java - 逐行而不是逐字阅读文件

Question

我正在尝试编写一些代码来扫描输入文件中的回文，但它从每个单词而不是每一行中获取字符串。一个例子是赛车会显示为 racecar= palindrome 或 too hot to hoot = palindrome 但相反它会 go too= not a palindrome, hot= not a palindrome 等。

这是我目前正在做的读取文件的操作

File inputFile = new File( "c:/temp/palindromes.txt" );
Scanner inputScanner = new Scanner( inputFile );
while (inputScanner.hasNext())
{
    dirtyString = inputScanner.next();

    String cleanString = dirtyString.replaceAll("[^a-zA-Z]+", "");

    int length  = cleanString.length();
    int i, begin, end, middle;

    begin  = 0;
    end    = length - 1;
    middle = (begin + end)/2;

    for (i = begin; i <= middle; i++) {
        if (cleanString.charAt(begin) == cleanString.charAt(end)) {
            begin++;
            end--;
        }
        else {
            break;
        }
    }
}

Answer 1

您需要进行以下更改

改变

while (inputScanner.hasNext()) // This will check the next token.

and 

dirtyString  = inputScanner.next(); // This will read the next token value.

到

while (inputScanner.hasNextLine()) // This will check the next line.

and dirtyString = inputScanner.nextLine(); // This will read the next line value.

inputScanner.next() 将读取下一个标记

inputScanner.nextLine() 将读取一行。