/docs/api/java/util/concurrent/Future.html?is-external=true#get()" title="class or interface in java.util.concurrent"><CODE>Future.get()</CODE></A> and <A HREF="http://docs.oracle.com/javase/7/docs/api/java/util/concurrent/Future.html?is-external=true#get(long, java.util.concurrent.TimeUnit)" title="class or interface in java.util.concurrent"><CODE>Future.get(long, java.util.concurrent.TimeUnit)</CODE></A> must be called
     off of the main thread or they will block forever.
 </p>
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