如何从文本文件中获取字符并将其放入2D数组中？

Question

例如：

-8-88-8-8-8--8 

-8-8-8-8-8-8-8 

*-8-8-8-8--8-8 

8--8-8-8-8--8- 

Answer 1

1. 阅读文本文件一行一行
2. 分割字符串由-这样你才会有字符数组加上它在你的二维字符数组。

Answer 2

最简单的方法是使用String的toCharArray()方法。

所以，如果你正在使用一个BufferedReader

ArrayList<String> list = new ArrayList<String>(); 

    BufferedReader br = new BufferedReader(new FileReader("file")); 
    while ((thisLine = br.readLine()) != null) { 
    list.add(thisLine); 
    } 

    // finally convert the arraylist to a char[] 
    char[] firstDimension = new char[list.size()]; 
    for (int i = 0; i < list.length; i++) { 
     firstDimension[i] = list.get(i).toCharArray(); 
    } 

Answer 3

的char [] firsDimension不是2D。尝试类似，

try { 
     List<String> list = new ArrayList<String>(); 

     String thisLine = null; 
     BufferedReader br; 
     br = new BufferedReader(new FileReader("/path/to/file/yourfile.txt")); 

     while ((thisLine = br.readLine()) != null) { 
      list.add(thisLine); 
     } 

     char[][] firstDimension = new char[list.size()][]; 
     for (int i = 0; i < list.size(); i++) { 
      firstDimension[i] = list.get(i).toCharArray(); 
     } 

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

    } catch (Exception e) { 
     e.printStackTrace(); 
    } 

随着扫描器类

try { 
     Scanner scanner = new Scanner(new File(
       "/home/sinan/Desktop/yourfile.txt")); 
     scanner.useDelimiter(System.getProperty("line.separator")); 

     ArrayList<String> list = new ArrayList<String>(); 

     while (scanner.hasNext()) { 
      list.add(scanner.next()); 
     } 
     scanner.close(); 

     // finally convert the arraylist to a char[][] 
     char[][] firstDimension = new char[list.size()][]; 
     for (int i = 0; i < list.size(); i++) { 
      firstDimension[i] = list.get(i).toCharArray(); 
     } 

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

    } catch (FileNotFoundException e) { 
     e.printStackTrace(); 
    }