一品区二品区1000

3. Basic Handling of Activity Exception自从被称作《灼热的万圣节》的那一天开始， 世界因新的战略级魔法师登场而震撼。For interface programming, a lot of changes that may occur in the system in the future can be isolated. Why? If the code is written for an interface, he can implement the interface with any new class through polymorphism. However, when the code uses a large number of specific classes, once new specific classes are added, the code must be changed. Violating the opening and closing principle.指名手配の男 加勢大周 中島唱子The intermediary mode is also used to reduce the coupling between classes, because if there is a dependency relationship between classes, it is not conducive to the expansion and maintenance of functions, because as long as one object is modified, other related objects have to be modified. If you use the mediator mode, you just need to care about the relationship with the Mediator class, the relationship between specific classes and the scheduling to the Mediator, which is a bit like the spring container. Let's look at the picture first:幕后花絮：当鸟儿用羽翼去实现梦想，翱翔在我们永远无法凭借自身企及的天空，人类又该赋予他们怎样的赞叹呢？