Java Basic(49)-Inheritance繼承

In food.java:

public class food {

public void eat(){ →必須是public的，因為private不能使用

System.out.println("I am the eat methods");

}

}

In potpie.java and tuna.java:

public class tuna extends food{

public void eat(){

System.out.println("I am the new method of tuna"); →將覆寫方法

}

}

public class potpie extends food{ → extends的意思是繼承 food.java

}

In apple.java:

class apples{

public static void main(String[] args){

tuna tunaObject = new tuna();

potpie potObject = new potpie();

tunaObject.eat();

potObject.eat();

}

}

這是運行時的結果：

I am the new method of tuna

I am the eat methods