Question

为什么我的BufferedReader不起作用？我正在尝试使用BufferedReader读取文本文件，但是每次运行该程序时，它都会在我的行中显示错误：

BufferedReader br = new BufferedReader(new FileReader("playerinfo.txt"));

我仍在学习，而且我不知道BufferedReader出了什么问题。我正在尝试使其读取玩家统计信息的文本文件，然后输出该文件。我做了一个文本文件以进行读取，但是每次尝试运行程序时仍然会出现错误。我试图查找与我类似的问题，但是似乎有几种方法可以执行BufferedReader，我认为我的方法看起来应该可以工作。我在代码中找不到其他任何看似错误的部分，但我还是很新。非常感谢您对此问题的任何帮助。

这是我尝试实施的方法：

import java.util.*;
import java.io.*;

class Player { //Base class
    String name;
    float weight;
    int age;

    Player() {
    }

    ;

    Player(String name, float weight, int age) {
        this.name = name;
        this.weight = weight;
        this.age = age;
    }
}

class Defensive extends Player {
    int tackles, interceptions;
    float sacks;

    Defensive() {
        super();
    }

    Defensive(String name, float weight, int age, int tackles, int interceptions, float sacks) {
        super(name, weight, age);
        this.tackles = tackles;
        this.interceptions = interceptions;
        this.sacks = sacks;
    }

    public String toString() {
        return "name : " + name + ", weight : " + weight + ", age : " + age + ", tackles : " + tackles + ", sacks : " + sacks + ", interceptions : " + interceptions + "\n";
    }
}

class Football { //main class
    public Defensive readDefensive(BufferedReader br) throws IOException {
        String name = br.readLine();
        float weight = Float.parseFloat(br.readLine());
        int age = Integer.parseInt(br.readLine());
        int tackles = Integer.parseInt(br.readLine());
        float sacks = Float.parseFloat(br.readLine());
        int interceptions = Integer.parseInt(br.readLine());
        return (new Defensive(name, weight, age, tackles, interceptions, sacks));
    }

    public static void main(String[] args) throws IOException {
        Football football = new Football();
        BufferedReader br = new BufferedReader(new FileReader("playerinfo.txt"));
        String line = br.readLine();
        Defensive defensive = new Defensive();
        ArrayList al = new ArrayList();
        while (line != null) {
            if (line.equals("defensive")) {
                defensive = football.readDefensive(br);
                al.add(defensive);
            }
            line = br.readLine();
        }
        System.out.println(al);
    }
}

Answer 1

您的包含主方法的足球类应声明为public class。

此外，当实现立即产生警告时，您还应考虑使用泛型列表。使用List<Defensive> defensives = new ArrayList<>();

为什么我的BufferedReader在读取文本文件时不起作用？

1 个答案: