索引5超出长度5的界限

Question

我正在努力创造这个游戏https://en.wikipedia.org/wiki/Conway然而，每当我尝试使用printBoard方法时，我都会遇到以下错误

线程“main”java中出现异常。lang.ArrayIndexOutOfBoundsException:索引5超出长度5的界限。

我怎样才能解决这个问题？谢谢

public class Board {
    final int[][] board;
    final int width;
    final int height;

    public Board(int width, int height) {
        this.width = width;
        this.height = height;
        this.board = new int[width][height];
    }

    public void printBoard() {
        System.out.println("---");
        for (int i = 0; i < height; i++) {
            String line = "|";
            for (int j = 0; j < width; j++) {
                if (this.board[i][j] == 0) {
                    line += ".";
                } else {
                    line += "*";
                }
            }
            line += "|";
            System.out.println(line);
        }
        System.out.println("---\n");
    }

    public int countAliveNeighbours(int x, int y) {
        int count = 0;
        count+=this.board[x-1][y-1];
        count+=this.board[x][y-1];
        count+=this.board[x+1][y-1];
        count+=this.board[x+1][y];
        count+=this.board[x+1][y+1];
        count+=this.board[x][y+1];
        count+=this.board[x-1][y+1];
        count+=this.board[x-1][y];

        return count;
    }

    public void setAlive(int x, int y) {
        this.board[x][y] = 1;
    }

    public void setDead(int x, int y) {
        this.board[x][y] = 0;
    }

    public void setState(int x, int y) {
        if(this.board[x][y] == 1) {
            if(countAliveNeighbours(x,y) > 2) {
                setDead(x,y);
            } else if (countAliveNeighbours(x, y) == 2 || countAliveNeighbours(x, y) == 3) {
                setAlive(x,y);

            } else if (countAliveNeighbours(x,y) > 3) {
                setDead(x,y);
            }
        } else {
            if(countAliveNeighbours(x,y) == 3) {
                setAlive(x,y);
            }
        }

    }

    public void checkState() {
        for(int i=0;i<height;i++) {
            for(int j=0;j<width;j++) {
                setState(height, width);
            }
        }
    }

    public static void main(String[] args) {
        Board board = new Board(8,5);
        board.setAlive(2,2);
        board.setAlive(3,2);
        board.setAlive(4,2);

        board.printBoard();

    }
}

Answer 1

董事会初始化是必要的

 this.board = new int[width][height];

做到：-

 this.board = new int[height][width];

或者改变你用宽度迭代高度的循环。