Java 8 provides lots of great features. Though, not every project can be upgraded. In this case, Guava is the right chose for you. In this talk, I will show you some tips about writing simpler and cleaner code using Guava

1. Tips you need to know about
Guava for simpler and cleaner
code without JAVA 8
黃俊喬（Kosmos Banking）

2. About Woody
• 黃俊喬 woody.huang@kosmossystems.com
• Worked @ Academia Sinica
• Worked @ B&S Link
• Worked @ HTC
• Work @ Kosmos Banking
• Sample code in Github: https://goo.gl/iVWBiy

3. Tip 1 Optional – prior to Java 8

4. Tip 1 Optional – Guava
• Optional in Java 8

5. Functional Programming
• Function can be used as input parameter or return value:
• Map: Determines the output based on an input value
• Filter: Determines a true or false value for a given input
• Reduce: Processes (using a combiner) a list of elements and generates the
return value [Guava doesn’t support for the sake of readability]

6. Tip 2 Predicate<T> - prior to Java 8

7. Tip 2 Predicate<T> - Guava
• Predicate in Java 8

8. Tip 3 Function<F,T> - Guava
• Function in Java 8

9. Tip 4 FluentIterable - prior to Java 8

10. Tip 4 FluentIterable - Guava
• stream in Java 8

11. Tip 5 MultiMap - prior to Java 8

12. Tip 5 MultiMap - Guava
• stream collector in Java 8

13. Tip 6 Ordering<T> - prior to Java 8

14. Tip 6 Ordering<T> - Guava
• Ordering in Java 8

15. Tip 7 ComparisonChain - Guava
• Comparator.thenComparing in Java 8

16. Tip 8 ListenableFuture - prior to Java 8

17. Tip 8 ListenableFuture - Guava
• CompletableFuture in Java 8

18. Questions & Discussion

19. Thank You