handling large text files...

[kanghao]

I have a large text file sized 1MB or over.

I have to modify just the first or second line and the remaing remains as the same.

I tried LineNumberReader and it works fine.
(read each line and the modify first or the second line
and append them to stringbuffer and toStringed it.)

but I'm wondering there is a better way.
and I want to know the rule of thumb of handling large text files in Java.

Thanks.

 

[kanghao]

and what about large Strings?

 

[sedj]

Use a BufferedReader or a BufferedInputStream ...

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Free Java/J2EE Database Connection Pooling Software

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[stefanwagner]

If you ask for a solution without reading the all the other lines: No.
Only if the numbers of characters doesn't change you may write to absolut positions in the files, without reading the entirely file.

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[Diancecht]

Maybe TandomAccessFile would help.

Cheers,
Dian

 

[stefanwagner]

TandomAccessFile

RandomAccessFoole was meant.

seeking a job as java-programmer in Berlin:

http://home.arcor.de/hirnstrom/bewerbung

 

[sedj]

--------------------------------------------------
Free Java/J2EE Database Connection Pooling Software

http://www.primrose.org.uk