”PANDA的博客向上转型:就是把子类对象赋值给父类类型的变量。接下来用一个简单的例子来进行使用介绍: 创建父类 public class Person { public String name = "this is a people"; public String sing(Person person){ ...
Hurricane_m的博客先上代码 public class Son extends Father { public int i = 100;... System.out.println("子类 方法!!!"); } public static void main(String[] args) { Father son = new Son(); son.sh...