文件读取错误：扫描程序的NoSuchElementException

Question

我对Java编程比较陌生。最近我决定创建一个随机系统，根据请求存储，写入和读取信息。在阅读我已经使用该程序编写的文件时，我收到以下错误：

Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Unknown Source)
at java.util.Scanner.next(Unknown Source)
at ReadFile.readFile(ReadFile.java:24)
at User.main(User.java:35)

我假设这个错误是User类调用ReadFile类的结果，因为到目前为止该程序的其余部分工作正常。

属于的用户类：

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

public class User 
{
@SuppressWarnings("resource")
public static void main(String[] args) throws IOException
{
    Scanner user_input = new Scanner(System.in);
    String input;
    System.out.println("User Information System:");
    System.out.println("Please type the full name of the person you wish to lookup.");
    input = user_input.nextLine();
    System.out.println("UIS currently has the following data on " + input + ":");

    if(input.equals("First Last"))
    {
        System.out.println("Opening Data on " + input + "...");
    }
    else
    {
        System.out.println("No Data found.");
    }
    if(input.equals("/create"))
    {
    CreateFile create = new CreateFile();
    create.openFile();
    create.addRecords();
    create.closeFile();
    }
    if(input.equals("/read"))
    {
    ReadFile read = new ReadFile();
    read.openFile();
    read.readFile();
    read.closeFile();
    }
  }
}

与ReadFile类一样：

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

public class ReadFile 
{
    static Scanner scanner;

    public void openFile()
    {
        try
        {
            scanner = new Scanner(new File("TestFile.txt"));
        }
        catch(Exception e)
        {
            System.out.println("Error reading file.");
        }
    }   
    public void readFile()
    {
        while(scanner.hasNext()) //Find a way to shorten this to a loop of printing whatever is in the file.
            {
            String a = scanner.nextLine();
            String b = scanner.next();
            String c = scanner.next();
            System.out.printf("%s %s %s\n", a,b,c);
            }
    }
    public void closeFile()
    {
        scanner.close();
    }
}