2019獨(dú)角獸企業(yè)重金招聘Python工程師標(biāo)準(zhǔn)>>>

Realization in Java:

public interface Food(){

???????? public void isEaten();

}

class Dish implements Food {

???????? public String name;

???????? public Dish(String name){

???????? this.name=name;

}

public void isEaten(){

???????????System.out.println("Food "+name+" is eaten. ");

}

}

class Guest{?????????????????????????????????????? //?無需實(shí)現(xiàn)接口，只需要利用接口名創(chuàng)建對象。?? <<use>>

????????? public Food lunch;???????????????? //??間接使用到了class Dish的constructor?和?attribute.?實(shí)現(xiàn)了多態(tài)性 polymorphism

????????? public Guest(){

????????????? lunch= new Dish("Spaghetti");

}

}

}

轉(zhuǎn)載于:https://my.oschina.net/u/1409824/blog/286058

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