One of the
characteristics of a well-designed object is that it offers focused functionality.
In other words, an object, ideally, should not do various unr elated things.Encapsulating the logging, counting and other similar functionality into a
separate object leaves the service provider object with only the functionality
that it is designed to offer. In other words, it allows the service provider object
to perform. a well-defined, definite task.
来自 “ ITPUB博客 ” ，链接：https://blog.itpub.net/16792402/viewspace-584288/ ，如需转载，请注明出处，否则将追究法律责任。
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