src/main/java/io/reactivex/Flowable.java
@CheckReturnValue
    @BackpressureSupport(BackpressureKind.FULL)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<List<T>> buffer(int count) {
        return buffer(count, count);
    }
@CheckReturnValue
    @BackpressureSupport(BackpressureKind.FULL)
    @SchedulerSupport(SchedulerSupport.NONE)
    public final Flowable<List<T>> buffer(int count) {
        return buffer(count, count);
    }
@ CheckReturnValue @ BackpressureSupport ( BackpressureKind . FULL ) @ SchedulerSupport ( SchedulerSupport . NONE ) public final Flowable < List < T > > buffer ( int count ) { return buffer ( count , count ) ; }
Returns a Flowable that emits buffers of items it collects from the source Publisher. The resulting
Publisher emits connected, non-overlapping buffers, each containing {@code count} items. When the source
Publisher completes, the resulting Publisher emits the current buffer and propagates the notification from the
source Publisher. Note that if the source Publisher issues an onError notification the event is passed on
immediately without first emitting the buffer it is in the process of assembling.
<p>
<img width="640" height="320" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/buffer3.png" alt="">
<dl>
<dt><b>Backpressure:</b></dt>
<dd>The operator honors backpressure from downstream and expects the source {@code Publisher} to honor it as
well, although not enforced; violation <em>may</em> lead to {@code MissingBackpressureException} somewhere
downstream.</dd>
<dt><b>Scheduler:</b></dt>
<dd>This version of {@code buffer} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@param count
the maximum number of items in each buffer before it should be emitted
@return a Flowable that emits connected, non-overlapping buffers, each containing at most
{@code count} items from the source Publisher
@see <a href="http://reactivex.io/documentation/operators/buffer.html">ReactiveX operators documentation: Buffer</a>
Returns a Flowable that emits buffers of items it collects from the source Publisher . The resulting Publisher emits connected non - overlapping buffers each containing { @code count } items . When the source Publisher completes the resulting Publisher emits the current buffer and propagates the notification from the source Publisher . Note that if the source Publisher issues an onError notification the event is passed on immediately without first emitting the buffer it is in the process of assembling . <p > <img width = 640 height = 320 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / buffer3 . png alt = > <dl > <dt > <b > Backpressure : < / b > < / dt > <dd > The operator honors backpressure from downstream and expects the source { @code Publisher } to honor it as well although not enforced ; violation <em > may< / em > lead to { @code MissingBackpressureException } somewhere downstream . < / dd > <dt > <b > Scheduler : < / b > < / dt > <dd > This version of { @code buffer } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >