Lesson: Arrays and Enumerated Types课程：数组和枚举类型

From the Java virtual machine's perspective, arrays and enumerated types (or enums) are just classes. 从Java虚拟机的角度来看，数组和枚举类型（或枚举）只是类。Many of the methods in Class may be used on them. Class中的许多方法都可以用于它们。Reflection provides a few specific APIs for arrays and enums. 反射为数组和枚举提供了一些特定的API。This lesson uses a series of code samples to describe how to distinguish each of these objects from other classes and operate on them. 本课程使用一系列代码示例来描述如何将这些对象与其他类区分开来，并对它们进行操作。Various errors are also be examined.还将检查各种错误。

Arrays数组

Arrays have a component type and a length (which is not part of the type). 数组有一个组件类型和一个长度（它不是该类型的一部分）。Arrays may be manipulated either in their entirety or component by component. 数组可以整体操作，也可以逐个组件操作。Reflection provides the java.lang.reflect.Array class for the latter purpose.反射提供java.lang.reflect.Array类用于后一个目的。

• Identifying Array Types识别数组类型 describes how to determine if a class member is a field of array type描述如何确定类成员是否为数组类型的字段
• Creating New Arrays创建新数组 illustrates how to create new instances of arrays with simple and complex component types演示如何创建具有简单和复杂组件类型的数组的新实例
• Getting and Setting Arrays and Their Components获取和设置数组及其组件 shows how to access fields of type array and individually access array elements显示如何访问数组类型的字段，以及如何单独访问数组元素
• Troubleshooting故障排除 covers common errors and programming misconceptions涵盖常见错误和编程误解

Enumerated Types枚举类型

Enums are treated very much like ordinary classes in reflection code. 枚举与反射代码中的普通类非常相似。Class.isEnum() tells whether a Class represents and enum. Class.isEnum()告诉Class是否表示和enum。Class.getEnumConstants() retrieves the enum constants defined in an enum. 检索枚举中定义的枚举常量。java.lang.reflect.Field.isEnumConstant() indicates whether a field is an enumerated type.指示字段是否为枚举类型。

• Examining Enums检查枚举 illustrates how to retrieve an enum's constants and any other fields, constructors, and methods说明如何检索枚举的常量和任何其他字段、构造函数和方法
• Getting and Setting Fields with Enum Types获取和设置枚举类型的字段 shows how to set and get fields with an enum constant value演示如何设置和获取具有枚举常量值的字段
• Troubleshooting故障排除 describes common errors associated with enums描述与枚举关联的常见错误