I've this scenario where one software(older) uses port 8080. I'm trying to install another software of newer version where I would like it to use port 8080. So if I stop the service of the older version, but without uninstalling it, would I be able to assign 8080 to the newer software? Or do I need to take other actions?
Short answer: No, you won't have to take further actions after the previous/old service is stopped. There is no need to deinstall it or force other things on it, given that the operating system terminates the process of that software correctly.
Just make sure it stays stopped, especially if the machine is rebooted.
Hope it helps.