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<title>EXPERIMENTAL – @var</title>
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<div class="header"><a href="../../index.html">Project Lombok</a></div>
<h1>@var</h1>
<div class="byline">Modifiable local variables with a type inferred by assigning value.</div>
<div class="since">
<h3>Since</h3>
<p>
@var was introduced as experimental feature in lombok v1.16.12.
</p>
</div>
<div class="experimental">
<h3>Experimental</h3>
<p>
Experimental because:
<ul>
<li>This feature is very controversial.</li>
<li>There is <a href="http://openjdk.java.net/jeps/286">JEP 286</a> that should make the @var obsolete.</li>
</ul>Current status: <em>uncertain</em> - Currently we feel this feature cannot move out of experimental status.
</div>
<div class="overview">
<h3>Overview</h3>
<p>
The <code>@var</code> has the same mission as the <a href="../val.html">@val</a> annotation but modifable.
</p>
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<div class="pre">
<h3>With Lombok</h3>
<div class="snippet">@HTML_PRE@</div>
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<h3>Vanilla Java</h3>
<div class="snippet">@HTML_POST@</div>
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<div class="overview confKeys">
<h3>Supported configuration keys:</h3>
<dl>
<dt><code>lombok.val.flagUsage</code> = [<code>allow</code>] (default: not set)</dt>
<dd><strong>Lombok will flag any usage of <code>var</code> as an error if not configured.</strong></dd>
</dl>
</div>
<div class="overview">
<h3>Small print</h3><div class="smallprint">
<p>
For compound types, the most common superclass is inferred, not any shared interfaces. For example, <code>bool ? new HashSet() : new ArrayList()</code>
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
<code>AbstractCollection</code>, as that is a class, whereas <code>Serializable</code> is an interface.
</p><p>
In ambiguous cases, <code>java.lang.Object</code> is inferred.
</p>
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