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Life Beyond Java 8 (July 2020)

Life Beyond Java 8 (July 2020)

Wasn’t Java 8 a fantastic update to the language? Lambdas and streams were a huge change and have helped to improve Java developers’ productivity and introduce some functional ideas to the language. Then came Java 9… and although the module system is really interesting for certain types of applications, the lack of exciting language features and uncertainty around how painful it might be to migrate to Java 9 left many applications taking a wait-and-see approach, happy with Java 8.

But now Java has a new version every six months, and suddenly Java 14 is here. We’re all still on Java 8, wondering whether we should move to a later version, which one to choose, and how painful it might be to upgrade.

In this session we’ll look at:

- Why upgrade from Java 8, including language features from Java 9-14
- What sorts of issues might we run into if we do choose to upgrade
- How the support and license changes that came in with Java 11 might impact us.

Trisha Gee

July 10, 2020

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  1. IntelliJ IDEA ©JetBrains. All rights reserved Life Beyond Java 8

    Trisha Gee (@trisha_gee)
 Developer Advocate & Java Champion, JetBrains
  2. https://www.jetbrains.com/lp/devecosystem-2020/java/ Despite the emergence of newer versions, Java 8 is

    still most beloved. It is used by 3/4 of Java developers. Java 11 is growing more popular. Compared to last year, its usage has increased by 10 percentage points.
  3. var

  4. New Methods on Stream API items.stream()
 .takeWhile(user !-> user.count() <

 .forEach(user !-> position.incrementAndGet());

  5. • Project Amber • Valhalla • Loom • More Garbage

    Collection improvements • Proposed New Project: Leyden And in the future?
  6. • Java 9: JEP 248: G1 the Default GC •

    Java 10: JEP 307: Parallel Full GC for G1 • Java 11: JEP 318: Epsilon (Experimental) • Java 11: JEP 333: ZGC (Experimental) Garbage Collection (Java 11)
  7. • Java 12: Shenandoah (Experimental) • Java 12: More Updates

    to G1 • Java 12: More Improvements to ZGC • Java 13: ZGC: Uncommit Unused Memory • Java 14: ZGC on macOS and Windows • Java 14: Deprecate the ParallelScavenge + SerialOld GC Combination Garbage Collection (Java 14)
  8. There are two upgrade options To Java 11 (LTS) or

    to Java 14 (upgrade every 6 months)