最病 A Pattern Categories I -- Goal o Creational Patterns: involve object instantiation and all provide a way to decouple a client from the objects it needs to instantiate a Structural Patterns: compose classes or objects into larger structures a Behavioral patterns: concerned with how classes and objects interact and distribute responsibility Institute of Computer Software 2021/2/7 Nanjing UniversityPattern Categories I -- Goal  Creational Patterns: involve object instantiation and all provide a way to decouple a client from the objects it needs to instantiate.  Structural Patterns: compose classes or objects into larger structures.  Behavioral Patterns: concerned with how classes and objects interact and distribute responsibility 2021/2/7 Institute of Computer Software Nanjing University 13