empty() : OptionalDouble

of(double) : OptionalDouble

getAsDouble() : double

isPresent() : boolean

isEmpty() : boolean

ifPresent(DoubleConsumer) : void

ifPresentOrElse(DoubleConsumer, Runnable) : void

stream() : DoubleStream

orElse(double) : double

orElseGet(DoubleSupplier) : double

orElseThrow() : double

orElseThrow(Supplier) : double

equals(Object) : boolean

hashCode() : int

toString() : String