Indicates the API declaration in question is associated with a preview feature. See JEP 12: "Preview Language and VM Features" (https://openjdk.org/jeps/12). Note this internal annotation is handled specially by the javac compiler. To work properly with --release older-release, it requires special handling in make/langtools/src/classes/build/tools/symbolgenerator/CreateSymbols.java and src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/ClassReader.java.

Nested and Inner Type Summary

Modifier and Type	Class and Description
public static enum	PreviewFeature.Feature Enum of preview features in the current release.
public static @interface	PreviewFeature.JEP Annotation identifying the JEP associated with a preview feature.

Method Summary

Modifier and Type	Method and Description
public PreviewFeature.Feature	feature() Name of the preview feature the annotated API is associated with.
public boolean	reflective()

Inherited from java.lang.annotation.Annotation:: annotationType equals hashCode toString

Method Detail

feature	back to summary
public PreviewFeature.Feature feature() Name of the preview feature the annotated API is associated with.

reflective	back to summary
public boolean reflective()

jdk.internal.javac back to summary

public final Enum PreviewFeature.Feature

Class Inheritance

extends Enum<PreviewFeature.Feature>

java.lang.Object
java.lang.Enum
jdk.internal.javac.PreviewFeature.Feature

Enum of preview features in the current release. Values should be annotated with the feature's JEP.

Field Summary

Modifier and Type	Field and Description
public static final PreviewFeature.Feature	LANGUAGE_MODEL
public static final PreviewFeature.Feature	LAZY_CONSTANTS
public static final PreviewFeature.Feature	PEM_API
public static final PreviewFeature.Feature	STRUCTURED_CONCURRENCY
public static final PreviewFeature.Feature	TEST A key for testing.

Constructor Summary

Access	Constructor and Description
private	Feature()

Method Summary

Modifier and Type	Method and Description
public static PreviewFeature.Feature	valueOf(String name)
public static PreviewFeature.Feature[]	values()

Inherited from java.lang.Enum:: clone compareTo describeConstable equals finalize getDeclaringClass hashCode name ordinal toString valueOf

Field Detail

LANGUAGE_MODEL	back to summary
public static final PreviewFeature.Feature LANGUAGE_MODEL

LAZY_CONSTANTS	back to summary
public static final PreviewFeature.Feature LAZY_CONSTANTS Annotations @JEP number:531 title:Lazy Constants status:Third Preview

PEM_API	back to summary
public static final PreviewFeature.Feature PEM_API Annotations @JEP number:538 title:PEM Encodings of Cryptographic Objects status:Third Preview

STRUCTURED_CONCURRENCY	back to summary
public static final PreviewFeature.Feature STRUCTURED_CONCURRENCY Annotations @JEP number:533 title:Structured Concurrency status:Seventh Preview

TEST	back to summary
public static final PreviewFeature.Feature TEST A key for testing. Annotations @JEP number:2147483647 title:Test Feature

Constructor Detail

Feature	back to summary
private Feature()

Method Detail

valueOf	back to summary
public static PreviewFeature.Feature valueOf(String name)

values	back to summary
public static PreviewFeature.Feature[] values()

jdk.internal.javac back to summary

public @Interface PreviewFeature.JEP

Annotations

extends Annotation

@Target:FIELD
@Retention:CLASS

Annotation identifying the JEP associated with a preview feature.

Method Summary

Modifier and Type	Method and Description
public int	number() JEP number
public String	status() JEP status such as "Preview", "Second Preview", etc
public String	title() JEP title in plain text

Inherited from java.lang.annotation.Annotation:: annotationType equals hashCode toString

Method Detail

number	back to summary
public int number() JEP number

status	back to summary
public String status() JEP status such as "Preview", "Second Preview", etc

title	back to summary
public String title() JEP title in plain text