    I HAVE NO CLUE ON HOW MY APPROACH SHOULD BE IN THIS... Any inputs? Thanks in advance

    public class Main {
        public static void main(String[] args) {
                Tournament tournament = IO.input(2);
    import java.util.ArrayList;
    public class Tournament {
        private ArrayList<Team> teams;
        public Tournament() {
            this.teams = new ArrayList<Team>();
        public ArrayList<Team> getTeams() {
            return teams;
    import java.util.ArrayList;
    public class Team {
        private String name;
        private ArrayList<Player> players;
        public Team(String name) {
            this.name = name;
            this.players = new ArrayList<Player>();
        public String getName() {
            return name;
        public ArrayList<Player> getPlayers() {
            return players;

    public class Player {
        private String name;
        public Player(String name) {
            this.name = name;
        public String getName() {
            return name;
    import java.io.FileWriter;
    import java.util.Scanner;
    public class IO {
        private static Scanner scan = new Scanner(System.in);
        public static int teamCount;
        private static String readUserInput(String msg) {
            return scan.nextLine();
        public static Tournament input(int numTeams) {
            Tournament tournament = new Tournament();
            for (int i = 0; i < numTeams; i++) {
                String teamName = readUserInput("Team name: ");
                Team team = new Team(teamName);
                int numPlayersPerTeam = Integer.parseInt(readUserInput("Hvor mange spillere er der p holdet?"));
                for (int j = 0; j < numPlayersPerTeam; j++) {
                    String playerName = readUserInput("Player name: ");
                    Player player = new Player(playerName);
            return tournament;
        public static void writeTeamFile(Tournament tournament) {
            FileWriter fileWriterDefault = new FileWriter("src/teamData.txt");
            fileWriterDefault.write("teamName, teamPlayers");
            } catch (Exception e) {
            for (Team team : tournament.getTeams()) {
                String fullPlayerNames = "";
                teamCount ++; //Later use to numMatches
                for (Player player : team.getPlayers()) {
                    String tmpPlayer = player.getName() + ", ";
                    fullPlayerNames = fullPlayerNames + tmpPlayer;
                try {
                    FileWriter fileWriter = new FileWriter("src/teamData.txt", true);
                    fileWriter.write("\n"+ team.getName() + ", " + fullPlayerNames);
                } catch (Exception e) {

    import java.io.BufferedReader;
    import java.io.FileNotFoundException;
    import java.io.FileReader;
    import java.io.IOException;
    public class FileIO {
        public static void readGameData() {
                String path = "src/teamData.txt";
                String teamNamesFile = "";
                    BufferedReader br = new BufferedReader(new FileReader(path));
                    br.readLine(); //Reads first line, so it skips the header
                    while((teamNamesFile = br.readLine()) != null){
                        String [] teamNames = teamNamesFile.split(",");
                        System.out.println("Team fra fil :" + teamNames[0]);
                } catch (FileNotFoundException e) {
                } catch (IOException e) {

    teamData.txt under here:
    teamName, teamPlayers
    teamA, A1, A2, A3, A4,
    teamB, B1, B2, B3, B4

    public class Match {
        public static void Match() {

  2. #2
    Join Date
    Jun 2022
    Thanked 3 Times in 2 Posts

    Default Re: Need help to setup matches in this knockout tournament

    This looks like a problem best solved with a binary tree

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