I want to start gaining knowledge about the Java EE. Right now i have a book called Java Server programming J2EE 1.4 Black book Platinium edition by Kogent Solutions Inc from Dreamtech press. They have also released a new edition called Java EE 6 Black Book. I just assume that Java EE 6 has some more added features compared to J2ee 1.4 and Java EE 5.
Does opting to study for Java EE 6 covers all the topics of Java EE 5 and J2ee 1.4? Or is it that J2EE 1.4 is different from Java EE 5 which is in turn different from Java EE 6. I was googling about it and got totally lost out.
Kindly explain me the differences and also suggest me which edition of that book should i start to study in order to have an understanding in Java's Enterprise Edition.
Thanks a lot.