ElementType (Java 2 Platform SE 5.0) - JDK 5 Documentation v1.5.0, Java 2 SDK 英文文档

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Java^TM 2 Platform
Standard Ed. 5.0

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java.lang.annotation
Enum ElementType

java.lang.Object
  java.lang.Enum<ElementType>
      java.lang.annotation.ElementType

All Implemented Interfaces:: Serializable, Comparable<ElementType>

public enum ElementType
extends Enum<ElementType>
extends Enum<ElementType>

A program element type. The constants of this enumerated type provide a simple classification of the declared elements in a Java program.

These constants are used with the Target meta-annotation type to specify where it is legal to use an annotation type.

Since:: 1.5

Enum Constant Summary

ANNOTATION_TYPE
          Annotation type declaration

CONSTRUCTOR
          Constructor declaration

FIELD
          Field declaration (inlcudes enum constants)

LOCAL_VARIABLE
          Local variable declaration

METHOD
          Method declaration

PACKAGE
          Package declaration

PARAMETER
          Parameter declaration

TYPE
          Class, interface (including annotation type), or enum declaration

Method Summary

static ElementType valueOf(String name)
          Returns the enum constant of this type with the specified name.

static ElementType[] values()
          Returns an array containing the constants of this enum type, in the order they're declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

finalize, getClass, notify, notifyAll, wait, wait, wait

Enum Constant Summary
`ANNOTATION_TYPE` Annotation type declaration
`CONSTRUCTOR` Constructor declaration
`FIELD` Field declaration (inlcudes enum constants)
`LOCAL_VARIABLE` Local variable declaration
`METHOD` Method declaration
`PACKAGE` Package declaration
`PARAMETER` Parameter declaration
`TYPE` Class, interface (including annotation type), or enum declaration

Method Summary
`static ElementType`	`valueOf(String name)` Returns the enum constant of this type with the specified name.
`static ElementType[]`	`values()` Returns an array containing the constants of this enum type, in the order they're declared.

Methods inherited from class java.lang.Enum
`clone, compareTo, equals, getDeclaringClass, hashCode, name, ordinal, toString, valueOf`

Methods inherited from class java.lang.Object
`finalize, getClass, notify, notifyAll, wait, wait, wait`

Enum Constant Detail

TYPE

public static final ElementType TYPE

Class, interface (including annotation type), or enum declaration

FIELD

public static final ElementType FIELD

Field declaration (inlcudes enum constants)

METHOD

public static final ElementType METHOD

Method declaration

PARAMETER

public static final ElementType PARAMETER

Parameter declaration

CONSTRUCTOR

public static final ElementType CONSTRUCTOR

Constructor declaration

LOCAL_VARIABLE

public static final ElementType LOCAL_VARIABLE

Local variable declaration

ANNOTATION_TYPE

public static final ElementType ANNOTATION_TYPE

Annotation type declaration

PACKAGE

public static final ElementType PACKAGE

Package declaration

Method Detail

values

public static final ElementType[] values()

Returns an array containing the constants of this enum type, in the order they're declared. This method may be used to iterate over the constants as follows:

for(ElementType c : ElementType.values())
        System.out.println(c);

Returns:: an array containing the constants of this enum type, in the order they're declared

valueOf

public static ElementType valueOf(String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (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 type has no constant with the specified name