src/main/java/io/reactivex/Observable.java
@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <T> Observable<T> fromIterable(Iterable<? extends T> source) {
        ObjectHelper.requireNonNull(source, "source is null");
        return RxJavaPlugins.onAssembly(new ObservableFromIterable<T>(source));
    }
@CheckReturnValue
    @NonNull
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <T> Observable<T> fromIterable(Iterable<? extends T> source) {
        ObjectHelper.requireNonNull(source, "source is null");
        return RxJavaPlugins.onAssembly(new ObservableFromIterable<T>(source));
    }
@ CheckReturnValue @ NonNull @ SchedulerSupport ( SchedulerSupport . NONE ) public static < T > Observable < T > fromIterable ( Iterable < ? extends T > source ) { ObjectHelper . requireNonNull ( source , "source is null" ) ; return RxJavaPlugins . onAssembly ( new ObservableFromIterable < T > ( source ) ) ; }
Converts an {@link Iterable} sequence into an ObservableSource that emits the items in the sequence.
<p>
<img width="640" height="186" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/fromIterable.png" alt="">
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code fromIterable} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@param source
the source {@link Iterable} sequence
@param <T>
the type of items in the {@link Iterable} sequence and the type of items to be emitted by the
resulting ObservableSource
@return an Observable that emits each item in the source {@link Iterable} sequence
@see <a href="http://reactivex.io/documentation/operators/from.html">ReactiveX operators documentation: From</a>
Converts an { @link Iterable } sequence into an ObservableSource that emits the items in the sequence . <p > <img width = 640 height = 186 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / fromIterable . png alt = > <dl > <dt > <b > Scheduler : < / b > < / dt > <dd > { @code fromIterable } does not operate by default on a particular { @link Scheduler } . < / dd > < / dl >