RunninglVlan/java9-improvements

Java 9 Improvements - Tech.io playground

Java 9 Improvements - Tech.io playground

Adapted 5 articles about Java 9 by IteratrLearning to Tech.io playground, improved code a bit, added missing one, fixed links. List of articles:

1. Stream Improvements in Java 9
2. Collectors Improvements in Java 9
3. Optional Improvements in Java 9
4. Asynchronous timeouts with CompletableFutures in Java 8 and Java 9
5. Collection Factory Methods in Java 9