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I see many blog posts mention a Streams class and I see it was once part of the lambda branch API. It appears to be non-public API now and it does not match the previous implementation. Is there a different way to do Streams.concat() or to append multiple values to a stream?
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Java 8 offers the possibility to create streams out of three primitive types: int, long and double. As Stream<T> is a generic interface, and there is no way to use primitives as a type parameter with generics, three new special interfaces were created: IntStream, LongStream, DoubleStream.
Java provides a new additional package in Java 8 called java. util. stream. This package consists of classes, interfaces and enum to allows functional-style operations on the elements. You can use stream by importing java.
Introduced in Java 8, the Stream API is used to process collections of objects. A stream is a sequence of objects that supports various methods which can be pipelined to produce the desired result.
With Java 8, Collection interface has two methods to generate a Stream. stream() − Returns a sequential stream considering collection as its source. parallelStream() − Returns a parallel Stream considering collection as its source.
The Streams class got split and some of its methods were moved to StreamSupport, which does not contain a concat method in the latest build. The rationale for the split is explained here.
The specific case of concat has been mentioned separately in this post where it was proposed for removal and was apparently removed.
However a later post seems to indicate that it will reappear in future builds.
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