java - 康威生活游戏中的项目不匹配异常

Question

我正在为类编写康威生命游戏程序。下面的方法读取指定的输入文件，将其读入一个 int 数组，然后返回该数组。

import java.util.*;
import java.io.*;

public class Proj5 {
public static void main(String[] args) throws IOException   {
//the main method controls the flow of the program
    String filename = args[0];
    int[][] cells = readBoard(filename);

    for (int i = 0; i < cells.length; i++)  {
        for (int j = 0; j < cells[i].length; j++)   {
            System.out.print(cells[i][j]);
        }
        System.out.println("");
    }

}

public static int[][] readBoard(String filename) throws IOException {
// This method reads the specified input file, reads it into an int[][] array, and returns that array.
    Scanner inFile = new Scanner(new File(filename));
    int row = Integer.parseInt(inFile.nextLine());
    int col = Integer.parseInt(inFile.nextLine());

    int[][] cells = new int[row][col];

    inFile.nextLine();
    for (int i = 0; i < row; i++)   {
        for (int j = 0; j < col; j++)   {
            cells[i][j] = inFile.nextInt();
        }
        inFile.nextLine();
    }

    inFile.close();
    return cells;
}

扫描仪读取的文本文件格式如下。其中第一行是行数，第二行是列数，其余是需要放入数组的数据:

25
77
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000001110000000000000000000000000000000000000000000000000000000
00000000000000001110001110000000000000000000000000111110000000000000000000000
00000000000000111100000111100000000000000000001111100011111000000000000000000
00000000000000001110001110000000000000000000000000111110000000000000000000000
00000000000000000001110000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000001110000000000000000000000000000000000000000000000000000000
00000000000000001110001110000000000000000000000000111110000000000000000000000
00000000000000111100000111100000000000000000001111100011111000000000000000000
00000000000000001110001110000000000000000000000000111110000000000000000000000
00000000000000000001110000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000
00000000000000000000000000000000000000000000000000000000000000000000000000000

但是，当我运行我的程序时......我得到:

线程“main”中的异常 java.util.InputMismatchException:对于输入字符串:“000000000000000000011100000000000000000000000000000000000000000000000000000000”在 java.util.Scanner.nextInt(未知来源)

在 java.util.Scanner.nextInt(未知来源)

在 Proj5.readBoard(Proj5.java:30)

在 Proj5.main(Proj5.java:8)

而且我不完全确定为什么或如何修复它...

Answer 1

使用 nextInt() 将尝试将每个文件行转换为单个整数。

抛出异常是因为整行被视为单个数字，不适合 int 值。

我要继续解决这个问题的方法是每行使用一个 readLine 调用来消耗整行输入。然后使用 String 的 charAt 方法检查该行特定列的字符。如有必要，可以通过减去 '0' 的值将其有效地转换为 int。