Open the Available Software Sites preference page.To always enable major upgrades of your IDE once and for all: Performing a full relaunch should display the new version number. Note that the start splash screen may be cached and will not necessarily be updated to the latest version after the IDE is restarted.Otherwise, read carefully the error message to find out which component is conflicting and establish your resolution strategy. If updates are found, proceed through the install wizard and restart the IDE when prompted.Enter the URL of the new repository (for example, ).Window > Preferences > Install/Update > Available Software Sites.You first need to add the new release's repository as follows:.To upgrade Eclipse IDE to the next major release Upgrading existing Eclipse IDE and Installed Features to newer release 6.3 Upgrading from Europa (3.3) and below.6.1 Upgrading from previous versions to Neon (4.6) is NOT supported.3 Beta-testing milestones and release candidates.1 Upgrading existing Eclipse IDE and Installed Features to newer release.I pointed the p2 installer at the Java 9 Beta software site and installed both features (one is the feature and the other is the corresponding source code). I launched Eclipse and opened the p2 installer using the Help > Install new software.
Note that this change occurs before the -vmargs line. I made a small change to the eclipse.ini file to make the new configuration run using the Java 9 runtime. I downloaded the Eclipse SDK 4.6 (Neon) M2 from the Eclipse Platform downloads and decompressed it into its own directory. I downloaded the early access version of Java 9 JDK from in the form of a tar.gz file that I decompressed into a local directory: /home/apps/jdk1.9.0.
It’s a work-in-progress, but certainly shows that progress is being made. I’ll admit to a certain amount of shame that it’s taken me this long to try out the Beta Java™ 9 support in Eclipse. Update: Note that as of October 11/2017, Java 9 is 100% supported “out of the box” by Eclipse IDE, Oxygen Edition Java 9 can be used to run your Eclipse IDE, Oxygen Edition, and can be used to build Java 9 applications without additional configuration.
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