Learn to createJava enumwhereeachenumconstant may contain multiple values. We may use any of the values of theenumconstant in our application code, and we should be able to get the enum constant from any of the values assigned to it. 1. How to Create Enum with Multiple Values The syntax...
In this guide to Java enum with string values, learn to create enum using strings, iterate over all enum values, get enum value and to perform reverse lookup to find enum by string parameter. In thisguide to Javaenumwith string values, learn tocreate enum using strings, iterate over all e...
values() 返回枚举类的所有常量; ordinal() 返回枚举常量的序号 valueOf(String name) 返回名为name的枚举常量,如果存在。 //演示 values(), ordinal() 和 valueOf() 方法enumColor { RED, GREEN, BLUE; }publicclassTest {publicstaticvoidmain(String[] args) { Color arr[]=Color.values();for(Color ...
typeT, the implicitly declaredpublic static T valueOf(String)method on that enum may be used instead of this method to map from a name to the corresponding enum constant. All the constants of an enum type can be obtained by calling the implicitpublic static T[] values()method of that ...
containing all of the values of the enum in the order they are declared. This method is commonly used in combination with the for-each construct to iterate over the values of an enum type. For example, this code from thePlanetclass example below iterates over all the planets in the solar...
简介: Java 获取Enum枚举中的值,以列表方式返回 有时候,有一些下拉选择器的数据项,我们采取了枚举的方式简单记录,但是里面的东西多,前端不想写死,需要提供接口返回。 示例: 枚举 /** * @Author: JCccc * @Description: * @Date: Create in 10:51 2021/1/25 */ public enum EducateStatusEnum { /** ...
自Kotlin 1.1 起,可以使用 enumValues<T>() 和enumValueOf<T>() 函数以泛型的方式访问枚举类中的常量。 1.4.1、访问枚举变量属性 例: fun main(args: Array<String>) { println("name = " + Color.RED.name + "\tordinal = " + Color.RED.ordinal) println("name = " + Color.WHITE.name + "...
classT, the implicitly declaredpublic static T valueOf(String)method on that enum may be used instead of this method to map from a name to the corresponding enum constant. All the constants of an enum class can be obtained by calling the implicitpublic static T[] values()method of that ...
最近做项目时使用到了mybatis-plus和shardingsphere。只要在PO中使用了EnumValue注解,加载该PO时就会报“getObject with type”,不使用shardingsphere就不会出现这样的问题。查看报错的堆栈过后发现报错最后在shardingsphere的AbstractUnsupportedOperationResultSet抽象类。实际调用的是该抽象类的子类ShardingResultSet ,但是该子...
Enum maps are maintained in thenatural orderof their keys (the order in which the enum constants are declared). This is reflected in the iterators returned by the collections views (#keySet(),#entrySet(), and#values()). Iterators returned by the collection views areweakly consistent: they wi...