Java Basic(56)-Polymorphic Arguments

創建新class稱為fatty：

public class fatty {

public void digest(food x){ →方法稱為digest和food X為參數

x.eat();

}

}

in apples.java:

class apples{

public static void main(String[] args){

fatty bucky = new fatty();

food fo = new food(); →因為在fatty.class，參數是food

food po = new tuna(); →您可以調用在potpie和tuna的價值

bucky.digest(fo);

bucky.digest(po);

}

}

這是運行時的結果： 

this food is great

this tuna is great