策略模式

策略

interface FlyBehaviorfly()

CantFlyfly(){}

RedDuckvoid RedDuck(){flyBehavior = new FlyByWing();quackBehavior = new WaWaJiao();}

GreenDuckvoid GreenDuck(){flyBehavior = new CantFly();quackBehavior = new GuGuJiao();}

interface QuackBehaviorquack()

GuGuJiaoquack(){}

CantJiaoquack(){}

每组行为就是一个算法族，每个算法可以互换

WaWaJiaoquack(){}

DuckFlyBeahvior flyBehavior;QuackBehavior quackBehavior;void performFly(){flyBehavior.fly();}void performQuack(){quackBehavior.quack();}swim(){}display(){}

声音行为接口

飞行行为接口

FlyByWingfly(){}

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