打印格式不正确

Question

所以我创建了一个用户名密码数据库，将其写入文件中：

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

public class createfile {

private Formatter x;

public void openFile(){
    try{
        x = new Formatter("okey.fil");

    }
    catch(Exception e){
        System.out.println("error get it right");
    }
}
public void addRecords(){
    Scanner input = new Scanner(System.in);
    System.out.println("Enter number of records");
    int num = input.nextInt();
    for(int counter = 1; counter<=num; counter++){
        String username = input.nextLine();
        String email = input.nextLine();
        String userpass = input.nextLine();
        String emailpass = input.nextLine();
        x.format("%s%s%s%s%s%s%s%s", username,"\t", email,"\t", userpass,"\t", emailpass, "\n");

    }

}
public void closeFile(){
    x.close();
}
}

public class Main {

public static void main(String[] args) {
    createfile f = new createfile();
    f.openFile();
    f.addRecords();
    f.closeFile();
    }
}

问题是，它以错误的格式输出错误： 我将使用2作为记录数（num = 2） 并且字符串将与它所要求的相同（username = username，emailpass = emailpass ...） 这是输出：

        username        email   userpass
emailpass       username2       email2  userpass2