[4749] in java-interest
Re: HELP - need abstract static variables (no good solution?)
daemon@ATHENA.MIT.EDU (Gary L. Craig)
Fri Jan 12 10:25:01 1996
Date: Fri, 12 Jan 96 08:42:56 EST
From: craig@cat.syr.edu (Gary L. Craig)
To: ranlevy@eandm.co.il
Cc: java-interest@java.Eng.Sun.COM
In-Reply-To: <9601111818.AA11986@draven.Eng.Sun.COM> (ranlevy@eandm.co.il)
In the case of wanting a per class object for all subclasses:
1) Make your "buffer" a true object. Then your "initData()" method
gets sucked into the "buffer's" constructor!
2) Use the "Singleton" pattern from the GoF book! Here instead of
constructing the buffer at class load time, you create it upon
creating the first object.
There are still problems about needing a per subclass static! In
general this is a strange design, to use "subclassing" to partition by
data.
A better design is to create:
ObjectGroupOne and
ObjectGroupTwo
And now have your data var associated with an "instance" of a group
(Collection) object. Add to this a factory method (again GoF) with
Class.newInstance() and you have the object groups create their own
members!
--
Gary L. Craig phone: (315) 443-5936
Superlative Software Solutions, Inc. (3Si) FAX: (315) 443-4745
2-212 Center for Science and Technology email: craig@cat.syr.edu
Syracuse University Syracuse, NY 13244-4100 http://www.cat.syr.edu/~craig
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