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NetBeans JDK9 Branch Development Build Readme

This development build of NetBeans IDE from jdk9 branch is a prototype work prepared to support JDK9 namely its modular system (project jigsaw). It is intended for early adopters of Java 9. NetBeans JDK9 build is distributed just as Java SE NetBeans distribution and JDK9 Early access build is recognized as Java Platform by NetBeans.


NetBeans JDK9 branch build runs on top of Java SE 8, you can download latest update of Java SE 8 here. JDK 7 and older is not supported by this build of NetBeans.

Download latest JDK 9 Early access build from JDK 9 project snapshots page. Then add it in as Java Platform in NetBeans JDK9 build in Tools | Java Platforms | Add Platform. Later it can be selected in NetBeans Project Properties dialog > Libraries | Java Platform.

Running NetBeans JDK9 build on JDK9 EA build

NetBeans JDK9 build runs on JDK9 EA build (build 68 from Jun 10, 2015) for now. This can change in the future when JDK9 EA builds will introduce more changes which will require significant updates to NetBeans code to run NetBeans on top of JDK9. NetBeans development is committed to fully support JDK9 in NetBeans release planned after JDK9 Feature Complete. This NetBeans release is TBD and will fully support JDK9 GA bits.

NetBeans JDK9 branch build Downloads

Download NetBeans JDK9 branch build

What works

NetBeans JDK9 build supports:

  • Java SE projects
  • JavaFX projects
  • NetBeans Ant project
  • Maven projects
  • Debugging
  • Profiling of JDK9 VM from NetBeans JDK9 build
  • All Editing features work
  • All other features unrelated to Java language like SCM work.

Javac used

NetBeans JDK9 build uses JDK 9 Javac. In current builds of javac there are no limitations except it compiles only java sources with -source option 1.6 and higher. Source level 1.5 and older is not supported by JDK9 javac.

JDK Project for NetBeans

NetBeans JDK9 build features also JDK Project for NetBeans plugin on its Plugin portal. This plugin is provided for Java 9 development to simplify JDK project setup in NetBeans JDK9 build.

Bug reporting

NetBeans JDK9 branch build is in very early stage of development and JDK9 is also before its Feature complete. Therefore it is possible to encounter instabilities, some features might not be working when JDK9 is used as Java Platform for you projects. Please provide us feedback on the build either using Bugzilla reports use JDK_9 keyword to mark bugs found when using JDK9 build. Or you can email us on nbusers mailing list, put [JDK9] into Subject of your email.

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