Java: createUser 构造函数创建文件失败？

Question

我刚刚学会了创建和读取文件，我正在通过制作一个小程序来练习它。问题是我的构造函数无法创建我需要的文件。

这是我的主要内容：

  public static void main(String[] args) {

    createUser user = new createUser("username", "password");  

    }

这是我的 class:

public class createUser {

private Formatter formatter;
private Scanner scanner;
private File file;
private String username;
private String password;

createUser(String username, String password){
    this.username = username;
    this.password = password;
try{
    String path = "D:\Users\" + this.username +".txt";
    file = new File(path);
    formatter = new Formatter(path);                    
    scanner = new Scanner(new File(path));
    formatter.format("Username: %s\n", username);
    formatter.format("Password: %s\n", password);
    formatter.close();
    System.out.printf("%s has been created!", this.username);
}
catch(Exception e){
    System.out.println("Failed to create the account!");
}

}

}

输出： 创建账号失败！

Answer 1

原来我必须手动创建 Users 文件夹。

Java: createUser 构造函数创建文件失败？

Java: createUser Constructor fails to create a file?

java

file

createfile