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<div class="subTitle">edu.emory.mathcs.backport.java.util.concurrent</div>
<h2 title="Interface Callable" class="title">Interface Callable</h2>
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<pre>public interface <span class="strong">Callable</span></pre>
<div class="block">A task that returns a result and may throw an exception.
Implementors define a single method with no arguments called
<tt>call</tt>.
<p>The <tt>Callable</tt> interface is similar to <code>Runnable</code>, in that both are designed for classes whose
instances are potentially executed by another thread. A
<tt>Runnable</tt>, however, does not return a result and cannot
throw a checked exception.
<p> The <a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/Executors.html" title="class in edu.emory.mathcs.backport.java.util.concurrent"><code>Executors</code></a> class contains utility methods to
convert from other common forms to <tt>Callable</tt> classes.</div>
<dl><dt><span class="strong">Since:</span></dt>
<dd>1.5</dd>
<dt><span class="strong">Author:</span></dt>
<dd>Doug Lea</dd>
<dt><span class="strong">See Also:</span></dt><dd><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/Executor.html" title="interface in edu.emory.mathcs.backport.java.util.concurrent"><code>Executor</code></a></dd></dl>
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<td class="colFirst"><code>java.lang.Object</code></td>
<td class="colLast"><code><strong><a href="../../../../../../../edu/emory/mathcs/backport/java/util/concurrent/Callable.html#call()">call</a></strong>()</code>
<div class="block">Computes a result, or throws an exception if unable to do so.</div>
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<h4>call</h4>
<pre>java.lang.Object call()
throws java.lang.Exception</pre>
<div class="block">Computes a result, or throws an exception if unable to do so.</div>
<dl><dt><span class="strong">Returns:</span></dt><dd>computed result</dd>
<dt><span class="strong">Throws:</span></dt>
<dd><code>java.lang.Exception</code> - if unable to compute a result</dd></dl>
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