Q:	Q: So ArrayList is cool, but how would I know it exists?
A:	A: The question is really, “How do I know what’s in the API?” and that’s the key to your success as a Java programmer. Not to mention your key to being as lazy as possible while still managing to build software. You might be amazed at how much time you can save when somebody else has already done most of the heavy lifting, and all you have to do is step in and create the fun part.