Java中文件中的行数

import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;

public class FileLineCounter {
    public static void main(String[] args) {
        String filePath = "path/to/your/file.txt";
        int lineCount = 0;

        try (BufferedReader reader = new BufferedReader(new FileReader(filePath))) {
            String line;
            while ((line = reader.readLine()) != null) {
                lineCount++;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }

        System.out.println("行数: " + lineCount);
    }
}

import java.io.File;
import java.io.FileNotFoundException;
import java.util.Scanner;

public class FileLineCounter {
    public static void main(String[] args) {
        String filePath = "path/to/your/file.txt";
        int lineCount = 0;

        try (Scanner scanner = new Scanner(new File(filePath))) {
            while (scanner.hasNextLine()) {
                lineCount++;
                scanner.nextLine();
            }
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }

        System.out.println("行数: " + lineCount);
    }
}