Interface实现多态简例
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(wú)需實(shí)現(xiàn)接口，只需要利用接口名創(chuàng)建對(duì)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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