《Head First 设计模式》学习笔记——适配器模式 + 外观模式

public interface Duck {
	public void quack();

	public void fly();
}

//implements实现接口
public class MallardDuck implements Duck {
	public void quack() {
		System.out.println("Quack");
	}

	public void fly() {
		System.out.println("I'm flying");
	}
}


public interface Turkey {
	public void gobble();

	public void fly();
}

//implements实现接口
public class WildTurkey implements Turkey {
	public void gobble() {
		System.out.println("Gobble gobble");
	}

	public void fly() {
		System.out.println("I'm flying a short distance");
	}
}

//首先，需要实现想转换成的类型接口
public class TurkeyAdapter implements Duck {
	Turkey turkey;

	//接着，需要获得要适配对象的引用
	public TurkeyAdapter(Turkey turkey) {
		this.turkey = turkey;
	}

	//需要实现接口中的所有方法
	public void quack() {
		turkey.gobble();
	}

	public void fly() {
		for (int i = 0; i < 5; i++) {
			turkey.fly();
		}
	}
}

public class DuckTestDrive {
	public static void main(String[] args) {
		MallardDuck duck = new MallardDuck();

		WildTurkey turkey = new WildTurkey();
		//将火鸡包装进一个火鸡适配器
		Duck turkeyAdapter = new TurkeyAdapter(turkey);

		System.out.println("The Turkey says...");
		turkey.gobble();
		turkey.fly();

		System.out.println("\nThe Duck says...");
		testDuck(duck);

		System.out.println("\nThe TurkeyAdapter says...");
		testDuck(turkeyAdapter);
	}

	static void testDuck(Duck duck) {
		duck.quack();
		duck.fly();
	}
}