老翟

Bark，狗叫声类import java.util.Collection;
import java.util.List;


public class Bark {
	private String sound ;

	private DogDoor dogDoor ;
	
	public Bark(DogDoor dogDoor){
		this.dogDoor = dogDoor ;
	}
	public Bark(String sound) {
		this.sound = sound ;
	}
	public Bark(DogDoor dogDoor,String sound) {
		this(dogDoor) ;
		this.sound = sound ;
	}

	
	public boolean equals(Bark bark) {
		if(bark!=null && bark.sound.equals(this.sound)){
			return true ;
		}
		return false ;
	}
	
	public String getSound() {
		return sound;
	}

	public void setSound(String sound) {
		this.sound = sound;
	}
	
	public Bark() {} 
	
}

BarkRecognizer，狗叫识别器import java.util.Collection;
import java.util.Iterator;


public class BarkRecognizer {
	private DogDoor dogDoor ;

	public BarkRecognizer(DogDoor dogDoor) {
		super();
		this.dogDoor = dogDoor;
	}
	
	public void recognizer(Bark bark) {
		Collection barks = dogDoor.getAllowedBarks() ;
		Iterator it = barks.iterator() ;
		while(it.hasNext()){
			if(bark.equals((Bark)it.next()) ){
				dogDoor.open() ;
				System.out.println("the door opens");
				break ;
			}
		}
		
		System.out.println(bark.getSound() + "is not bruce");
		
//		if(barks != null && barks.size() >=1){
//			 if(barks.contains(bark)){
//				 dogDoor.open() ;
//			 }
//		}
	}
	
	public BarkRecognizer() {}
}

狗门import java.util.LinkedList;
import java.util.List;
import java.util.Timer;
import java.util.TimerTask;

public class DogDoor {
	
	private boolean open ;
	List barks = new LinkedList();
	
	public void open() {
		if(!open){
			this.open = true ;
		}
		final Timer timer = new Timer() ;
		timer.schedule(new TimerTask(){
			public void run() {
				close() ;
				timer.cancel() ;
			}
		},5000);
	}
	
	public void close() {
		this.open = false ;
		System.out.println("the door close");
	}
	
	public void addAllowedBark(Bark bark) {
		if(bark!=null){
			this.barks.add(bark) ;
		}
	}
	
	public List getAllowedBarks() {
		return this.barks ;
	}
	
	public boolean isOpen() {
		return open ;
	}
	
}	

遥控器
public class Remote {
	private DogDoor dogDoor ;

	public Remote(DogDoor dogDoor) {
		super();
		this.dogDoor = dogDoor;
	}

	public void pressButton() {
		dogDoor.open() ;
	}
	
	public Remote() {} ;
}

测试类import org.junit.Test;



public class TestDogDoor {
	@Test
	public void dogDoorTest() {
		DogDoor door = new DogDoor() ;
		door.addAllowedBark(new Bark("rowlf")) ;
		door.addAllowedBark(new Bark("roooowlf")) ;
		door.addAllowedBark(new Bark("woof")) ;
		door.addAllowedBark(new Bark("rawlf")) ;
		
		BarkRecognizer recognizer = new BarkRecognizer(door) ;
		
		Remote remote = new Remote(door);

		System.out.println("bruce starts barkings") ;
		
		recognizer.recognizer(new Bark("rowlf")) ;
		
		System.out.println("bruce has gone outside") ;
		
		try{
			Thread.currentThread().sleep(1000) ;
		}catch(InterruptedException e){
			System.out.println("error") ;
		}
		
		System.out.println("bruce' all done") ;
		System.out.println("but he's stuck outside!") ;
		Bark smallDogBark = new Bark("yip") ;
		System.out.println("a small dog starts barking");
		recognizer.recognizer(smallDogBark) ;
		
		try{
			Thread.currentThread().sleep(1000) ;
		}catch(InterruptedException e){
			System.out.println("error") ;
		}
		System.out.println("bruce starts barking");
		recognizer.recognizer(new Bark("woof")) ;
		
		System.out.println("bruce 'back inside");
		
	}
}