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Roel Spilker
84 lines
3.4 KiB
HTML
84 lines
3.4 KiB
HTML
<!DOCTYPE html>
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<html><head>
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<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
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<link rel="shortcut icon" href="../../favicon.ico" type="image/x-icon" />
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<meta name="description" content="Spice up your java" />
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<title>EXPERIMENTAL – @var</title>
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</head><body><div id="pepper">
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<div class="minimumHeight"></div>
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<div class="meat">
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<div class="header"><a href="../../index.html">Project Lombok</a></div>
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<h1>@var</h1>
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<div class="byline">Modifiable local variables with a type inferred by assigning value.</div>
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<div class="since">
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<h3>Since</h3>
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<p>
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@var was introduced as experimental feature in lombok v1.16.12.
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</p>
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</div>
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<div class="experimental">
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<h3>Experimental</h3>
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<p>
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Experimental because:
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<ul>
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<li>This feature is very controversial.</li>
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<li>There is <a href="http://openjdk.java.net/jeps/286">JEP 286</a> that should make the @var obsolete.</li>
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</ul>Current status: <em>uncertain</em> - Currently we feel this feature cannot move out of experimental status.
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</div>
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<div class="overview">
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<h3>Overview</h3>
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<p>
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The <code>@var</code> has the same mission as the <a href="../val.html">@val</a> annotation but modifable.
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</p>
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</div>
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<div class="snippets">
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<div class="pre">
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<h3>With Lombok</h3>
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<div class="snippet">@HTML_PRE@</div>
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</div>
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<div class="sep"></div>
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<div class="post">
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<h3>Vanilla Java</h3>
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<div class="snippet">@HTML_POST@</div>
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</div>
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</div>
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<div style="clear: left;"></div>
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<div class="overview confKeys">
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<h3>Supported configuration keys:</h3>
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<dl>
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<dt><code>lombok.val.flagUsage</code> = [<code>allow</code>] (default: not set)</dt>
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<dd><strong>Lombok will flag any usage of <code>var</code> as an error if not configured.</strong></dd>
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</dl>
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</div>
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<div class="overview">
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<h3>Small print</h3><div class="smallprint">
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<p>
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For compound types, the most common superclass is inferred, not any shared interfaces. For example, <code>bool ? new HashSet() : new ArrayList()</code>
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is an expression with a compound type: The result is both <code>AbstractCollection</code> as well as <code>Serializable</code>. The type inferred will be
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<code>AbstractCollection</code>, as that is a class, whereas <code>Serializable</code> is an interface.
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</p><p>
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In ambiguous cases, <code>java.lang.Object</code> is inferred.
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</p>
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</div>
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</div>
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<div class="footer">
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<a href="index.html">Back to experimental features</a> | <span class="disabled">Previous feature</span> | <a href="Accessors.html">Next feature (@Accessors)</a><br />
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<a href="../../credits.html" class="creditsLink">credits</a> | <span class="copyright">Copyright © 2009-2016 The Project Lombok Authors, licensed under the <a href="http://www.opensource.org/licenses/mit-license.php">MIT license</a>.</span>
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