The Stream API

The Stream API is your best tool to process your in-memory data following a map/filter/reduce approach.

The tutorials in this series are listed below. They will guide you all through the Stream API, starting at the basic concepts all the way to collector design and parallel streams.

1. Processing Data in Memory Using the Stream API
   

   Implementing the map-filter-reduce algorithm

2. Adding Intermediate Operations on a Stream
   

   Deep-diving into the intermediate operations of the Stream API.

3. Creating Streams
   

   Patterns to create the stream you need.

4. Reducing a Stream
   

   Reducing streams with a binary operator.

5. Adding a Terminal Operation on a Stream
   

   Reducing a stream without the reduce method.

6. Finding the Characteristics of a Stream
   

   Understanding the characteristics of a stream

7. Using a Collector as a Terminal Operation
   

   Collecting a stream in a mutable container using a collector.

8. Creating Your Own Collector
   

   Creating a collector by using the Collectors factory class.

9. Implementing the Collector Interface
   

   Creating a collector by implementing the Collector interface.

10. Using Optionals
    

    Introducing the Optional class to model method that cannot produce a value.

11. Parallelizing Streams
    

    Going faster by leveraging the parallel streams.

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