资讯
In method overriding, you have methods having identical signatures present in both the base and the derived classes. You would typically want to use virtual methods to implement run-time ...
Use Java's extends keyword to derive a child class from a parent class, invoke parent class constructors and methods, override methods, and more.
一些您可能无法访问的结果已被隐去。
显示无法访问的结果