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<#import "_features.html" as f>
<@f.scaffold title="var" logline="Mutably! Hassle-free local variables.">
<@f.history>
<p><ul>
<li><code>var</code> was promoted to the main package in lombok 2.0.0; given that <a href="http://openjdk.java.net/jeps/286">JEP 286</a> establishes expectations, and lombok's take on <code>var</code> follows these, we've decided to promote <code>var</code> eventhough the feature remains controversial.</li>
<li><code>var</code> was introduced in lombok 1.16.12 as experimental feature.</li>
</ul></p>
</@f.history>
<@f.overview>
<p>
<code>var</code> works exactly like <a href="/features/val"><code>val</code></a>, except the local variable is <em>not</em> marked as <code>final</code>.
</p><p>
The type is still entirely derived from the mandatory initializer expression, and any further assignments, while now legal (because the variable is no longer <code>final</code>), aren't looked at to determine the appropriate type.<br />
For example, <code>var x = "Hello"; x = Color.RED;</code> does <em>not</em> work; the type of x will be inferred to be <code>java.lang.String</code> and thus, the <code>x = Color.RED</code> assignment will fail. If the type of <code>x</code> was inferred to be <code>java.lang.Object</code> this code would have compiled, but that's not how<code>var</code> works.
</p>
</@f.overview>
<@f.confKeys>
<dt>
<code>lombok.var.flagUsage</code> = [<code>warning</code> | <code>error</code>] (default: not set)
</dt><dd>
Lombok will flag any usage of <code>var</code> as a warning or error if configured.
</dd>
</@f.confKeys>
</@f.scaffold>
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