java接口练习：看下图实现如下接口和类，并完成Adventure中的主方法。

package pack1;

public interface CanFly {
    void fly();

}

package pack1;

public interface CanSwim {
    void swim();

}

package pack1;

public abstract  class ActionCharacter {
    abstract void fight(String emp);
    void speak(String s)
    {
        System.out.println(s);
    }
}

package pack1;

public class Hero extends ActionCharacter implements CanSwim, CanFly {
    String name;

    public Hero(String name) {
        super();
        this.name = name;
    }

    @Override
    public void fly() {
        System.out.println(this.name+"会飞");

    }

    @Override
    public void swim() {
        System.out.println(this.name+"会游泳");

    }

    @Override
    void fight(String emp) {
        System.out.println(this.name+"打架很厉害");

    }

}

package pack1;

public class Adventure {

    public static void main(String[] args) {
        Hero hb=new Hero("超人");
        hb.swim();
        hb.fly();
        hb.fight(null);
        CanFly cf=hb;
        cf.fly();
        CanSwim cs=hb;
        cs.swim();
        ActionCharacter ac=hb;
        ac.fight("超人");
        ac.speak("你好");

    }

}