public void initialplayer() {
		int nb_players = 0;
		while(true){
			try {
				System.out.println("How many players want to play ?");
				sc = new Scanner (System.in);
				nb_players = Integer.parseInt(sc.nextLine());
				if (nb_players < 1 || nb_players > 20) throw new NumberFormatException();
				break;
			} catch(NumberFormatException e) {
				System.out.println("You must indicate an int between 1 and 20 includes.");
			}
		}
		for (int i = 0; i < nb_players; i++ ) {
			System.out.println("What is the name of player " + (i+1) + " ?");
			sc = new Scanner (System.in);
			String name = sc.nextLine();
			this.players.add(new Player(name, i+1));
		}
	}