Editing a text file

I'm trying to make a program that edits the text from a file and saves the text with a different name. I know how to copy the file with a different name, but I don't know how to alter the text inside it.

Lets say I have a file called MyTextFile.txt with the content "abcd". I want the program to create a file called MyTextFileModified.txt with the content "bcde"

Also, I'd like it to work for long files, and maybe for word files.

Quote:

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Originally Posted by alexix

Lets say I have a file called MyTextFile.txt with the content "abcd". I want the program to create a file called MyTextFileModified.txt with the content "bcde"

Also, I'd like it to work for long files, and maybe for word files.

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So, do you want it to change it to 'bcde' every time or do you want it to be something that you decide upon?
What is a long file?
What is a word file?

You can always read line by line using a BufferedReader + FileReader and get the content of a .txt-file. If you know how to work with files I'm sure you'll be able to do this.
If you want to read MS Word documents, have a look at the POI API - Apache POI - the Java API for Microsoft Documents