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You
should not use a class to describe a single object
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Every
noun should not be a class
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Classes
should collect objects with similar behavior
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Classes
should be large enough to describe a significant set of
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objects,
but, they should not be too large either
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You
may find it tempting to design classes that are very general, but that
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usually
is not helpful
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Avoid
public data and cluttered interfaces
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Operations
in a class should be consistent with each other in
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regard
to their: names, arguments, return values, and behavior
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Good
use of inheritance requires finding a “common” set of data
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and/or
functionality to all classes
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