PCFormat Forum Archive

Hi all!

Gonna be straight here: I need help coding a program in Java that can encrypt or decrypt a file. I am using ASCII values as my form of encryption. It is too late to change that. Is it possible to parse a file to String?

Thanking you!

In what format do you currently have it?

cuz you can always go and google and read over here.

http://download.oracle.com/javase/1.4.2 ... Guide.html

allows you to encrypt directly from a file stream. Which is what I used to use. but it is quick and dirty.

Rajiv wrote: parse a file to String?

Byte array.

EDIT: Although the better method would be opening two file streams, and reading bits from the source stream, and encrypting it and writing it directly to the destination stream.

(As opposed to loading the whole thing into RAM ( ), encrypting, and writing the whole thing to a stream again)

Agree with Bladerunner I do... better to go through the file with a buffered stream than to read the whole file at once. What are you going to do if you get a file that is say... 300MB in size?

RuadRauFlessa wrote:Agree with Bladerunner I do... better to go through the file with a buffered stream than to read the whole file at once. What are you going to do if you get a file that is say... 300MB in size?

Nevermind 300MB, try 8GB+

I wrote a file splitter once to split some game ISOs.

Ooooh...
Yeah that can also be a problem.