通过例子来理解java多态!
操作方法
(01)abstract class Animal{abstract void eat();}class Pig extends Animal{public void eat(){tln("饲料");}public static void sleep(){tln("睡觉");}}class Dog extends Animal{public void eat(){tln("骨头");}public static void Pao(){tln("跑");}}class Cat extends Animal{public void eat(){tln("吃鱼");}public static void cachmouth(){tln("抓老鼠");}}
(02)class test{public static void main(String[] ats)public static void eatfunction(Animal a){();if(a instanceof Cat){Cat c=(Cat)a;mouth();}else if(a instanceof Dog){Dog d =(Dog)a;();}else if(a instanceof Pig){Pig p =(Pig)a;p();}}}
(03)多态的好处是大大提高了函数的扩展性!
特别提示
必须是类与类之间要有关系!
存在覆盖!