nl_tokens: Returns a Flowable that emits a { @code 0L } after the { @code initialDelay } and ever - increasing numbers after each { @code period } of time thereafter on a specified { @link Scheduler } . <p > <img width = 640 height = 200 src = https : // raw . github . com / wiki / ReactiveX / RxJava / images / rx - operators / timer . ps . png alt = > <dl > <dt > <b > Backpressure : < / b > < / dt > <dd > The operator generates values based on time and ignores downstream backpressure which may lead to { @code MissingBackpressureException } at some point in the chain . Consumers should consider applying one of the { @code onBackpressureXXX } operators as well . < / dd > <dt > <b > Scheduler : < / b > < / dt > <dd > You specify which { @link Scheduler } this operator will use . < / dd > < / dl >
pl_tokens: @ CheckReturnValue @ NonNull @ BackpressureSupport ( BackpressureKind . ERROR ) @ SchedulerSupport ( SchedulerSupport . CUSTOM ) public static Flowable < Long > interval ( long initialDelay , long period , TimeUnit unit , Scheduler scheduler ) { ObjectHelper . requireNonNull ( unit , "unit is null" ) ; ObjectHelper . requireNonNull ( scheduler , "scheduler is null" ) ; return RxJavaPlugins . onAssembly ( new FlowableInterval ( Math . <mask> ( 0L , initialDelay ) , Math . max ( 0L , period ) , unit , scheduler ) ) ; }