Well As I see haibhailie you have some problems with the syntax So I would like to ask you if you are using a java editor if not you could try the Eclipse
very useful for preventing syntax errors. Also you could read a book like Sams teach yourself java in 24hours
it is very helpful(the first java book I read). Apart from that try when you want to do something just write in Google
java and 1 to 3 words of your problem you will need to build many projects before having a problem which you can't find. last but not least, I want to mention that I am 13 years old too and I was in your shoes as a result this advise will help you as they helped me.
Ps: The book you can either purchase it from a book store(either online or in your neighborhood) or download it(not much recommended) from a torrent