策略设计模式简单代码实现

package com.worsun.DuckDesign; public abstract class Duck { FlyBehavior flyBehavior; QuackBehavior quackBehavior; public Duck(){ } public abstract void display(); public void performFly(){ flyBehavior.fly(); } public void performQuack(){ quackBehavior.quack(); } public void swim(){ System.out.println("All ducks float, even decoys!"); } ///动态的设定行为，加入新的方法,改变鸭子的飞的行为 public void setFlyBehavior(FlyBehavior fb){ flyBehavior = fb; } ///动态的设定行为，加入新的方法,改变鸭子的叫的行为 public void setQuackBehavior(QuackBehavior qb){ quackBehavior = qb; } }