Java板数组问题

Question

我正在开发一个使用 ansi 代码创建战舰游戏的程序。 ansi 代码并不是什么大问题，因为我发现这些代码允许我覆盖打印行。我的计划是用它来将船只放置在已经绘制的板上。我的问题在于放置船只的数组(“0”)。似乎无法克服 nullpointerexception 错误。我觉得这是阻止我完成该计划的唯一因素。任何帮助将不胜感激。

我的程序的一部分如下。

坐标类:

public class Coordinate {
   public String piece;
   int row, col, type;
   public boolean select, empty, hit, ship;
   public String [][] shipPiece;

   public String section()
   {
       piece = "i";

       empty = true;
       select = false;
       hit = false;
       //ship = false;

       if (empty)
       {
           piece = "\033[33m0\033[0m";
       }
       else if(!empty)
       {
           //empty = true;
           ship = true;
           piece = "0";
       }
       else if(!hit && ship)
           piece = "\033[33m0\033[0m";

       return piece;
   }

   public String placeShip()
   {
       for(int x = 0; x<=10; x++)
       {
           for(int y = 0; y<=10; y++)
           {
               shipPiece[x][y] = piece;
           }
       }
       return piece;   
   }
}

玩家等级:

public class Player {

    private String name1, name2;
    //private ArrayList<Coordinate> moves;
    //private Coordinate move;
    private int playerNumber;
    Scanner in = new Scanner(System.in);
    Board bawd = new Board();
    Coordinate c = new Coordinate();
    Ship sh = new Ship();

    public Player(){}

    public void GetNames()
    {
        for(playerNumber = 1; playerNumber <= 2; playerNumber++)
        {
           System.out.print("Player " + playerNumber + ": ");
           name1 = in.nextLine();
           playerNumber++;
           System.out.print("Player " + playerNumber + ": ");
           name2 = in.nextLine();
           System.out.print("\033[2J");
        }
    }

    public void setShips()
    {
        bawd.singleP1View();
        sh.coordLoc();
        System.out.println("\033[2J");
        bawd.singleP2View();
        sh.coordLoc();
        System.out.println("\033[2J");
        game();
    }

    public void game()
    {
        bawd.p1turn();
        c.placeShip();
    }

}

Answer 1

shipPiece 数组未初始化。

改变

 public String [][] shipPiece;

到

 public String [][] shipPiece = new String [11][11];