Java Streaming API recipes
In Java, elements in the stream are subdivided into subsets (can be subdivided into further) which are processed in parallel using different cores of the CPU. Therefore, only stateless, non-interfering and associative subsets are eligible to run parallel. These subsets are combined for the short-circuit/terminal process for the final result. The sequential(default) or parallel mode depends on the last used method in the pipeline. Fig.1: Stream Streams API Short-Circuit terminal operations Stream Aggregation Collectors Streams API In the blog post Use of default and static methods , I have introduce how to write a factorial lambda functions using UnaryOperator . You can use the java.util.stream.IntStream.reduce function to calculate the factorial value in the stream as follows. var r =IntStream.range(1, 10).reduce(1,(a,b) -> a*b); Streams handling interfaces: use Java generics. BaseStream - defines core stream behaviours, such as managing the stre...