SCJP: Collection types are managed arrays. Me: ORLY?

[pne]

Quoth the SCJP study guide:

Arrays are efficient, but most of the time you'll want to use one of the Collection types from java.util (including HashMap, ArrayList, TreeSet). Collection classes [… a]re really managed arrays, since they use arrays behind the scenes. […]

ORLY. Show me how a TreeSet uses arrays behind the scenes. Or a LinkedList, which—though they didn’t mention it explicitly—is also “one of the Collection types from java.util”.)

Feh.

If this goes on much further, I’ll have to create a separate entry just for their weirdness rather than posting as I go along.