The Game class

An instance of the Game class contains a Row holding the secret color values and also contains a Table. When there is a new guess, the Game instance stores the guess into the Table and also sets the number of positions and colors matching the secret row:

package packt.java189fundamentals.example.mastermind;

public class Game {

    final Table table;
    final private Row secretRow;
    boolean finished = false;
    final int nrOfColumns;

    public Game(Table table, Color[] secret) {
        this.table = table;
        this.secretRow = new Row(secret);
        this.nrOfColumns = secretRow.nrOfColumns();
    }

    public void addNewGuess(Row row) {
        if (isFinished()) {
            throw new IllegalArgumentException(
                "You can not guess on a finished game.");
        }
        final int positionMatch =
            secretRow.nrMatchingPositions...