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.
What do you mean, where does it come in the hierarchy? Its place in the hierarchy is shown explicitly in the Javadocs, which are available by clicking on the linkified ServletContext in any of these posts. It *has* no hierarchy, it simply is.