2048/Board.java at master · alobrv/2048 · GitHub

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public class Board {

  private int[][] board;

  public Board() {
    board = new int[4][4];
    for (int i = 0; i < 4; i++) {
      for (int j = 0; j < 4; j++) {
        board[i][j] = 0;
      }
    }
  }

  public Board(int[][] board) {
    this.board = board;
  }

  public void draw() {
    System.out.println("┌────┬────┬────┬────┐");
    for (int i = 0; i < 4; i++) {
      for (int j = 0; j < 4; j++) {
        System.out.print("│");
        if (board[i][j] == 0) {
          System.out.print("    ");
        } else if (board[i][j] < 10) {
          System.out.print("  " + board[i][j] + " ");
        } else if (board[i][j] < 100) {
          System.out.print(" " + board[i][j] + " ");
        } else if (board[i][j] < 1000) {
          System.out.print(" " + board[i][j]);
        } else {
          System.out.print(board[i][j]);
        }
      }
      System.out.println("│");
      if (i != 3) {
        System.out.println("├────┼────┼────┼────┤");
      } else {
        System.out.println("└────┴────┴────┴────┘");
      }
    }
  }

  public void start() {
    for (int i = 0; i < 2; i++) {
      spawn();
    }
  }

  public void spawn() {
    boolean spawn = false;
    int i, j;
    if (!full()) {
      while (!spawn) {
        i = (int)(Math.random() * 4);
        j = (int)(Math.random() * 4);
        if (board[i][j] == 0) {
          board[i][j] = Math.random() < 0.9 ? 2 : 4;
          spawn = true;
        }
      }
    }
  }

  public void move(char c) {
    int aux;
    if (c == 'w') {
      for (int i = 1; i < 4; i++) {
        for (int j = 0; j < 4; j++) {
          aux = i;
          while (i > 0 && board[i-1][j] == 0) {
            board[i-1][j] = board[i][j];
            board[i][j] = 0;
            i--;
          }
          if (i > 0 && board[i-1][j] == board[i][j]) {
            board[i-1][j] = 2*board[i][j];
            board[i][j] = 0;
          }
          i = aux;
        }
      }
      spawn();
    } else if (c == 's') {
      for (int i = 2; i > -1; i--) {
        for (int j = 0; j < 4; j++) {
          aux = i;
          while (i < 3 && board[i+1][j] == 0) {
            board[i+1][j] = board[i][j];
            board[i][j] = 0;
            i++;
          }
          if (i < 3 && board[i+1][j] == board[i][j]) {
            board[i+1][j] = 2*board[i][j];
            board[i][j] = 0;
          }
          i = aux;
        }
      }
      spawn();
    } else if (c == 'a') {
      for (int j = 1; j < 4; j++){
        for (int i = 0; i < 4; i++) {
          aux = j;
          while (j > 0 && board[i][j-1] == 0) {
            board[i][j-1] = board[i][j];
            board[i][j] = 0;
            j--;
          }
          if (j > 0 && board[i][j-1] == board[i][j]) {
            board[i][j-1] = 2*board[i][j];
            board[i][j] = 0;
          }
          j = aux;
        }
      }
      spawn();
    } else if (c == 'd') {
      for (int j = 2; j > -1; j--) {
        for (int i = 0; i < 4; i++) {
          aux = j;
          while (j < 3 && board[i][j+1] == 0) {
            board[i][j+1] = board[i][j];
            board[i][j] = 0;
            j++;
          }
          if (j < 3 && board[i][j+1] == board[i][j]) {
            board[i][j+1] = 2*board[i][j];
            board[i][j] = 0;
          }
          j = aux;
        }
      }
      spawn();
    }
  }

  public boolean over() {
    boolean over = true;
    for (int i = 0; i < 4; i++) {
      for (int j = 0; j < 4; j++) {
        if (board[i][j] == 0) {
          over = false;
        }
        if (j != 3) {
          if (board[i][j] == board [i][j+1]) {
            over = false;
          }
        }
        if (i != 3) {
          if (board[i][j] == board [i+1][j]) {
            over = false;
          }
        }
      }
    }
    return over;
  }

  public boolean full() {
    boolean full = true;
    for (int i = 0; i < 4; i++) {
      for (int j = 0; j < 4; j++) {
        if (board[i][j] == 0) {
          full = false;
        }
      }
    }
    return full;
  }
}