我如何得到一个文件的字符到Ja​​va中的二维数组？ [英] How do i get characters in a file into a 2D array in Java?

问题描述

所以我有一个看起来像这样的文件：

  +  -  +  -  +  -  +（/ N）
| S | | （/ N）
+ + + +（/ N）
| | E | （/ N）
+  -  +  -  +  -  +（/ N）
 

/ N 是文件中的新行

和我想在这里有每个字符作为一个5×7阵列的条目。我不知道该怎么做，这是我曾尝试（有很多其他的事情一起输入的文件）：

 公共静态无效的主要（字串[] args）抛出FileNotFoundException异常{  扫描仪输入=新的扫描仪（新的文件（maze0.txt））;  炭迷宫[] [] =新的char [5] [7];
  INT charCount = 0;
     对于（INT行= 0;＆行LT; finalHeight;排++）{
        对于（INT COL = 0;＆山坳下，finalWidth;西++）{
           而（input.hasNextLine（））{
               串行= input.nextLine（）;
              如果（（行＆LT; finalHeight  -  1 ||山坳＆LT; finalWidth）及和放大器; charCount＆LT; line.length（））{
                     迷宫[行] [山口] = line.charAt（charCount）;
                     charCount + = 1;
                     System.out.print（迷宫[行] [COL]）;
 

但这种打印出+ S + +这是不正确的。我是一个全新的初学编程的，并有一个很难与此，感谢您可以提供任何帮助。

我固定它！这是我做过什么：

 扫描仪输入=新的扫描仪（新文件（maze0.txt））;
  炭迷宫[] [] =新的char [5] [7];
  input.nextLine（）;
     对于（INT行= 0;排小于5;排++）{
        串fileLine = input.nextLine（）;
        对于（INT COL = 0;山坳7;;西++）{
              焦炭nextChar = fileLine.charAt（COL）;
              迷宫[行] [山口] = nextChar;
              System.out.print（迷宫[行] [COL]）;
 

解决方案

 进口java.io. *;
进口的java.util。*;大众B级
{
    公共静态无效的主要（字符串... aaadf）抛出FileNotFoundException异常
    {        扫描仪SC =新的扫描仪（新File（D：//maze.txt））;
        炭迷宫[] [] =新的char [5] [7];
        串线= NULL;
        的for（int i = 0;我小于5;我++）
        {
              行= sc.nextLine（）;
              为（中间体J = 0; J＆下; 7; J ++）
              {
                  迷宫[I] [J] = line.charAt（J）;
              }
        }
        的for（int i = 0;我小于5;我++）
        {              为（中间体J = 0; J＆下; 7; J ++）
              {
                  System.out.print（迷宫[I] [J]）;
              }
              的System.out.println（）;
        }
    }
}
 

So i have a file that looks like this:

+-+-+-+ ("/n")
|S|   | ("/n")
+ + + + ("/n")
|   |E| ("/n")
+-+-+-+ ("/n")

/n being a new line in the file

and i want to have each character here as an entry in a 5x7 array. I do not know how to do it, this is what i have tried (along with a lot of other things. input is the file):

public static void main(String[] args) throws FileNotFoundException {

  Scanner input = new Scanner(new File("maze0.txt"));

  char maze[][] = new char[5][7];
  int charCount = 0;
     for (int row = 0; row < finalHeight; row++) {
        for (int col = 0; col < finalWidth; col++) {
           while (input.hasNextLine()){
               String line = input.nextLine();
              if ((row < finalHeight - 1 || col < finalWidth) && charCount < line.length()) {
                     maze[row][col] = line.charAt(charCount);
                     charCount += 1;
                     System.out.print(maze[row][col]);

But this prints out +S+ + which is not right. I am a brand new beginner programmer and having a hard time with this, thanks for any help you can offer.

I fixed it!! this is what I did:

  Scanner input = new Scanner(new File("maze0.txt"));




  char maze[][] = new char[5][7];
  input.nextLine();
     for (int row = 0; row < 5; row++) {
        String fileLine = input.nextLine();
        for (int col = 0; col < 7; col++) {
              char nextChar = fileLine.charAt(col);
              maze[row][col] = nextChar;
              System.out.print(maze[row][col]);

解决方案

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

public class B 
{
    public static void main(String...aaadf)throws FileNotFoundException
    {

        Scanner sc = new Scanner(new File("D://maze.txt"));
        char maze[][] = new char[5][7];
        String line = null;
        for(int i = 0; i< 5;i++)
        {
              line = sc.nextLine();
              for(int j = 0; j < 7; j++)
              {
                  maze[i][j] = line.charAt(j);
              }
        }
        for(int i = 0; i< 5;i++)
        {

              for(int j = 0; j < 7; j++)
              {
                  System.out.print(maze[i][j]);
              }
              System.out.println();
        }
    }
}

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