For further API reference and developer documentation, see Java SE Developer Documentation. That documentation contains more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples.
What is this thing? Is it a book? Is it a companion online reference somewhere? The link points to a page that seems to lead me in circles and leaves me confused.
On the left there is a menu for different Java editions. If you click on Java SE, and on the tab Documentation, there should be a lot of information.
There is a lot of information, it is hard to see the forest for all the (link) trees. There is some great stuff to get going, like the Java Tutorials. There is also some stuff that seems, I don't know, possibly outdated and the links are scattered.
I was looking for a single book or document called "Java SE Developer Documentation", something similar to the OpenGL Blue Book or Python Library Reference, that would give me "more detailed, developer-targeted descriptions, with conceptual overviews, definitions of terms, workarounds, and working code examples." Is there any such thing?
For now I'll walk through the forest of link trees in the Java SE Documentation area accessed by following your directions rather than the seemingly more seemingly circular Java SE 6 Documentation page accessed by clicking the JDK Documentation link at the top of the page I first linked to.