Hi, I am learning the Servlets in Head First Servlets and JSP Book. I am finding diffculty in understanding the listener topics(such as ServletContextListener, HttpSessionListener.....).
This book explains everything very clearly by pictorial representation and I understood very well all the topics expect the listener section. I am just wondering even if I can't understand the concepts in this book, whether this topics can be learnt from some other material or free on-line tutorial.
However, If anyone knows the good tutorial for beginners will be very useful. And also just give a brief introduction to why we are using listener interfaces in servlets and its uses?