java 接口 练习

package c;

public interface Icanfly {

    void fei();
}

package c;

public class feiji implements Icanfly {

    //飞机
    @Override
    public void fei() {

        System.out.println("我是飞机，我能飞");

    }

}

package c;

public class niao implements Icanfly {

    @Override
    public void fei() {

        System.out.println("我是鸟，我能飞");

    }

}

package c;

public class ceshifei {

    public static void main(String[] args) {

        feiji f1 = new feiji();

        //f1.fei();

        niao n1 = new niao ();
        //n1 .fei();

        //让能飞的事物飞起来
        makefly(f1);
        makefly(n1);

    }

    //让会飞的事物飞起来
    public static void makefly(Icanfly cf)
    {
        cf.fei();
    }

}