title: Read Data From Text File And Sum Numbers
body: <p>I want to read in data from a text file which is full of integers and have the program print those integers out to the screen while summing them.  This shouldn't be hard, but I can't figure it out!!!</p>
  
  <p>Here is the extremely simplified text file:</p>
  
  <pre><code>1
  2
  3
  4
  5
  6
  7
  8
  9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  </code></pre>
  
  <p>And here is my code that is supposed to work:</p>
  
  <pre><code>import java.util.*;
  import java.io.File;
  import java.io.IOException;
  
  public class ReadFile
  {
      public static void main(String[] args)
      throws IOException
      {
          Scanner textfile = new Scanner(new File("Some_Numbers.txt"));
  
          filereader(textfile);
      }   
  
  
      static void filereader(Scanner textfile)
      {
          int i = 0;
          int sum = 0;
  
          while(i &lt;= 19)
          {
              System.out.println(textfile.nextInt());
              sum = sum + textfile.nextInt();
              i++;
          }
      }
  
  
  
  }
  </code></pre>
  
  <p>Finally, here is the output I get:</p>
  
  <pre><code>1
  3
  5
  7
  9
  11
  13
  15
  17
  19
  Exception in thread "main" java.util.NoSuchElementException
      at java.util.Scanner.throwFor(Scanner.java:838)
      at java.util.Scanner.next(Scanner.java:1461)
      at java.util.Scanner.nextInt(Scanner.java:2091)
      at java.util.Scanner.nextInt(Scanner.java:2050)
      at ReadFile.filereader(ReadFile.java:23)
      at ReadFile.main(ReadFile.java:12)
  </code></pre>