Resources to learn Java?

[tomer22g]

I'm quiet new here (my first thread).
I'm a high school student (also a mathematics student in the university).
But, I just started programming (specifically in Java).
I would be thankful if someone would give me sites, books, etc, in the subject.
I don't need any beginner's books that starts from zero.
I know how to write java up to classes level (including stacks, binary trees, etc.).

p.s: I want to write a program which gives you the time it takes to you to answer to a question given.
for example:
System.out.println("what's your dog's name?")
/here is the counting of the time/- we denote timer(i) the time taken to answer i-given string.
i=in.nextLine();
System.out.println("your answer is:"+i+" "+timer(i));

[alykins]

I think the oracle site is rather complex to navigate, but here and here are good places to start... what you really want to be able to find is something like this... what I have found to be the most efficient way at finding documentation like the last link is to type the class you want, the word class, and then java, then look for the link that starts with docs.oracle... example- I found that one by typing (in google) "java string class"... Learning to read the class documentation is key

for the task at hand I would make a while loop that evaluates the input (if you want to validate)... other than that you can just make a java timer (example) and start it right before you ask and stop right after they respond

[tomer22g]

Thank you very much, your sites are helpful.