关键字及其新特性
因为将父类转型成子类后会得到一个ClassCastException报错。所以向下转型前要养成一个好的习惯,那就是判断父类对象是否为子类对象的实例。
class Father {
}
class Child extends Father {
}public class Main {public static void main(String…
文章简介 论文名称:How human activities affect and reduce ecological sensitivity under climate change: Case study of the Yangtze River Economic Belt, China(人类活动如何在气候变化下影响和降低生态敏感性:以中国长江经济带为例&am…