**参考阅读** https://www.javatpoint.com/abstract-class-in-java https://www.differencebetween.com/difference-between-abstract-class-and-vs-interface/ https://www.javaworld.com/article/2077421/learn-java/abstract-classes-vs-interfaces.html 分类: java基础 好文要顶 关注我 收藏该文 微信分享 ...
class TPoint extends Point { static double x = 4.7; public static void main(String[] args) { new TPoint().printX(); } void printX() { System.out.println(x + " " + Point.x); } } 4.7 2 类的继承 子类可重新定义父类中已有的实例变量 ...
mybatis报错invalid types () or values ()解决方法 使用mybatis报错:Error instantiating class com.dayu.jobratingserver.entity.TPointTemporaryEntity with invalid types (TPointEntity) or values (701). Cause: java.lang.IllegalArgumentException: argument type ......