Search:

Take a moment from this question and do some of the posted reading. Once you see what is available, ask any questions you have left.
Good luck with the research

Surely a language like Java is well documented. What does your favorite search engine find?

I would suggest some reading from the String class and the Scanner class. Also get a specific idea of what will be changed. Keep the requirements in mind as you look the classes over and even take...

Are you are asking about how to edit the text files containing source code?