Video and slides synchronized, mp3 and slide download available at URL http://bit.ly/1N3DZti. Trisha Gee builds a Java 8 application live. This application consumes a real-time feed of high velocity data, contains services that make sense of the data, and presents it in a JavaFX dashboard. Along the way, we encounter Java 8 streams, lambdas, new ways of working with collections. Filmed at qconnewyork.com. Trisha Gee has developed Java applications for a range of industries, including finance, manufacturing, technology, open source and non-profit, for companies of all sizes. She has expertise in Java high performance systems, and is passionate about enabling developer productivity.

1. Java 8 in Anger
Trisha Gee
Developer & Technical Advocate, JetBrains
#QConNewYork

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Watch the video with slide
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/java8-examples

3. Presented at QCon New York
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Purpose of QCon
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Strategy
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- held in 9 cities worldwide

4. •java.lang and java.util Packages
•Parallel Array Sorting
•Standard Encoding and Decoding Base64
•Unsigned Arithmetic Support
•JDBC
•The JDBC-ODBC Bridge has been removed.
•JDBC 4.2 introduces new features.
•Java DB
•JDK 8 includes Java DB 10.10.
•Networking
•The class java.net.URLPermission has been added.
•In the class java.net.HttpURLConnection, if a security manager is installed, calls that request to open a connection require
permission.
•Concurrency
•Classes and interfaces have been added to the java.util.concurrent package.
•Methods have been added to the java.util.concurrent.ConcurrentHashMap class to support aggregate operations based on the
newly added streams facility and lambda expressions.
•Classes have been added to the java.util.concurrent.atomic package to support scalable updatable variables.
•Methods have been added to the java.util.concurrent.ForkJoinPool class to support a common pool.
•The java.util.concurrent.locks.StampedLock class has been added to provide a capability-based lock with three modes for
controlling read/write access.
•Java XML - JAXP
•HotSpot
•Hardware intrinsics were added to use Advanced Encryption Standard (AES). The UseAESand UseAESIntrinsics flags are available to
enable the hardware-based AES intrinsics for Intel hardware. The hardware must be 2010 or newer Westmere hardware. For example, to
enable hardware AES, use the following flags:
-XX:+UseAES -XX:+UseAESIntrinsics
To disable hardware AES use the following flags:
-XX:-UseAES -XX:-UseAESIntrinsics
•Removal of PermGen.
•Default Methods in the Java Programming Language are supported by the byte code instructions for method invocation.
•Java Mission Control 5.3 Release Notes
•JDK 8 includes Java Mission Control 5.3.
Java 8 has many new features

5. Lambda Expressions

6. (…and Streams)

7. Real World Application

8. Twitter Dashboard

10. Play Along
https://github.com/trishagee/sense

11. Leader board: Top Tweeters

12. Twitter Leaderboard

13. Twitter Leaderboard

14. Twitter Leaderboard

15. Mood: Happy, Sad or Both?

16. Overall Mood

17. Overall Mood

18. Overall Mood

19. Mood: Are We Getting Happier?

20. Happiness Over Time

21. Happiness Over Time

22. Tweet Service: Publishing Real
Twitter Data

23. Real Tweet Data

24. User Service: Extracting the
Twitter Handle

25. User Service

26. Mood Service: Figuring Out the
Tweet Mood

27. Mood Service

28. Now, Fraught With Danger…

29. Really Real Data

30. What have we learnt?

31. What have we learnt?
•How to use Streams to manipulate data
•Where Lambdas might simplify your code
•Basics of building a JavaFX UI

32. Resources
http://bit.ly/Java8InAnger

33. Questions?
@trisha_gee
http://bit.ly/Java8InAnger

34. Watch the video with slide synchronization on
InfoQ.com!
http://www.infoq.com/presentations/java8-
examples