Question

我试图从文本文件中读取点和X网格，并将它们添加到数组中并将它们打印为一个大网格。出于某种原因，它以阵列的形式打印阵列的部分，在控制台的这些块之间有大的空间。如果我使用toString它打印内存位置，所以我不知道这里发生了什么...

代码：

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Arrays;
import java.util.Scanner;

public class Project4 {

    public static void main(String[] args) throws IOException {
        Scanner input = new Scanner(System.in); // Created a scanner
        System.out.println("Enter the file name you would like to use");
        File file = new File(input.nextLine()); // Takes file name to find file
        Scanner inputFromFile = new Scanner(file);
        String line = inputFromFile.nextLine();
        FileInputStream fileInput = new FileInputStream(file); // reads file
        int r;
        while ((r = fileInput.read()) != -1) { // goes through each character in
                                                // file, char by char
            char c = (char) r;
            for (int i = 0; i <= 4; i++) {
                for (int y = 0; y <= 3; y++) {
                    GameOfLife.grid[i][y] = c;
                    for (int j = 0; j < GameOfLife.grid.length; j++)
                        System.out.println(GameOfLife.grid[j]);
                }
            }
        }

    }
}

GameOfLife：

import java.util.Arrays; 

public class GameOfLife {

static final int m = 25; // number of rows
static final int n = 75; // number of columns 
static char[][] grid = new char [m][n]; // Creates an empty (no dots or X's)grid of rows and columns. 


}

Answer 1

尝试在while循环之外打印数组的内容。您正在做的是在每个字符添加到网格后打印网格的所有内容

Answer 2

您正在每个角色后打印网格。

您需要以下内容：

    // Walk the whole grid.
    for (int i = 0; i <= 4; i++) {
        for (int y = 0; y <= 3; y++) {
            // Read a character from the file.
            int r = fileInput.read();
            if (r != -1) {
                GameOfLife.grid[i][y] = (char) r;
            } else {
                // End of file before grid filled!!! TODO! Deal with this.
            }
        }
    }
    // Print out the results.
    for (int j = 0; j < GameOfLife.grid.length; j++) {
        System.out.println(GameOfLife.grid[j]);
    }

阵列打印出大空间？

2 个答案: