Java Reference
In-Depth Information
It is not generic and the
run() method does not re-
turn any value.
It is generic and the call() method
of a Callable<V> instance returns a
value of type V .
The run() method cannot
throw checked exception.
The call() method can throw
checked exception.
• The following code demonstrates how to define a task that will run re-
ports asynchronously:
public class
ReportGeneratorTask implements
public String call()
throws Exception {
//generate report
return "The report was
generated successfully";
• The following code shows us how to submit a task. We can see that
the submit() method of the ManagedExecutorService instance
returns an object of type Future that will get back the result of the
running task when it becomes available:
Future<String> monitor =
Search WWH ::

Custom Search