java - 线程 "main"java.lang.NumberFormatException : For input string "F:/TextFiles/loginaccs.txt" 中的异常

Question

final String FileName = "F:/TextFiles/loginaccs.txt";
    InputStream FileNameIS = new ByteArrayInputStream(FileName.getBytes());
    try {
        BufferedReader file = new BufferedReader(new InputStreamReader(FileNameIS));
        int NoOfUsers = Integer.parseInt(file.readLine());
        String[][] Accounts = new String[NoOfUsers][2];
        for (int i=1; i>NoOfUsers; i++) {
            Accounts[i][1] = file.readLine();
            Accounts[i][2] = file.readLine();
        }
        for (int i=1; i>NoOfUsers; i++) {
            System.out.println(Accounts[i][1]);
            System.out.println(Accounts[i][2]);
        }
        file.close();

    } catch (IOException e) {
        System.out.println("ERROR: unable to read file.");
        e.printStackTrace();   
    }    

这是我的代码，试图从文本文件中读取一些数据，如下所示:(F:/TextFiles/loginaccs.txt")

4
Tom
123456
Mary
12345
Peter
1234
D3K
123

然后控制台说有某种异常。

Exception in thread "main" java.lang.NumberFormatException: For input string: "F:/TextFiles/loginaccs.txt"
at java.lang.NumberFormatException.forInputString(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at java.lang.Integer.parseInt(Unknown Source)
at com.RPGOfTheCorrupted.Program.Main.Login(Main.java:27)
at com.RPGOfTheCorrupted.Program.Main.main(Main.java:19)

我不知道为什么会这样，如果程序有任何问题，有人可以回答我吗？非常感谢。

Answer 1

您不是从 File 读取，您是从 String(代表文件名)读取:

BufferedReader file = new BufferedReader(new InputStreamReader(FileNameIS));

试试这个:

BufferedReader file = new BufferedReader(new InputStreamReader(new FileInputStream(FileName)));