Well, he did at least post in the best available forum.
Ju, I would recommend picking up a copy of "Java in a Nutshell" by David Flanagan for starters. Reading it would probably help both your Java and your English. It would be good if you had access to a machine with a Java SDK installed so you could try things out. Bookmark the Sun JavaDoc site in your browser for reference (
http://java.sun.com/j2se/1.3/docs/api/index.html is what I've bookmarked, though it's not the most recent version).