Question

我有一个简单的函数来读取文件，但是它只读取行，并且在读取每一行的内容之前，我希望它已经存在，所以我已经有了文件中行的总值。

    try {
        FileReader leitor = new FileReader("config.txt");
        //file to reade

        BufferedReader buffer = new BufferedReader(leitor, 2 * 1024 * 1024);
        String linha = buffer.readLine();
        while (linha != null) {
            //I want to do an "if" here to get the value of the last line of the file and save in a variable.


            System.out.print(linha + "\n");
            linha = buffer.readLine();
            Thread.sleep(1000);
        }
    } catch (FileNotFoundException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    } catch (
            IOException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    } catch (InterruptedException ex) {
        Logger.getLogger(Main.class.getName()).log(Level.SEVERE, null, ex);
    }

谢谢。

Answer 1

实施long count = buffer.lines().Count();时，我得到了文件的行数，但由于line = buffer.readLine();不再起作用，因此计数后它无法继续前进到下一行。

然后我在下面找到了解决方法

//get the path of file
Path path = Paths.get("./config.txt");
//count the lines number
int linesNumber = ((int) Files.lines(path).count());

如何计算Java中文件的行数？

1 个答案: