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Using a static method to read data from text file

David Barry
Ranch Hand

Joined: Jan 13, 2009
Posts: 83
I am need a little guidance here as to how I am to go about using a static method to read data from a text file. I know how to use a static method to write data to a text file, now I am wondering how to use a static method to read data from a text file. The following code is the code that read the data from the text file in the main method. Now that the code works in the main method, I am wondering how I can create a static method that does this. Thanks in advance to the person that has some ideas for me on this...

Ernest Friedman-Hill
author and iconoclast
Marshal

Joined: Jul 08, 2003
Posts: 24166
    
  30

Hi Dave,

What's the issue you're having? Why can't you just pop this code into a method?


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David Barry
Ranch Hand

Joined: Jan 13, 2009
Posts: 83
I'm really not sure how to go about doing this. Not really where to start or what to do. I know some about static methods, just not sure how to start here...
fred rosenberger
lowercase baba
Bartender

Joined: Oct 02, 2003
Posts: 10911
    
  12

you write a static method the same way you write any other method.. except you put 'static' in the signiature:

public static <return type> methodName()
{
//code goes here
}


There are only two hard things in computer science: cache invalidation, naming things, and off-by-one errors
Campbell Ritchie
Sheriff

Joined: Oct 13, 2005
Posts: 36478
    
  16
I have a little rule of thumb about static methods:
  • Does the method take or use any information from the state of an object of its class?
  • Does the method insert or alter any information into the state of an object of its class?
  • If you can confidently answer NO to both those questions, then you can make the method static.
  • Taking information from, or putting information into, anything passed as a parameter doesn't count. But passing a parameter of the same class probably constitutes cheating.

    I suggest you follow EFH's suggestion.

    Did I write a file-writing static method for you yesterday? Have a look at that; notice that static method takes information about the file, and what to write, as parameters. So it doesn't require any information from the state of an object of its class, nor does it alter anything about the state of any object of its class.
    David Barry
    Ranch Hand

    Joined: Jan 13, 2009
    Posts: 83
    Thanks everybody. I am working on it...
    Campbell Ritchie
    Sheriff

    Joined: Oct 13, 2005
    Posts: 36478
        
      16
    You're welcome

    Have you noticed the serious potential problem in your 1st posting yet?
     
    I agree. Here's the link: http://aspose.com/file-tools
     
    subject: Using a static method to read data from text file
     
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