摘要:
package zzz; // 创建继承 public class Demo2 { public static void main(String[] args) { Animal animal = new Animal(); animal.live(); animal.run(); System.o 阅读全文
摘要:
package zzz; // 《创建多态》 public class Demo1 { public static void main(String[] args) { Fish fish = new Fish(); fish.eat(); Rice rice = new Rice(); rice. 阅读全文