src/main/java/io/reactivex/Single.java
@BackpressureSupport(BackpressureKind.FULL)
    @CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<T> repeat() {
        return toFlowable().repeat();
    }
@BackpressureSupport(BackpressureKind.FULL)
    @CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<T> repeat() {
        return toFlowable().repeat();
    }
Repeatedly re-subscribes to the current Single and emits each success value.
<p>
<img width="640" height="457" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/Single.repeat.png" alt="">
<dl>
<dt><b>Backpressure:</b></dt>
<dd>The returned {@code Flowable} honors the backpressure of the downstream consumer.</dd>
<dt><b>Scheduler:</b></dt>
<dd>{@code repeat} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>
@return the new Flowable instance
@since 2.0