To help you get the most from the text and keep track of what's happening, we've used a number of conventions throughout the book.
Boxes like this one hold important, not-to-be forgotten information that is directly relevant to the surrounding text.
This background style is used for asides to the current discussion.
The following styles are also used in the text:
When we introduce important words, we highlight them in italics.
We show keyboard strokes like this: Ctrl+A.
We show file names and code within the text like so: persistence.properties.
We present code in two different ways:
In code examples, the code foreground style shows new, important, pertinent code.
The code background style shows code that's less important in the present context, or has been shown before.