Question

I need to create an array of array with Strings in java…

For example, I read a file that contain for each column a sport and a player name..like:

The goal at the end it’s for populate a list grouped in section (sports)

hockey,Wayne Gretsky
hockey,Mario Lemieux
baseball,Barry Bonds
baseball,A Rod

I need to create the [][] with this function :

public static String[][] getSportItems(int sectionCount){
    String currentSection="";
    int cnt=0;
    try{

        File file = new File(Environment.getExternalStorageDirectory()
                + "/sports.csv");
        BufferedReader br = new BufferedReader(new FileReader(file));
        String strLine = "";
        while ((strLine = br.readLine()) != null) {
            String[] data = strLine.split(";");
            if(cnt>0){  

            }
            cnt++;
        }
    }catch (IOException e) {
        e.printStackTrace();
    }

}

How I can manage that to create an array for each sport that contain the players associated with the sports.

I’m new in Java… Thanks

Answer 1

Bonjour Maxime,

you should better store you data in a hasmap. This allows to associate some value to another.
For instance, you could define a map that associates a sport to a list of player like this :

Map<String, List<Player>> mapSportToPlayer = new Hashmap<String, List<Player>>();

or if you don’t have a Player class (but better have one) :

Map<String, List<String>> mapSportToPlayer = new Hashmap<String, List<String>>();

and to put a player, do like this

public void addPlayerToSport( String sport, Player player )
{
   List<Player> listPlayer = mapSportToPlayer.get( sport );
   //first time we associate a player to this sport
   if( listPlayer == null )
   {
       listPlayer = new ArrayList<Player>();
   }//if
   listPlayer.add( player );
}//met

and to get all people associated with a sport :

List listPlayer = mapSportToPlayer.get( sport );

and print them out on console

for( Player p : listPlayer )
   System.out.println( p );

and then override toString in class player to provide a clear text output of your objects.

Regards, Stéphane