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JDK8 Stream api
- 1. Streams API
- 2. Outline Introduction What are Streams ? Stream Definition Streams VS Collections External vs Internal Iterations Stream Operations
- 3. Introduction Collections is heavily used API in Java SELECT name FROM dishes WHERE calorie < 400 List<String> filteredDishes = new ArrayList<String>(); For(int I =0;I < dishes.size(); i++) { if(dishes.get(i).getCalories ()< 400) { filteredDishes .add(dishes.get(i).getName()); } }
- 4. What are Streams ? Declarative Parallel Execution Chain Of Operations
- 5. Stream Definition Sequence of elements Source Data processing operations – Map, Filter, Reduce, Find, Match, Sort, Limit etc. Pipelining Internal Operations
- 6. Streams VS Collections Collections are eager and Streams are lazy Traversable only once External vs Internal Iterations
- 7. External vs Internal Iterations Demo
- 8. Stream Operations Intermediate Operations Map limit Filter Distinct Sort etc. Terminal Operations Collect Count Foreach
Editor's Notes
- Streams is an update to java API to manipulate collections in declarative way.
- 1. Collections are about data; streams are about computations.