＆＃34; main＆＃34;的异常错误java.util.NoSuchElementException

Question

我有以下两个类，我想要做的是尝试运行APP类，以便它可以采取命令行参数，而不是在代码中有一个固定的文件名

当我执行代码时，出现以下错误：

  

C：\ JavaTest＆gt; java ReadFileTestApp Resume.doc线程中的异常＆＃34; main＆＃34; java.util.Scanner.throwFor（未知源）的java.util.NoSuchElementException位于ReadFileTestApp.main的ReadFile.getFile（ReadFile.java:26）java.util.Scanner.next（未知源）（ReadFileTestApp.java:8 ）

import java.io.File;
import java.util.Scanner;
import java.io.FileNotFoundException;

public class ReadFile {

      private String fileName = "";
      private long maxSize = 102400;

      ReadFile(){};

      ReadFile(String fileName, Long maxSize) {
            this.fileName = fileName;
            this.maxSize = maxSize;
      }

      public String getFile() throws FileNotFoundException {
           File file = new File(this.fileName);
           if (file.exists()) {
                  double fileSize = file.length();
                  if (fileSize > this.maxSize) {
                       return "File is larger than max size";
                  } else if (fileSize == 0) {
                       return "File is empty";
                  } else {
                      String fileContents =  new Scanner(file).useDelimiter("\\Z").next();
                      return fileContents;
           }
           }else {
                return "File not Found!";
           }
      }
}


import java.io.FileNotFoundException;

public class ReadFileTestApp extends ReadFile
{     
       public static void main(String [] args) throws FileNotFoundException {

              ReadFile rf = new ReadFile(args[0], (long) 102400);
              System.out.println(rf.getFile());
       }

}