package?edu.zzuli1;

public?interface?IwatchDoor?{
	public?abstract?void?watchDoor();

}
package?edu.zzuli1;

public?class?Animal?{
	public?void?eat(){
		System.out.println("狗具有吃的能力");
	}

}
package?edu.zzuli1;

import?edu.zzuli.IplayGame;

public?class?Dog?extends?Animal?implements?IplayGame?{

	@Override
	public?void?playGame()?{
		//?TODO?自動生成的方法存根
??????System.out.println("狗具有看門的能力");
	}

}

package edu.zzuli1;

public class Test1 {

public static void main(String[] args) {

// TODO 自動生成的方法存根

IwatchDoor dog = new Dog();

}

}

為什么顯示錯誤，說IwatchDoor dog = new Dog(); ?說類型不匹配，報錯了呢？？？？急急急