java enum的讲解

Java Enum - Full Simple Tutorial

Java Enum Tutorial | Complete Guide with Hands on | From Beginner to Expert Level | Easy Explanation

Java Tutorial For Beginners | Enumeration In Java | Java Enum Explained | SimpliCode

Understanding the Class, Interface or Enum Expected Error in Java

Understanding the Use of enum in a Class Constructor in Java

#24. Enumeration in Java | Why Enums Were Introduced | Enum vs Constants | Java Tutorial