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Whats new in Java 9,10,11,12
The document outlines the evolution of Java versions from Java SE 5 to Java 12, detailing release schedules, features, and long-term support policies. It highlights the transition to a time-based release model, the introduction of module systems, and the open sourcing efforts of Oracle's JDK versus OpenJDK. Additionally, it discusses the implications for developers regarding updates, features, contracts, and compatibility across different Java versions.
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Whats new in Java 9,10,11,12
- 1. Java 9, 10,11, 12… @rorypreddy
- 2. "Moving Java ForwardFaster" 20191995 1998 2001 2004 2007 2010 20222016 2014-03-18 2013-06-12 Java EE 7 2011-07-28 Java EE6 2009-12-10 2006-12-11 Java EE5 2006-05-11 2004-10-04 J2EE 1.4 2003-11-11 2002-02-06 J2EE 1.3 2001-09-24 2000-05-08 J2EE 1.2 1999-12-12 1998-12-08 JPE Java Professional Edition 1998-05 1997-02-19 Java JDK Alpha- Beta 1995 2010-01-27 Java1 Java1.1 Java1.2 Java 1.3 Java 1.4 Java5 Java SE 6 Java SE7 Java SE8 JDK 1.0 JDK 1.1 J2SE 1.2 J2SE 1.3 J2SE 1.4 J2SE 5.0 Oak Playground Kestrel Merlin Tiger Mustang Dolphin Spider Java EE 8 2017-09-21 2013 1996-01-23 2017-09-21 2018-03-20 2018-09-25 2019-03 2019-09 2020-03 2020-09 2021-03 2021-09 Jakarta EE Eclipse Foundation
- 3. OpenJDK (New) ReleaseModel • New Features included (only) when ready • Feature release versions released twice a year • Update releases will ship quarterly • Long-term support (LTS) feature release every three years • Time-Based Release Versioning
- 4. JDK Version Numbering •$FEATURE.$INTERIM.$UPDATE.$PATCH • $FEATURE is incremented every six months • $INTERIM is always zero, reserved for flexibility and future use • $UPDATE is incremented one month after $FEATURE is incremented, and every three months thereafter • $PATCH is emergency patch-release counter
- 5. Available JDKs • OracleJDK www.oracle.com/technetwork/java/javase/downloads/ • Many OpenJDKs: • Oracle OpenJDK jdk.java.net/11/ • Azul's Zulu OpenJDK www.azul.com/downloads/zulu/ • AdoptOpenJDK's OpenJDK adoptopenjdk.net • AdoptOpenJDK's OpenJDK based on OpenJ9 adoptopenjdk.net • RedHat's OpenJDK • SAP's SapMachine OpenJDK • Other Linux distribution's OpenJDKs
- 6. Demystifying "Free" Java •$free as in free beer (cost) vs free as in free speech (what can you do) • For $free use OpenJDK binaries • For free use OpenJDK with GPLv2+CE license • Updates refers to code patches – typically $free • Support means fixing bugs and answering questions – was never $free
- 7. Oracle's JDK is(not) "free" • LTS release every 3 years – does not mean 3 years of free updates • Oracle JDK 11 (and onward) can only be used in production with commercial Java SE subscription • Oracle JDK 8 can be used indefinitely for free • Oracle will lead and contribute to each new JDK (every 6 months)
- 8. Open Sourcing andConverged Binaries • Goal: No functional difference between OpenJDK and Oracle JDK in JDK 11 • Open sourcing closed-source parts of JDK • Flight recorder • Mission control • … • Removing some closed-source parts • Browser Plugin • Java Web Start • JavaFX • Backwards Compatibility – applications depending on Java SE should work
- 9. Converged Binaries Up toJDK 10 Oracle JDK OpenJDK Java SE JDK 11 and later OpenJDK & Oracle JDK Java SE
- 10. (Long Term) Support •Long Term Support (LTS) for all releases is not practical • One Long Term Support release every three years • Starting with JDK 11 (September 2018), then JDK 17 (September 2021), then JDK 23… • For Oracle's commercial customers updates available for at least three years or longer • JDK 9 – supported until March 2018 (release of JDK10) • JDK 10 – supported until September 2018 (release of JDK 11) • JDK 11 (September 2018) – free support until March 2019 (or 2022 commercial) • JDK 12 (March 2019) …
- 11. JDK 9 –old news? • Java Platform Module System (JPMS) • All core Java libraries become modules • 97 modules • Most internal APIs encapsulated • No more classpath hell • Not widely adopted as yet
- 12. JDK 10 • JEPsincluded • 286: Local-Variable Type Inference • 296: Consolidate the JDK Forest into a Single Repository • 304: Garbage-Collector Interface • 307: Parallel Full GC for G1 • 310: Application Class-Data Sharing • 312: Thread-Local Handshakes • 313: Remove the Native-Header Generation Tool (javah) • 314: Additional Unicode Language-Tag Extensions • 316: Heap Allocation on Alternative Memory Devices • 317: Experimental Java-Based JIT Compiler • 319: Root Certificates • 322: Time-Based Release Versioning
- 13. JDK 11 • JEPsincluded • 181: Nest-Based Access Control • 309: Dynamic Class-File Constants • 315: Improve Aarch64 Intrinsics • 318: Epsilon: A No-Op Garbage Collector • 320: Remove the Java EE and CORBA Modules • 321: HTTP Client (Standard) • 323: Local-Variable Syntax for Lambda Parameters • 324: Key Agreement with Curve25519 and Curve448 • 327: Unicode 10 • 328: Flight Recorder • 329: ChaCha20 and Poly1305 Cryptographic Algorithms • 330: Launch Single-File Source-Code Programs • 331: Low-Overhead Heap Profiling • 332: Transport Layer Security (TLS) 1.3 • 333: ZGC: A Scalable Low-Latency Garbage Collector • 335: Deprecate the Nashorn JavaScript Engine • 336: Deprecate the Pack200 Tools and API
- 14. //New Implicitly TypedJava 11+ Syntax BiFunction<Double, Integer, Double> f3 = (var x, var y) -> x/y; BiFunction<Double, Integer, Double> f4 = (@NotNull var x, @NotNull var y) -> x / y; Double j = 3.; Integer i = 2; System.out.println(f4.apply(j, i)); Local-Variable Syntax for Lambda Parameters BiFunction<Double, Integer, Double> f3 = (Double x, Integer y) -> x/y; Double j = 3.; Integer i = 2; System.out.println(f4.apply(j, i));
- 15. Launch Single-File Source-CodePrograms • Run a program supplied as a single file of Java source code java -classpath /home/foo/java Hello.java Bonjour • is equivalent to: javac -classpath /home/foo/java Hello.java java -classpath /home/foo/java Hello Bonjour
- 16. JDK 12 • JDK12 is currently in Public Review • 2018/05 • 2018/07 • 2018/10 - 2018/11 • 2019/01 - 2019/02 • 2019/03 Expert Group formation Early Draft Review Public Review Proposed Final Draft Final Release • JEPs targeted to JDK 12, so far: • 230: Microbenchmark Suite • 325: Switch Expression enhacements • 326: Raw String Literals • 340: One AArch64 Port, Not Two • 341: Default CDS Archives • Schedule:
- 17. Backwards Compatibility • Itwill be respected • But with no guarantees • New version may include breaking changes • Anything for removal will be deprecated first • Minimum of one release warning (6+ months)
- 18. Container Awareness andJava Jakarta EE • JVM more Docker container aware • Uses container CPU count and memory size • Open sourcing Java EE • Jakarta EE as a part of Eclipse Foundation • Jakarta EE – Code first, then spec! • Feed ideas back into Jakarta EE
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- 21. Q4 2016 Q2 2017 Q3 2017 Q1 2018 MP v. 1.3 MP v. 1.2 Moveto MP v. 1.1 Q2 2018 MP v. 1.4 & 2.0 Q3 2018 MP v. 2.1 Eclipse MicroProfile
- 22. Is Java really"Moving Forward Faster"? • Much more frequent Java releases • Faster access to new features • Many new improvement ideas • A lot of maintenance and housekeeping • Java remains free
- 23. FROM panga/openjdk-alpine:11-jdk asbuilder RUN jlink --add-modules java.sql,java.naming,java.management,java.instrument,java.security.jgss,java.desktop,jdk.unsupported --verbose --strip-debug --compress 2 --no-header-files --no-man-pages --output /opt/jre-minimal FROM alpine:3.8 COPY --from=builder /opt/jre-minimal /opt/jre-minimal ENV LANG=C.UTF-8 PATH=${PATH}:/opt/jre-minimal/bin ADD modules /opt/app/modules ARG JVM_OPTS ENV JVM_OPTS=${JVM_OPTS} CMD java ${JVM_OPTS} --add-opens java.base/java.lang=spring.core,javassist --module-path /opt/app/modules --module spring.petclinic https://github.com/roryp/spring-petclinic