计算字母出现 [英] Counting letter occurrence

问题描述

程序需要计算并显示指定的charector出现在文本文件中的次数。

目前总数为零。我不是，如果我应该使用不同的循环，我也尝试使用for循环。

  //保持用户输入并且
字符串fileName; //保存文件名
字符串; //在文件中搜索的字母
 int total = 0; //保存文件中的字符总数
 
 
 //从用户获取文件和字符的名称
 fileName = JOptionPane.showInputDialog（请输入文件名称：）; 
 letter = JOptionPane.showInputDialog（请输入包含在字符串中的字母）; 
 
 
 //打开文件读取
文件file = new File（fileName）; 
扫描仪输入文件=新扫描仪（文件）; //为文件读取声明新的扫描器对象
 
 
 //将累加器设置为零
 int count = 0; 
 
 if（inputFile.nextLine（）。equalsIgnoreCase（letter））{
 
 count ++; //添加字母出现
 
 total + = count; //将字母出现添加到总共
 
 $ / code $ / $ p 
 
解决方案
 
  BufferedReader reader = new BufferedReader（new FileReader（somefile.txt））; 
 int ch; 
 char charToSearch ='a'; 
 int counter = 0; （（ch = reader.read（））！= -1）{
 if（charToSearch ==（char）ch）{
 counter ++; 
} 
}; 
 reader.close（）; 
 
 System.out.println（counter）; 
  
这有什么帮助吗？
 
The program needs to count and display the number of times that the specified charector appears in the text file.

Currently turning up zero for the total. I'm not if I should be using a different loop, I've also tried using a 'for' loop. 
// Hold user input and sum
String fileName;    // Holds the name of the file
String letter;      // Letter to search for in the file
int total = 0;      // Holds the total number of characters in the file


// Get the name of the file and character from the user
fileName = JOptionPane.showInputDialog("Please enter the name of a file:");
letter = JOptionPane.showInputDialog("Please enter a letter contained in the string");


// Open the file for reading
File file = new File(fileName);         
Scanner inputFile = new Scanner(file);  // Declare new scanner object for file reading


// Set accumulator to zero
int count = 0;

if (inputFile.nextLine().equalsIgnoreCase(letter)) {                                

    count++;          // add letter occurrence

    total += count;   // add the letter occurrence to the total
}

解决方案
    BufferedReader reader = new BufferedReader(new FileReader("somefile.txt"));
    int ch;
    char charToSearch='a';
    int counter=0;
    while((ch=reader.read()) != -1) {
        if(charToSearch == (char)ch) {
            counter++;
        }
    };
    reader.close();

    System.out.println(counter);
Is this of any help?

                        
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