接口函数的调用

package free;/*
@author wb    
@great forever
i think,therefor i am
*/

interface Charge{  void charge();  }
interface Play{  void play();  }
public class javafirst {
    public static void main(String[] args) {
        bus b = new bus();
        taxi t = new taxi();
        cinema c = new cinema();
        b.charge();
        t.charge();
        c.charge();
        c.play();
    }
}

package free;/*
@author wb    
@great forever
i think,therefor i am
*/

public class collect {
    public void funcollect(Charge s) {
        s.charge();
    }
}

package free;/*
@author wb    
@great forever
i think,therefor i am
*/

class cinema implements Charge,
        Play{  public void charge()
{
    System.out.println("西海岸电影城：30元/张，凭学生证享受半价");
}
    public void play(){
        System.out.println("正在放映电影");
    }
}

package free;/*
@author wb    
@great forever
i think,therefor i am
*/

class bus implements Charge{
    public void charge(){

        System.out.println("公共汽车：1元/张，不计公里数");
    }
}

package free;/*
@author wb    
@great forever
i think,therefor i am
*/

class regularBus extends bus implements Charge{

    regularBus(){
        super();
    }


}