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8006895: Clarify that FunctionalInferface is only informative

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Reviewed-by: briangoetz
This commit is contained in:
Joe Darcy 2013-01-24 16:54:11 -08:00
parent 546eee6d15
commit 3807bcee8b
1 changed files with 9 additions and 4 deletions
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13
jdk/src/share/classes/java/lang/FunctionalInterface.java
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -28,9 +28,9 @@ package java.lang;
import java.lang.annotation.*;
/**
* Indicates that an interface type declaration is intended to be a
* <i>functional interface</i> as defined by the Java Language
* Specification.
* An informative annotation type used to indicate that an interface
* type declaration is intended to be a <i>functional interface</i> as
* defined by the Java Language Specification.
*
* Conceptually, a functional interface has exactly one abstract
* method. Since {@linkplain java.lang.reflect.Method#isDefault()
@ -52,6 +52,11 @@ import java.lang.annotation.*;
* <li> The annotated type satisfies the requirements of a functional interface.
* </ul>
*
* <p>However, the compiler will treat any interface meeting the
* definition of a functional interface as a functional interface
* regardless of whether or not a {@code FunctionalInterface}
* annotation is present on the interface declaration.
*
* @jls 4.3.2. The Class Object
* @jls 9.8 Functional Interfaces
* @jls 9.4.3 Interface Method Body