/**
 * Piece position class
 */
public class PiecePosition {

    /**
     * Piece's X location
     */
    public int x;

    /**
     * Piece's Y location
     */
    public int y;

    /**
     * Conversion to the string
     * @return string representation
     */
    public String toString() {
        return String.valueOf((char) (x+97)) + (8-y);
    }

    /**
     * Parse PiecePosition from String
     * @param position parsed String
     * @return PiecePosition or null
     */
    public static PiecePosition fromString(String position) {
        try {
            int x = position.charAt(0) - 97;
            int y = 8 - Integer.parseInt(String.valueOf(position.charAt(1)));
            return new PiecePosition(x, y);
        } catch (Exception e) {
            return null;
        }
    }

    /**
     * PiecePosition constructor
     * @param x piece's X location
     * @param y piece's Y location
     */
    public PiecePosition(int x, int y) {
        this.x = x;
        this.y = y;
    }

}