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8233795: Consider adding a notion of a Value-based class to API Documentation index

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Reviewed-by: hannesw
This commit is contained in:
Pavel Rappo 2020-01-24 12:51:34 +00:00
parent d97fe7b050
commit abadeda8a5
1 changed files with 26 additions and 2 deletions
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src/java.base/share/classes/java/lang/doc-files/ValueBased.html
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@ -1,11 +1,35 @@
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<html lang="en">
<head>
<title>Value-based Classes</title>
<link rel="stylesheet" type="text/css" href="../../../../stylesheet.css" title="Style">
</head>
<body>
<h1 id="ValueBased">Value-based Classes</h1>
<h1 id="ValueBased">{@index "Value-based Classes"}</h1>
Some classes, such as <code>java.util.Optional</code> and
<code>java.time.LocalDateTime</code>, are <em>value-based</em>. Instances of a
@ -23,7 +47,7 @@ value-based class:
<li>are considered equal solely based on <code>equals()</code>, not
based on reference equality (<code>==</code>);</li>
<li>do not have accessible constructors, but are instead instantiated
through factory methods which make no committment as to the identity
through factory methods which make no commitment as to the identity
of returned instances;</li>
<li>are <em>freely substitutable</em> when equal, meaning that interchanging
any two instances <code>x</code> and <code>y</code> that are equal