Other sources of information include two recommended books for CS102:
If you choose not to purchase this book, you can use the 1/2/98 online version, which was downloaded from www.bruceeckel.com. (If you desire a hardcopy of the book, be aware that it is 848 pages, so buying it at the bookstore may be more convenient than printing it.)
If you choose not to purchase this book, you can use the online Java package documentation.