Java is a compiled language and everything will be on the server side, so it’s impossible.
What you wanted to write (I think) was “javascript”, and this is a different story.
If you can see the data that interests you, you can also save it, even browsers have these options. If you need some kind of automation, I suggest looking for an extension to the browser.
I did it. I got lots of projects done but im just concerned.
They developed the project but they keep the files on their own hosting. This bothers me because I would prefer to own the files myself?
I paid thousands for many projects now. Do they keep the files for security purposes? I really don’t want them stealing money from me (ex. someone buys on my site and they swap out the paypals or something like that)