当 class 有子类时，如何实现 Singleton 设计模式？

Question

I have a Player class for a game and there are different player types: Animal, Person, Robot. I want my game to have a single instance of a player using the Singleton pattern but not sure if this is possible?

Answer 1

think simple, man. it's polymorphism. you can check it in here: https://www.w3schools.com/java/java_polymorphism.asp