一些面向对象的设计法则

一些面向对象的设计法则

• Favor Composition Over Inheritance,优先使用（对象）组合，而非（类）继承
• Program To An Interface, Not An Implementation ,针对接口编程，而非（接口的）实现
• Software Entities Should Be Open For Extension, Yet Closed For Modification,开放－封闭法则（OCP）
• Function Thar Use Referennces To Base(Super) Classes Must Be Able To Use Objects Of Derived(Sub) Classes Without Knowing It ,Liskov替换法则（LSP）