Java:从txt文件计算平均值的问题

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

public class AverageCalculator {
    public static void main(String[] args) {
        String fileName = "input.txt";
        double sum = 0;
        int count = 0;
        
        try (BufferedReader br = new BufferedReader(new FileReader(fileName))) {
            String line;
            while ((line = br.readLine()) != null) {
                double value = Double.parseDouble(line);
                sum += value;
                count++;
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        
        double average = sum / count;
        System.out.println("平均值：" + average);
    }
}