Using the Stream API
A stream in Java is a sequence of functional definitions or scripts that work as a pipelined operation, wherein each of these definitions outputs another stream, creating a flow of stream operations expected to provide an end result. A stream is an outcome of a certain combination of functional interfaces, code reduction, and some lambda operations. It is also the first major attempt towards parallelizing some transactions in Java using internal multithreading. This recipe will highlight how to create Java streams from List, Set, and arrays of data.
Getting started
Open the same project ch06 and let us add service classes that will show us how to start creating java.util.stream.Stream from the given EmployeeDao transactions and test data.
How to do it...
There are few ways to create Java stream objects from a typical collection or array data store. To use the Stream API, do the following steps:
- Let us create an experimental service class,
EmployeeStreamService, which consists...
