Introduction to OO design principles for head-design patterns

Design Pattern OO Principles


1, package change--single responsibility principle

2, multi-use combination, less-use inheritance-the principle of the Richter replacement


3, for interface programming, not for implementation--interface isolation principle


4, strive for loosely coupled design between interactive objects--Dimitri law


5, the class should be open to the expansion, to modify the closure--opening and closing principle


6, dependence on abstraction, not on concrete classes--dependency inversion principle