运行我的程序时导致服务器断开连接的原因是什么？

Question

我正在为 class 做一个项目，我需要创建一个像游戏战舰这样的棋盘。 我需要制作一个 8 x 8 板，其中有 1 艘五长船、1 艘四长船、2 艘三长船和 1 艘两长船。 然后我需要打印出来。 我有我需要的所有功能并且我的代码已经完成，但是当我按下运行时，它什么也不做，直到我收到消息“服务器已断开连接。按下运行重新连接。” 如果这意味着什么，我正在使用 CodeHS。

编辑：我发现错误可能是由我尝试调用 createBoard(); 的方式引起的。 在第 10 行。我不确定如何正确调用它（我是个初学者），因为每次我以我知道的方式尝试它时，我都会收到一条消息，告诉我我不能调用非static 上下文中的静态方法。 我什至不知道那是什么意思。

编辑 2：我已将所有方法更改为 static 方法，该程序执行与 CodeHS IDE 中相同的操作，并且在调试器中运行但不运行 Z78E6221F6393D1456681DB398F1。

这是程序：

    public class Battleship
{
    public static void main(String[] args)
    {
        new Battleship();
    }
    
    public Battleship()
    {
        createBoard();
    }
    
    public int[][] board = new int[8][8];
    
    public void createBoard()
    {
        //fill board with 0's
        for(int i = 0; i < board.length; i++)
        {
            for(int j = 0; j < board[i].length; j++)
            {
                board[i][j] = 0;
            }
        }
         
        //fix loops to exec the right amount of times (FIXED)
        int startX = (int) Math.random() * 8 + 1;
        int startY = (int) Math.random() * 8 + 1;
        // size 5 ship
        while(shipDirection(startX, startY, 5) == -1)
        {
            startX = (int) Math.random() * 8 + 1;
            startY = (int) Math.random() * 8 + 1;
        }
        if(shipDirection(startX, startY, 5) == 1)
        {
            for(int i = startX; i < startX + 5; i++)
            {
                board[startY][i] = 5;
            }
        }
        if(shipDirection(startX, startY, 5) == 2)
        {
            for(int i = startX; i > startX - 5; i--)
            {
                board[startY][i] = 5;
            }
        }
        if(shipDirection(startX, startY, 5) == 3)
        {
            for(int i = startY; i < startY + 5; i++)
            {
                board[i][startX] = 5;
            }
        }
        if(shipDirection(startX, startY, 5) == 4)
        {
            for(int i = startY; i > startY - 5; i--)
            {
                board[i][startX] = 5;
            }
        }
        
        //size 4 ship
        while(shipDirection(startX, startY, 4) == -1)
        {
            startX = (int) Math.random() * 8 + 1;
            startY = (int) Math.random() * 8 + 1;
        }
        if(shipDirection(startX, startY, 4) == 1)
        {
            for(int i = startX; i < startX + 4; i++)
            {
                board[startY][i] = 4;
            }
        }
        if(shipDirection(startX, startY, 4) == 2)
        {
            for(int i = startX; i > startX - 4; i--)
            {
                board[startY][i] = 4;
            }
        }
        if(shipDirection(startX, startY, 4) == 3)
        {
            for(int i = startY; i < startY + 4; i++)
            {
                board[i][startX] = 4;
            }
        }
        if(shipDirection(startX, startY, 4) == 4)
        {
            for(int i = startY; i > startY - 4; i--)
            {
                board[i][startX] = 4;
            }
        }
        
        //size 3 ship
        for(int j = 0; j < 2; j++)
        {
            while(shipDirection(startX, startY, 3) == -1)
            {
                startX = (int) Math.random() * 8 + 1;
                startY = (int) Math.random() * 8 + 1;
            }
            if(shipDirection(startX, startY, 3) == 1)
            {
                for(int i = startX; i < startX + 3; i++)
                {
                    board[startY][i] = 3;
                }
            }
            if(shipDirection(startX, startY, 3) == 2)
            {
                for(int i = startX; i > startX - 3; i--)
                {
                    board[startY][i] = 3;
                }
            }
            if(shipDirection(startX, startY, 3) == 3)
            {
                for(int i = startY; i < startY + 3; i++)
                {
                    board[i][startX] = 3;
                }
            }
            if(shipDirection(startX, startY, 3) == 4)
            {
                for(int i = startY; i > startY - 3; i--)
                {
                    board[i][startX] = 3;
                }
            }
        }
        
        //size 2 ship
        while(shipDirection(startX, startY, 2) == -1)
        {
            startX = (int) Math.random() * 8 + 1;
            startY = (int) Math.random() * 8 + 1;
        }
        if(shipDirection(startX, startY, 2) == 1)
        {
            for(int i = startX; i < startX + 2; i++)
            {
                board[startY][i] = 2;
            }
        }
        if(shipDirection(startX, startY, 2) == 2)
        {
            for(int i = startX; i > startX - 2; i--)
            {
                board[startY][i] = 2;
            }
        }
        if(shipDirection(startX, startY, 2) == 3)
        {
            for(int i = startY; i < startY + 2; i++)
            {
                board[i][startX] = 2;
            }
        }
        if(shipDirection(startX, startY, 2) == 4)
        {
            for(int i = startY; i > startY - 2; i--)
            {
                board[i][startX] = 2;
            }
        }
            
        //printing the board
        for(int i = 0; i < board.length; i++)
        {
            for(int j = 0; j < board[i].length; j++)
            {
                System.out.print(board[i][j]);
            }
                System.out.println("");
        }
    }
            
    //check for battleship intersection (FIXED)
    public int shipDirection(int x, int y, int size)
    {
        if(x + size <= 8)
        {
            for(int i = x; i < x + size; i++)
            {
                if(board[y][i] != 0)
                {
                    return -1;
                }
            }
            return 1;
        }
        else if(x - size >= 0)
        {
            for(int i = x; i > x - size; i--)
            {
                if(board[y][i] != 0)
                {
                    return -1;
                }
            }
            return 2;
        }
        else if(y + size <= 8)
        {
            for(int i = y; i < y + size; i++)
            {
                if(board[i][x] != 0)
                {
                    return -1;
                }
            }
            return 3;
        }
        else if(y - size >= 0)
        {
            for(int i = y; i > y - size; i--)
            {
                if(board[i][x] != 0)
                {
                    return -1;
                }
            }
            return 4;
        }
        else
        {
            return -1;
        }
    }
}