src/main/java/io/reactivex/Observable.java
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Observable<T> repeat() {
        return repeat(Long.MAX_VALUE);
    }
@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Observable<T> repeat() {
        return repeat(Long.MAX_VALUE);
    }
@ CheckReturnValue @ SchedulerSupport ( SchedulerSupport . NONE ) public final Observable < T > repeat ( ) { return repeat ( Long . MAX_VALUE ) ; }
Returns an Observable that repeats the sequence of items emitted by the source ObservableSource indefinitely.
<p>
<img width="640" height="287" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/repeatInf.o.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code repeat} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@return an Observable that emits the items emitted by the source ObservableSource repeatedly and in sequence
@see <a href="http://reactivex.io/documentation/operators/repeat.html">ReactiveX operators documentation: Repeat</a>
Returns an Observable that repeats the sequence of items emitted by the source ObservableSource indefinitely . <p > <img width = 640 height = 287 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / repeatInf . o . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code repeat } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >