package projekt;

/**
 * State
 * Use: Board b = new Board(); b.change(); b.change();
 * @author toor
 */
public class Board {

    private BoardState current;

    public Board() {
        current = new FirstPlayer();
    }
// Exporting non-public type through public API
    public void setBoardState(BoardState s) {
        current = s;
    }

    public void change() {
        current.change(this);
    }
}

interface BoardState {

    public void change(Board board);// {
        //board.setBoardState(new FirstPlayer());
   // }
}

class FirstPlayer implements BoardState {

    @Override
    public void change(Board board) {
        board.setBoardState(new SecondPlayer());
    }
}

class SecondPlayer implements BoardState {

    @Override
    public void change(Board board) {
        board.setBoardState(new FirstPlayer());
    }
}