Task 3 - Creating simple console interface

Step 1

This method should perform the following actions:

• initialisation of private variable field which will be used as an internal model of the game,
• in loop:
  • printing the text representation of the game field to the output using method show(),
  • reading and processing user-entered input by using method handleInput(),
  • reaction on eventual changes of the game state (FAILED, SOLVED, etc.).

An example of implementation of the method play for game Minesweeper:

public void play(Field field) {
    this.field = field;
    do {
        show();
        handleInput();
    } while(field.getState() == GameState.PLAYING);

    show();

    if(field.getState() == GameState.SOLVED) {
        System.out.println("Solved!");
    } else if(field.getState() == GameState.FAILED){
        System.out.println("Failed!");
    }
}

Step 2

To display the game field on the standard output, the following requirements can be identified for the Minesweeper game:

• Lines are denoted by uppercase letters in ascending order (A, B, ..., I).
• Columns are denoted by numbers (0, 1, ... , 8).
• To depict an uncovered tile (OPEN) of type mine (Mine) we can use the X character.
• To depict a tile in state OPEN of type help (Clue), we use a number representing the tile value.
• To depict a marked tile (MARKED) we can use the M character.
• To depict an unmarked tile (CLOSED) we can use the - character.

In case of tiled games, we recommend proceeding similarly, i.e. to define the way the game field is represented (a two-dimensional array in a matrix, one-dimensional array printed horizontally or vertically, for card games the card layout according to players' positions or other game rules). The next step is to code individual tiles (or cards) by letters or special characters similarly to the Minesweeper game: M, -, and numbers for clues.

The data for displaying individual tiles can be retrieved from the game logic (in our example it's the instance of class Field).

public class Mine {
    @Override
    public String toString() {
        return "X";
    }
}

Step 3

In game Minesweeper the method handleInput() performs the following actions:

• Prints the request for entering the input, also showing the pattern of expected input format: X – end the game, MA1 – mark tile in row A and column 1, OB4 – open tile in row B and column 4.
• Loads the input from the user (nextLine()).
• Verifies the correctness of the input string using conditions and regular expressions.
• In case of user-entered input in an incorrect format, asks the user to enter the input again.
• Performs corresponding operation (marking a tile, opening a tile, ending the program) according to identified user action.

Step 4