/chess-system-java

Projeto: Sistema de jogo de Xadrez em Java, desenvolvido no curso "Java COMPLETO 2021 - Programação Orientada a Objetos + Projetos", administrado pelo professor Nélio Alves.

Primary LanguageJava

♟️ Chess System in Java

Como jogar 🎮

  1. Abra um terminal (Git Bash é o recomendado, pois é colorido)
  2. Entre no diretório /bin do projeto, no meu caso ~/eclipse-workspace/chess-system/bin
  3. Após entrar no diretório, digite Java application/Program para rodar a aplicação (obs: estou utilizando o Java SE 11)
  4. O resultado esperado será esse, conforme o 1° Tela Inicial exibe abaixo:
1° Tela Inicial 2° Selecione a peça origem (Source) 3° Selecione a peça destino (Target) 4° Peça movida, turno/player trocado
Screenshot_1 Screenshot_1 Screenshot_1 image
  1. Observações: 📝
  • Peças: Peão, Torre, Cavalo, Bispo, Rainha e Rei
Pawn(Peão) Rook(Torre) Knight(Cavalo) Bishop(Bispo) Queen(Rainha) King(Rei)
P R N B Q K
  • A mecânica do jogo é baseada em linhas(1, 2, 3, 4, 5, 6, 7, 8) e colunas(a, b, c, d, e, f, g, h)
  • Para escolher uma peça é necessário selecionar primeiramente a coluna e logo em seguida(sem espaços) selecionar a linha, exemplo: c2
  • Em Captured pieces o jogo armazena as peças capturadas.
  • O Turn exibe o turno(rodada) em que o jogo está.
  • Waiting player exibe qual é o jogador a jogar a próxima peça.
  • Source é a origem, ou seja, a peça no qual o jogador irá jogar.
  • Target é o destino, ou seja, o local no qual o jogador irá mover a peça.
  • O jogo possui sistema de Check e CheckMate
  • Alguns movimentos especiais:
    • Castling(Roque)
    • En Passant
    • Promotion(Promoção)

Conceitos 📌

First class: Position

Checklist:

  • Class Position [public]
  • OOP Topics:
    • Encapsulation
    • Constructors
    • ToString (Object/overriding)

Starting to implement Board and Piece

Checklist:

  • Classes Piece, Board [public]
  • OOP Topics:
    • Associations
    • Encapsulation / Access Modifiers
  • Data Structures Topics:
    • Matrix

Chess layer and printing the board

8 - - - - - - - -
7 - - - - - - - -
6 - - - - - - - -
5 - - - - - - - -
4 - - - - - - - -
3 - - - - - - - -
2 - - - - - - - -
1 - - - - - - - -
  a b c d e f g h

Checklist:

  • Methods: Board.Piece(row, column) and Board.Piece(position)
  • Enum Chess.Color
  • Class Chess.ChessPiece [public]
  • Class Chess.ChessMatch [public]
  • Class ChessConsole.UI
  • OOP Topics:
    • Enumerations
    • Encapsulation / Access Modifiers
    • Inheritance
    • Downcasting
    • Static members
    • Layers pattern
  • Data Structures Topics:
    • Matrix

Placing pieces on the board

Checklist:

  • Method: Board.PlacePiece(piece, position)
  • Classes: Rook, King [public]
  • Method: ChessMatch.InitialSetup
  • OOP Topics:
    • Inheritance
    • Overriding
    • Polymorphism (ToString)

BoardException and defensive programming

Checklist:

  • Class BoardException [public]
  • Methods: Board.PositionExists, Board.ThereIsAPiece
  • Implement defensive programming in Board methods
  • OOP Topics:
    • Exceptions
    • Constructors (a string must be informed to the exception)

ChessException and ChessPosition

Checklist:

  • Class ChessException [public]
  • Class ChessPosition [public]
  • Refactor ChessMatch.InitialSetup
  • OOP Topics:
    • Exceptions
    • Encapsulation
    • Constructors (a string must be informed to the exception)
    • Overriding
    • Static members
    • Layers pattern

Little improvement in board printing

Color in terminal:

  • Windows: Git Bash
  • Mac: Google "osx terminal color"

Checklist:

  • Place more pieces on the board
  • Distinguish piece colors in UI.PrintPiece method

Moving pieces

Checklist:

  • Method Board.RemovePiece
  • Method UI.ReadChessPosition
  • Method ChessMatch.PerformChessMove
    • Method ChessMatch.MakeMove
    • Method ChessMatch.ValidadeSourcePosition
  • Write basic logic on Program.cs
  • OOP Topics:
    • Exceptions
    • Encapsulation

Handling exceptions and clearing screen

Clear screen using Java:

// https://stackoverflow.com/questions/2979383/java-clear-the-console
public static void clearScreen() {
  System.out.print("\033[H\033[2J");
  System.out.flush();
}

Checklist:

  • ChessException
  • InputMismatchException

Possible moves of a piece

Screenshot_1

Checklist:

  • Methods in Piece:

    • PossibleMoves [abstract]
    • PossibleMove
    • IsThereAnyPossibleMove

  • Basic PossibleMove implementation for Rook and King

  • Update ChessMatch.ValidadeSourcePosition

  • OOP Topics:

    • Abstract method / class
    • Exceptions

Implementing possible moves of Rook

Checklist:

  • Method ChessPiece.IsThereOpponentPiece(position) [protected]
  • Implement Rook.PossibleMoves
  • Method ChessMatch.ValidateTargetPosition
  • OOP Topics:
    • Polymorphism
    • Encapsulation / access modifiers [protected]
    • Exceptions

Printing possible moves

Checklist:

  • Method ChessMatch.PossibleMoves
  • Method UI.PrintBoard [overload]
  • Refactor main program logic
  • OOP Topics:
    • Overloading

Implementing possible moves of King

Checklist:

  • Method King.CanMove(position) [private]
  • Implement King.PossibleMoves
  • OOP Topics:
    • Encapsulation
    • Polymorphism

Switching player each turn

Checklist:

  • Class ChessMatch:
    • Properties Turn, CurrentPlayer [private set]
    • Method NextTurn [private]
    • Update PerformChessMove
    • Update ValidadeSourcePosition
  • Method UI.PrintMatch
  • OOP Topics:
    • Encapsulation
    • Exceptions

Handling captured pieces

Checklist:

  • Method UI.PrintCapturedPieces
  • Update UI.PrintMatch
  • Update Program logic
  • Lists in ChessMatch: _piecesOnTheBoard, _capturedPieces
    • Update constructor
    • Update PlaceNewPiece
    • Update MakeMove
  • OOP Topics:
    • Encapsulation
    • Constructors
  • Data Structures Topics:
    • List

Check logic

Rules:

  • Check means your king is under threat by at least one opponent piece
  • You can't put yourself in check

Checklist:

  • Property ChessPiece.ChessPosition [get]
  • Class ChessMatch:
    • Method UndoMove
    • Property Check [private set]
    • Method Opponent [private]
    • Method King(color) [private]
    • Method TestCheck
    • Update PerformChessMove
  • Update UI.PrintMatch

Checkmate logic

Checklist:

  • Class ChessMatch:
    • Property Checkmate [private set]
    • Method TestCheckmate [private]
    • Update PerformChessMove
  • Update UI.PrintMatch
  • Update Program logic

Piece move count

Checklist:

  • Class ChessPiece:
    • Property MoveCount [private set]
    • Method IncreaseMoveCount [internal]
    • Method DecreaseMoveCount [internal]
  • Class ChessMatch:
    • Update MakeMove
    • Update UndoMove
  • OOP Topics:
    • Encapsulation

Pawn

Checklist:

  • Class Pawn
  • Update ChessMatch.InitialSetup
  • OOP Topics:
    • Encapsulation
    • Inheritance
    • Polymorphism

Bishop

Checklist:

  • Class Bishop
  • Update ChessMatch.InitialSetup
  • OOP Topics:
    • Encapsulation
    • Inheritance
    • Polymorphism

Knight

Checklist:

  • Class Knight
  • Update ChessMatch.InitialSetup
  • OOP Topics:
    • Encapsulation
    • Inheritance
    • Polymorphism

Queen

Checklist:

  • Class Queen
  • Update ChessMatch.InitialSetup
  • OOP Topics:
    • Encapsulation
    • Inheritance
    • Polymorphism

Special move - Castling

Screenshot_1

Checklist:

  • Update King
  • Update ChessMatch.MakeMove
  • Update ChessMatch.UndoMove

Special move - En Passant

Screenshot_1

Checklist:

  • Register a pawn which can be captured by en passant on next turn
    • Property ChessMatch.EnPassantVulnerable
    • Update ChessMatch.PerformChessMove
  • Update Pawn.PossibleMoves
  • Update ChessMatch.MakeMove
  • Update ChessMatch.UndoMove
  • Update ChessMatch.InitialSetup

Special move - Promotion

Screenshot_1

Checklist:

  • Property ChessMatch.Promoted
  • Update ChessMatch.PerformChessMove
  • Method ChessMatch.ReplacePromotedPiece
  • Update Program logic