Enterprise JavaBeans 3.1
Sixth Edition Oktober 2010
ISBN 978-0-596-15802-6
762 Seiten
eBook-Format: PDF, EPUB, MOBI
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Kolophon
The animals on the cover of Enterprise JavaBeans
3.1, Sixth Edition, are a wallaby and her joey. Wallabies are
medium-sized marsupials belonging to the kangaroo family
(Macropodidae; the second-largest marsupial family).
They are grazers and browsers, native to Australia, and found in a variety
of habitats on that continent. Female wallabies have a well-developed
anterior pouch in which they hold their young. When they are born, the tiny,
still-blind joeys instinctively crawl up into their mothers’ pouches and
begin to nurse. They stay in the pouch until they are fairly well grown. A
female wallaby can support joeys from up to three litters at once: one in
her uterus, one in her pouch, and one that has graduated from the pouch but
still returns to nurse.
Like all Macropodidae, wallabies have long,
narrow hind feet and powerful hind limbs. Their long, heavy tails are used
primarily for balance and stability and are not prehensile. Wallabies
resemble kangaroos but are smaller: they measure from less than two feet to
over five feet long, with the tail accounting for nearly half of their total
length. Oddly enough, although they can hop along quite quickly (reaching
speeds of up to 50 kilometers per hour), it is physically impossible for
wallabies to walk backward!
The three main types of wallaby are brush, rock, and nail-tailed.
There are eleven species of brush wallaby (genus
Macropus) and six named species of rock wallaby
(Petrogale). Brush wallabies usually live in brushland
or open woods. Rock wallabies, which are notable for their extreme agility,
are usually found among rocks and near water. There are only three species
of nail-tailed wallaby (Onychogalea), which are so
named because of the horny growth that appears on the tip of their tails.
The major threats to wallabies today are hunting, habitat destruction, and
predation by and competition with introduced species.
The cover image is from The Illustrated Natural History:
Mammalia, by J. G. Wood. The cover font is Adobe ITC Garamond.
The text font is Linotype Birka; the heading font is Adobe Myriad Condensed;
and the code font is LucasFont’s TheSansMonoCondensed.
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![[Cover]](../covers/9780596158026.s.gif)
