client. Is just a name for it.
It's to call the OSBOT API In another class basically
https://www.google.com/amp/www.javaworld.com/article/2979739/learn-java/java-101-classes-and-objects-in-java.amp.html
No ones offered to donate in a year with 4 SDN scripts lol. OSBOT is full of leecehers. I'll make the script nicer if it ever becomes premium, until then, it'll remain as is
Code Academy -> Head First Java -> ->Master the basics ->Look at osbot sample scripts. It will make it so much simpler
You need the basics at least. People should know how to properly use brackets, booleans, ints, etc