Once upon a time in the C++ century, the Great King of Sun said people need Duke, The PDA (a medieval version of a tablet). He picked his bravest knights – Naughton, Sheriden and Gosling – and entrusted them a secret mission to travel the universe in search for a perfect language that Duke can use. After three years of a dangerous journey in a world of bits, bytes and memory leakages, on an Asian isle they found it. Java made of Oak has been discovered. When they returned the King was not in power anymore. New world was ruled by a mysterious organisation, World Wide Web. Our brave knights honoured it with the glorious Java. And the world became perfect… Mani and Rafal will take your through an exciting story of great programmers, multi-billion company wars, and - most importantly – language features. The history of Java, from its inception till just about today.

1. History of Java
From its inception till about now...
bit.ly/1e3yqGS

2. Who are we ?
Mani Sarkar @theNeomatrix369
Rafal Wicha @rafalwicha
#historyofjavaparty

3. Disclaimer
Ideas and opinions expressed here are only ours
and you can certainly NOT hold us to it. YMMV.
We’ve done our best to summarise more than 23
years of Java’s history.
And FYI Java is the best platform ever!

4. Agenda
● Java roots
● Platform evolution
● Open source
● People!

5. © James Gosling 1990

6. Patrick Naughton
© James Gosling 1990

7. Patrick Naughton
Scott McNealy
© James Gosling 1990

8. James Gosling
Patrick Naughton
© James Gosling 1990

9. Green Project
Menlo Park, California
© Google Maps 1991

10. Duke here...
...and here
1992

11. The Internet
1993-95

12. Bill Joy
1993-95
Eric Schmidt

13. Marc Andreessen
1995

14. Marc Andreessen
1995

15. Marc Andreessen
1995

16. © Google Maps
Menlo Park, California

17. © Google Maps
Oak maybe?

18. Silk
DNA
NetProse WebDancer
1995

19. Silk
DNA
NetProse WebDancer
1995

20. Silk
DNA
NetProse WebDancer
1995

21. May 1995
ALPHA

22. Jan 1996

23. JDK 1
● safe & secure
● distributed & robust
● interpreted, garbage collected
● multi-threaded
● architecture neutral
● high performance
Gosling’s goals for Java
1996

24. Different implementations of Java
JRocket IcedTea ChaiVM Zing Dalvik
SAPJVM OJVM IKVM.NET Zulu
CloudVM-for-Java Harmony JBuilder
Visual-Cafe Microsoft-JVM JavaOS
Java-Chip LLVM Visual-J++
Java CVM HotSpot J9 Classic-JVM
1995-2014

25. Different implementations & misunderstanding
Sun-Microsoft misunderstanding
Java CVM HotSpot
Microsoft-JVM
Visual-J++
Windows
Internet Explorer
1997

26. JDK 1.1
● inner classes f(x) = new Fun() { apply(x) { x * x }}
● JavaBeans
● JDBC
● RMI
● reflection
● JIT (Microsoft VM)
1997

27. J2SE 1.2 (Playground)
● Sun’s JIT virtual machine
● Swing
● Collections
Joshua Bloch
Doug Lea
1998

28. J2SE?
● Java 2 Platform, Standard Edition
● Java 2 Platform, Enterprise Edition
● Java 2 Platform, Micro Edition
1998

29. J2SE 1.3 (Kestrel)
HotSpot
2000

30. J2SE 1.4 (Merlin)
● regular expressions
● exception chaining
● NIO
2002

31. J2SE 5.0 (Tiger)
● generics
● annotations
● autoboxing
● enums
● varargs
● for each
● static imports
2004

32. Philip Wadler Martin Odersky Gilad Bracha Dave Stoutamire
2004

33. J2SE 5.0 - java.util.concurrent
● executors
● concurrent collections
● atomic variables
● synchronisers
● new lock variants
2004 Brian Goetz Doug Lea

34. JSE 6 (Mustang)
improvements & bug fixes
performance improvements
OpenJDK was partially
released (javac, HotSpot)
2006

35. Sun-Apache difficulty over TCK
2006

36. OpenJDK was fully released
(rest of the components)
2007

37. 2007-2010
NULL
(pausing, and thinking….)

38. Java goes to Oracle
IBM willing to acquire Sun
Oracle acquires Sun
Oracle adopts OpenJDK
2010

39. Another misunderstanding
Google vs Oracle misunderstandings
2010

40. JSE 7 (Dolphin) 2011
● invokedynamic (JRuby, Groovy)
● strings in switch, try-with-resources,
diamond operator (<>), multi-catch
● ForkJoin
OpenJDK is the reference implementation

41. OpenJDK history...
2006 2007 2010 Beyond
Rest of
OpenJDK
is released Oracle
Sun
launches
OpenJDK
(javac,
Hotspot)
adopts
OpenJDK
(Sun is
acquired)
2011 2012 2014
Lambdas,
Nashorn &
Adopt
OpenJDK
OpenJDK:
Reference
implementation
of Java 7 SE
Java 10
Java 8
Java 9
World-wide
Community
involvement

42. LJC & other Java communities
LJC, SOUJava and other java communities world-wide collaborate to help improve Java!
London Java Community wins the Duke’s Choice award at JavaOne 2012,
contributions through the the Adopt OpenJDK and Adopt-a-JSR programs lead to it!

43. OpenJDK hackdays...
London Java Community
organises hackdays every month, come along to contribute to the Java ecosystem.
Everyone is welcome, more details on LJC’s Meetup.com page

44. Java 8 (unofficially Spider)

45. Java 8 (unofficially Spider)
Date/Time API

46. Java 8 (unofficially Spider)
Date/Time API
Money/Currency API

47. Java 8 (unofficially Spider)
Date/Time API
Money/Currency API
off-heap objects

48. Java 8 (unofficially Spider)
Date/Time API
Money/Currency API
off-heap objects
new JavaScript runtime

49. Java 8 (unofficially Spider)
Date/Time API
Money/Currency API
off-heap objects
new JavaScript runtime
Project Nashorn

50. Java 8 (unofficially Spider)
Date/Time API
Money/Currency API
off-heap objects
new JavaScript runtime
Project Nashorn
PermGen removed
annotations on Java type
Compact profiles
Generalized Target-Type
Inference

51. Java 8 (unofficially Spider)
Date/Time API
Money/Currency API
off-heap objects
new JavaScript runtime
Project Nashorn
PermGen removed
annotations on Java type
Compact profiles
Generalized Target-Type
Inference Lambdas

52. Source: Oracle, 2011

53. Java touches our lives in
many ways, we just may not
be aware of it,
but Java is everywhere!

54. Summary
● About the creators
● Early excitement & survivors
● Difficulties & misunderstandings
● Minor & major improvements
● Open source & community activities

55. Thanks to...
All the PEOPLE behind the inception &
development of Java from its start.
LJC for supporting the Java spirit in London.
Gamesys and the organisers of this evening event!
But above all you, Java developers!
Feedback at @rafalwicha @theNeomatrix369