— Scott McNealy, Sun Microsystems Chairman, President and ceo



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Head First Java (Kathy Sierra, Bert Bates) (z-lib.org)

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this is a new chapter
165
7

inheritance and 
polymorphism 
Plan your programs with the future in mind. 
 
If there were a way to write 
Java code such that you could take more vacations, how much would it be worth to you? What 
if you could write code that someone else could extend, easily? And if you could write code 
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Make it Stick


166
 
chapter 7
Chair Wars Revisited...
Remember way back in chapter 2, when Larry (procedural guy) 
and Brad (OO guy) were vying for the Aeron chair? Let’s look at 
a few pieces of that story to review the basics of inheritance.
LARRY: You’ve got duplicated code! The rotate procedure 
is in all four Shape things. It’s a stupid design. You have to 
maintain four different rotate “methods”. How can that 
ever be good?

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