Java's I/O streams provide standardized ways to read and write data. Any object representing a mutable data source in Java exposes methods for reading and writing its data as a stream.

An extensible terminal operation, Stream::collect, also is featured, enabling the output of a pipeline to be summarized in multiple ways. Use of streams in the Java ecosystem now is pervasive.

A preview feature in Java is one that is not yet added permanently even though its design, specification, and implementation are complete. Presently Java has quite a few preview features in the ...