《Head First 设计模式》学习笔记——策略模型

public abstract class duck {

    FlyBehavior flybehavior;
    QuackBehavior quackbehavior;
    public duck(){
    }

	//抽象类
    public void abstract display();
    
    public void performFly() {
        flybehavior.fly();
    }

    public void performQuack() {
        quackbehavior.quack();
    }

    public void swim() {
        System.out.println("All ducks float, even decoys.");
    }
	
	//设定动态行为
	public void setFlyBehavior(FlyBehavior fb) {
		flybehavior = fb;
	}

	public void setQuackBehavior(QuackBehavior qb) {
		quackbehavior = qb;
	}
}

public interface Flybehavior {
	public void fly();
}

public interface Quackbehavior {
	public void quack();
}