This week's book giveaway is in the OCAJP 8 forum. We're giving away four copies of OCA Java SE 8 Programmer I Study Guide and have Edward Finegan & Robert Liguori on-line! See this thread for details.
Jakarta was part of the Apache project, so technically, either term is correct. However in the last year or 2, a lot of Apache's sub-projects have been promoted to first-level status, including Tomcat, and the URLs and package names now generally reflect that. But the old URLs mostly still work.
An IDE is no substitute for an Intelligent Developer.