1.1 From Iterating to Stream Operations1.2 Stream Creation1.3 The filter, map, and flatMap Methods1.4 Extracting Substreams and Combining Streams1.5 Other Stream Transformations1.6 Simple Reductions1.7 The Optional Type1.8 Collecting Results1.9 Collecting into Maps1.10 Grouping and Partitioning1.11 Downstream Collectors1.12 Reduction Operations1.13 Primitive Type Streams1.14 Parallel Streams