ITEC 120 2012fall dbraffitt ibarland

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lab10b
finishing your beverage

Overloading: Two functions with the same name, but with different signatures. Note that when looking at a function call, it's possible to discern which function you want, based on the different signature. Fore example: java.lang.String#substring vs. java.lang.String#substring.

We can overload functions ourselves: we can write String oneVerse(int n) that returns verse #n about rootbeer, and String oneVerse(int n, String bev) that returns verse #n about bev. Whenever somebody calls oneVerse, the computer knows which version it should call based on what arguments are being supplied.

We will complete last week's lab10a—practicing loops: 99 bottles, and check you off (through #8) — that's six functions, but four of them will be a single line, and one more will be a loop with only two lines in the body. The only long one is printing a single verse!

Be sure not to have lots of repeated code! In particular:

• If I were asked to change, say, “pass it around” to “smile don't frown”, I should only have to change one place in the code — -- not even two places¹.
• If I want to change “rootbeer” to “apple cider”, there should only be one change (not three).
  (Hint: use a named constant.)
• Of your six methods, three of them will probably be a single line (body).

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©2012, Ian Barland, Radford University Last modified 2012.Nov.01 (Thu)

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