what do you want to do with java? I have 10 years experience with java but recently moved to Ruby on Rails. In the adult business, ppl would tend to develop under a scripting platform because it's easier and faster to develop a site with more bells and whistles.
I think basic of OOP is the thing that would help you! first get acquainted with OOP and then try your hand on a OOP Language! i suggest read through this! alimsyed.com
Hi! Bruce Eckel has a free ebook "Thinking in Java". Just search for it..don't worry...completely legal. Highly recommended. Java is not used in production as much as..say..Perl because it has very high resource requirements on the server. There are java hosts..but they are rare. Bryon
If you want input in a Java program then you can use command line arguments for it. It will help to take input in a Java program from the user. OR if you want something else then please specify the question clearly.