Help coderanch get a
new server
by contributing to the fundraiser
  • Post Reply Bookmark Topic Watch Topic
  • New Topic
programming forums Java Mobile Certification Databases Caching Books Engineering Micro Controllers OS Languages Paradigms IDEs Build Tools Frameworks Application Servers Open Source This Site Careers Other Pie Elite all forums
this forum made possible by our volunteer staff, including ...
Marshals:
  • Campbell Ritchie
  • Jeanne Boyarsky
  • Ron McLeod
  • Paul Clapham
  • Liutauras Vilda
Sheriffs:
  • paul wheaton
  • Rob Spoor
  • Devaka Cooray
Saloon Keepers:
  • Stephan van Hulst
  • Tim Holloway
  • Carey Brown
  • Frits Walraven
  • Tim Moores
Bartenders:
  • Mikalai Zaikin

Re-reading a file

 
Ranch Hand
Posts: 750
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Hi, I'm reading a file using...(try/catch blocks omitted for clarity)


Supposing I have read half the lines in a text file, and I want to start it again at the beginning, can I do this?
I tried bufRead.reset(), but it didn't work.

Thanks
 
Wanderer
Posts: 18671
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
No, you would really need to close the current reader and then open a new one.
 
colin shuker
Ranch Hand
Posts: 750
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Well, what I do is...

Each time I want to start reading from fresh, but that doesn't work.
It doesn't make sense
 
Jim Yingst
Wanderer
Posts: 18671
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Do you close the previous reader too? Sometimes that's important.

When "it doesn't work", what happens, exactly?

I note that in the code you've shown the variable line is never declared. Perhaps you should show that, because right now that code doesn't look like it could read anything successfully, even before it's reset. What value does line have the first time you reach the while loop? I think when you removed the try/catch stuff, you may have removed other important details.
 
colin shuker
Ranch Hand
Posts: 750
  • Mark post as helpful
  • send pies
    Number of slices to send:
    Optional 'thank-you' note:
  • Quote
  • Report post to moderator
Thanks, I just assumed it wasn't that, but my line variable was static, and so after first read of file, it was coming out as null...

So it started the new read as null, I simply used line=""; to fix it.

Thanks
 
She's out of the country right now, toppling an unauthorized dictatorship. Please leave a message with this tiny ad:
We need your help - Coderanch server fundraiser
https://coderanch.com/t/782867/Coderanch-server-fundraiser
reply
    Bookmark Topic Watch Topic
  • New Topic