NestingKind (Java SE 23 & JDK 23)
Description: declaration: module: java.compiler, package: javax.lang.model.element, enum: NestingKind
Keywords: javax.lang.model.element.NestingKind class

# Enum Class NestingKind

java.lang.Object
java.lang.Enum<NestingKind>
javax.lang.model.element.NestingKind

All Implemented Interfaces:
  `Serializable`, `Comparable<NestingKind>`, `Constable`

public enum NestingKind extends Enum<NestingKind>
The nesting kind of a type element. Type elements come in four varieties: top-level, member, local, and anonymous. Nesting kind is a non-standard term used here to denote this classification.

Note that it is possible additional nesting kinds will be added in future versions of the platform.

Example: The classes below are annotated with their nesting kind.

>      import java.lang.annotation.*;
>      import static java.lang.annotation.RetentionPolicy.*;
>      import javax.lang.model.element.*;
>      import static javax.lang.model.element.NestingKind.*;

>      @Nesting(TOP_LEVEL)
>      public class NestingExamples {
>          @Nesting(MEMBER)
>          static class MemberClass1{}

>          @Nesting(MEMBER)
>          class MemberClass2{}

>          public static void main(String... argv) {
>              @Nesting(LOCAL)
>              class LocalClass{};

>              Class<?>[] classes = {
>                  NestingExamples.class,
>                  MemberClass1.class,
>                  MemberClass2.class,
>                  LocalClass.class
>              };

>              for(Class<?> clazz : classes) {
>                  System.out.format("%s is %s%n",
>                                    clazz.getName(),
>                                    clazz.getAnnotation(Nesting.class).value());
>              }
>          }
>      }

>      @Retention(RUNTIME)
>      @interface Nesting {
>          NestingKind value();
>      }

Since:
  1.6

- ## Nested Class Summary

  ### Nested classes/interfaces declared in class java.lang.Enum

  `Enum.EnumDesc<E extends Enum<E>>`

- ## Enum Constant Summary

  Enum Constants
  Enum Constant
  Description
  `ANONYMOUS`
  A class without a name.
  `LOCAL`
  A named class or interface declared within a construct other than a class or interface.
  `MEMBER`
  A class or interface that is a named member of another class or interface.
  `TOP_LEVEL`
  A top-level class or interface, not contained within another class or interface.

- ## Method Summary

  Modifier and Type
  Method
  Description
  `boolean`
  `isNested()`
  Does this constant correspond to a nested type element?
  `static NestingKind`
  `valueOf(String name)`
  Returns the enum constant of this class with the specified name.
  `static NestingKind[]`
  `values()`
  Returns an array containing the constants of this enum class, in the order they are declared.

  ### Methods declared in class java.lang.Enum

  `clone, compareTo, describeConstable, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

  ### Methods declared in class java.lang.Object

  `getClass, notify, notifyAll, wait, wait, wait`

- ## Enum Constant Details

  - ### TOP_LEVEL

    public static final NestingKind TOP_LEVEL
    A top-level class or interface, not contained within another class or interface.

  - ### MEMBER

    public static final NestingKind MEMBER
    A class or interface that is a named member of another class or interface.
    See Java Language Specification:
      8.5 Member Class and Interface Declarations

  - ### LOCAL

    public static final NestingKind LOCAL
    A named class or interface declared within a construct other than a class or interface.
    See Java Language Specification:
      14.3 Local Class Declarations

  - ### ANONYMOUS

    public static final NestingKind ANONYMOUS
    A class without a name.
    See Java Language Specification:
      15.9.5 Anonymous Class Declarations

- ## Method Details

  - ### values

    public static NestingKind[] values()
    Returns an array containing the constants of this enum class, in the order they are declared.
    Returns:
      an array containing the constants of this enum class, in the order they are declared

  - ### valueOf

    public static NestingKind valueOf(String name)
    Returns the enum constant of this class with the specified name. The string must match exactly an identifier used to declare an enum constant in this class. (Extraneous whitespace characters are not permitted.)
    Parameters:
      `name` - the name of the enum constant to be returned.
    Returns:
      the enum constant with the specified name
    Throws:
      `IllegalArgumentException` - if this enum class has no constant with the specified name
      `NullPointerException` - if the argument is null

  - ### isNested

    public boolean isNested()
    Does this constant correspond to a nested type element? A nested type element is any that is not top-level. More specifically, an inner type element is any nested type element that is not static.
    Returns:
      whether or not the constant is nested
    See Java Language Specification:
      14.3 Local Class Declarations