@CheckReturnValue
    @SchedulerSupport(SchedulerSupport.NONE)
    public static <T> Single<T> just(final T item) {
        ObjectHelper.requireNonNull(item, "value is null");
        return RxJavaPlugins.onAssembly(new SingleJust<T>(item));
    }
@ CheckReturnValue @ SchedulerSupport ( SchedulerSupport . NONE ) public static < T > Single < T > just ( final T item ) { ObjectHelper . requireNonNull ( item , "value is null" ) ; return RxJavaPlugins . onAssembly ( new SingleJust < T > ( item ) ) ; }
Returns a {@code Single} that emits a specified item.
<p>
<img width="640" height="310" src="https://raw.github.com/wiki/ReactiveX/RxJava/images/rx-operators/Single.just.png" alt="">
<p>
To convert any object into a {@code Single} that emits that object, pass that object into the
{@code just} method.
<dl>
<dt><b>Scheduler:</b></dt>
<dd>{@code just} does not operate by default on a particular {@link Scheduler}.</dd>
</dl>

@param item
the item to emit
@param <T>
the type of that item
@return a {@code Single} that emits {@code item}
@see <a href="http://reactivex.io/documentation/operators/just.html">ReactiveX operators documentation: Just</a>