Re: file reader returning null when file is not null content

Lew <>
Sun, 02 May 2010 23:51:07 -0400
jason wrote:

i [sic] am using the java [sic] desktop application developer in NetBeans.

When I use the following program:

  * To change this template, choose Tools | Templates
  * and open the template in the editor.

package readtextfileexample;

  * @author amandaabdou

public class Main {

      * @param args the command line arguments
     public static void main(String[] args) {
String A;

You should follow the naming conventions.


     public static String FileReader(String args){
         File file = new File(args);
         StringBuffer contents = new StringBuffer();
         BufferedReader reader = null;
         String For_Output="";
             reader = new BufferedReader(new FileReader(file));
             String text = null;

             // repeat until all lines is read
             while ((text = reader.readLine()) != null)
         } catch (FileNotFoundException e)
         } catch (IOException e)
         } finally
                 if (reader != null)
             } catch (IOException e)

         // show file contents here

         return For_Output;


in a java [sic] application in netbeans [sic], it runs perfectly and does exactly
what i [sic] want.

Case matters in Java. It's good practice to use correct case in writing about
Java matters.

if i [sic] attempt to migrate the method of FileReader to my basic desktop
application it no longer works.
this desktop application is using the exact same library imports and
is using identical code aside from one aspect. my FileReader method is
now called:
private String FileReader(String args)

And that didn't give you a compiler error?

There is a significant difference between static and instance methods. But
since we don't get the whole picture, we can't tell exactly why you didn't get
a compiler error when the method changed from static to instance.

Either way, the method name should be spelled with an initial lower-case
letter, as with variables.

I also suspect that markspace is onto something with hi comments about the
"java [sic] desktop application developer".


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