I have been working (for a company) with J2EE technologies since January 2012, but I started developing small projects in high-school and, especially, in college. More specifically, the skills gained and the technologies I used are described in the "Skills" section of my profile.
I worked on the back-end of projects (implementing business logic in the Java programming language), as well as on the front-end (the user interface - pages created with JSP/JSPX, different Javascript frameworks, HTML and CSS).
I am familiar with the following IDE's: Eclipse, Springsource Tool Suite, JIdea, Rational Application Developer. I also used databases such as MySQL, Oracle 10g and DB2.
I could show you the web applications that I created/help create, but most of them are B2B webapps and require authentication.