1 /*
2  * Written by Doug Lea with assistance from members of JCP JSR-166
3  * Expert Group and released to the public domain, as explained at
4  * http://creativecommons.org/publicdomain/zero/1.0/
5  */
6 
7 package java.util.concurrent;
8 
9 /**
10  * A {@link ScheduledFuture} that is {@link Runnable}. Successful
11  * execution of the {@code run} method causes completion of the
12  * {@code Future} and allows access to its results.
13  * @see FutureTask
14  * @see Executor
15  * @since 1.6
16  * @author Doug Lea
17  * @param <V> The result type returned by this Future's {@code get} method
18  */
19 public interface RunnableScheduledFuture<V> extends RunnableFuture<V>, ScheduledFuture<V> {
20 
21     /**
22      * Returns true if this is a periodic task. A periodic task may
23      * re-run according to some schedule. A non-periodic task can be
24      * run only once.
25      *
26      * @return true if this task is periodic
27      */
isPeriodic()28     boolean isPeriodic();
29 }
30