Question

我正在编写一个程序，用于计算每个字母字符（将小写字母转换为大写字母）出现在数据文件中的次数。

import java.io.*;
import java.util.*;
public class CharDistribution{

public static void main(String[] args) throws FileNotFoundException{
  File file = new File (args[0]);


  String[] letters = {"a","b","c","d","e","f","g","h","i","j","k","l","m","n","o","p","q","r","s","t","u","v","w","x","y","z"};
  int numbers[] = new int [26];

  Scanner input=new Scanner(file);
  input.useDelimiter("");

  while (input.hasNext()){
     String nextLetter = input.next().toUpperCase( );

     for (int i = 0; i <letters.length; i++);
     {
        String letter = letters[i].toUpperCase( );

        if (letters.equals(nextLetter)){
           numbers[i] = numbers[i] + 1;
        }

     }

     for (int i = 0; i <letters.length; i++);
     {
        System.out.println(letters[i].toUpperCase( ) + " - " + numbers[i]);

     }
  }
  }
  }

由于某种原因，程序无法找到我在for循环中使用的变量i。

我在循环后使用i的所有5次给我这个错误“找不到符号”。我已经看了十几次，似乎无法找到代码的错误。你看到我可能有什么问题吗？

Answer 1

for后面有一个分号，它会终止它，使下面的块与它无关，因此无法解析i。只需删除它，你就可以了：

for (int i = 0; i <letters.length; i++) // ; removed here
{

找不到符号可变的我

1 个答案: