I'm a professional lector and Java programmer. I'm programming in Java since 2007. I used to train official Sun Microsystems Java trainings and teach programming in Java at University of Pardubice (Czech Republic, middle of Europe). I also participated on several Java-based projects (as a junior and senior programmer and project manager). I have following Sun/Oracle certifications: SCJP (Sun Certified Java Programmer), SCWCD (Oracle Java EE 5 Web Component Developer). I am also SpringSource certified programmer.
Author of https://javalibs.com