My java application use base64 encoding which puts a new line (\n) after every 76 character. I need to put this encoded string in a properties file and the newline breaks the functionality.
When I do a encodedString.replaceAll("\n", ""); things are working fine, but I just want to make sure that this is expected and I am not introducing a hidden issue.
Breaking a base64 encoded string into multiple lines has been necessary for many old programs that couldn't handle long lines. Programs written in Java can usually handle long lines since they don't need to do the memory management themselves. As long as your lines are shorter than 64 million characters there should be no problem.
And since you don't need the newlines, you shouldn't generate them at all, if possible.