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Introduction to java -- Enumeration concept enumeration is a new feature introduced in JDK 1.5 grammar public enum Color{ //Add public static final Color by default RED,GREEN,BLUE; } essence Enumeration is a restricted class and has its own methods. When you create your own enum class, this class inherits from Java lang.Enum ...

1, Enum I Use of enumeration classes Understanding of enumerating classes: there are only a limited number of objects in a class. For sure, we call this class enumerating classEnumeration classes are strongly recommended when you need to define a set of constantsIf there is only one object in the enumeration class, it can be used as an im ...

Abstract: in this article, we will continue to share and introduce the second "code optimization question" about Java interview. The main functions are: Based on the idea of "annotation + Enum enumeration + policy mode" based on Spring Boot, we often need to increase or decrease the judgment of if else or the value of consta ...