The document discusses the transition to a post Java 8 world highlighting changes in release frequency, licensing, and support durations for Oracle JDK and OpenJDK. It outlines the pros and cons of the new Java updates, potential migration issues, and deprecated modules from Java EE. It also emphasizes the importance of adapting to new features and considering alternative JDKs while migrating applications.

1. Living in post Java 8
world
Oleksandr Navka
GlobalLogic

2. What is post Java 8 world?

7. What is post Java 8 world?
● 2 releases per year
→ March and September
● Changes in license agreement
→ Oracle JDK not for free
● Changes in support
→ 3 years support for Oracle JDK and 6 month support for OpenJDK

9. Pros and cons of new Java
Pros:
● Frequent releases
● Small updates
● Fast feedback
Cons:
● OpenJDK support only for 6 month
● Endless migration on new version

10. Java support

11. Java support
Oracle JDK - 3 years for LTS version (not free)
OpenJDK - 6 month (free)

12. Alternative JDK

13. Alternative JDK Java 8 support
IBM Apr 2022
Azul Mar 2026
RedHat Jun 2023
Amazon Corretto Jun 2023

14. Migration problems

15. Removal Of Java EE Modules
javax.activation
javax.activity
javax.rmi
javax.rmi.CORBA
org.omg.*
javax.transaction
javax.xml.bind.*
javax.jws
javax.jws.soap
javax.xml.soap
javax.xml.ws.*
javax.annotation

16. sun.misc.Unsafe
● Deprecated
● Try to use VarHandle

17. Bytecode operation libraries
ASM (7.0)
Byte Buddy (1.9.0)
cglib (3.2.8)
Javassist (3.23.1-GA)

18. The most popular Java frameworks
Spring (5.1)
Hibernate (5.3.3+)

19. Build tools
Maven: 3.5.0
compiler plugin: 3.8.0
surefire and failsafe: 2.22.0
Gradle: 4.7

20. New features

21. Java new features
Shebang
JShell
G1 and Shenandoah GC
var keyword
HTTP/2
Java Async HTTP client
Streams/Optional APIs

22. Summary
Oracle change license agreement -> move to Open JDK
Find JDK with suitable support
Try to migrate to Java 11 or 12 step - by - step