LINQ/PLINQ are the obvious inspirations for Java 8s stream API. I don't know if they are exactly functionally equivalent but streams bring declarative style programming to Java iterable collections that C# has had for years.

But, don't be confused by the .NET Rx libraries which provide LINQ style methods to observable event streams and have been ported as RxJava. Personally, I think that is a better use of the term streams and find the Java 8 standard streams name confusing.