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Download; Getting Started; Members. I'm using Eclipse Java Oxygen, version 3a, release 4.7.3a. It reverted my eclipse from photon to oxygen and locks.

• Installing (for Python) Python and Java should be installed before installing Eclipse. Unzip eclipse-committers-oxygen-R-win32.zip, the file that you just downloaded and moved. On my machine (running Windows 7), I can Right-click the file.
• Download Oxygen XML Developer. Download the fully functional Oxygen XML Developer. We recommend using Eclipse 4.4 on these systems. Java SE 8 from.

I desperately try to get Eclipse Oxygen to run Java 9 on Mac OSX, but I somehow seem to fail.

Steps I have done so far:

• Installed the Java 9 JDK in /Library/Java/JavaVirtualMachines/jdk-9.jdk (next to the already installed /Library/Java/JavaVirtualMachines/jdk1.8.0_144.jdk)

• Installed the 'Java 9 Support (BETA) for Oxygen 4.7' plugin from the Eclipse market place (I have Oxygen 4.7 for Java EE Developers installed)

• Added the line '--add-modules=java.se.ee' after the -vmargs line in eclipse.ini (as suggested here: With java 9 ea, Eclipse fails to install and show error 'An error has occurred, see the log file null') to avoid startup problems

• Set the Compiler compliance level in the settings to '9 (BETA)'

• Added the Java 9 SDK to the installed JREs and made it the default choice

Now, at the startup of my program, I print out all the System.getProperty() values. And I get for example

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• java.runtime.version: 1.8.0_144-b01

• java.specification.version: 1.8

• java.vm.specification.version: 1.8

• java.version: 1.8.0_144

Why?! What else is there to do to tell Eclipse that it shall for gods sake not use Java 8 but Java 9?

One reason I need Java 9 is the new security feature OCSP Stapling for TLS (see https://docs.oracle.com/javase/9/security/java-pki-programmers-guide.htm#JSSEC-unique_4307382).

There is the system property 'jdk.tls.server.enableStatusRequestExtension' which, when currently queried, returns 'null', but it should return 'false' with Java 9:

I hope you can help me here.

2 Answers

To run your program using Java 9 do the following:

Open the Preferences and go to 'Java > Installed JREs'. Add the Java 9 JDK if it is missing.

In the Properties for the Java project select the 'Java Build Path' entry and choose the 'Libraries' tab. Edit the 'JRE System Library' entry and choose the Java 9 JDK or a Java 9 Execution environment.

You also need to look at the 'Run Configuration' for your program ('Run > Run Configurations'). Check that JRE setting is 'Project execution environment' or a Java 9 JDK / Execution environment.

After installing Java 9, these steps worked for me:

• Right Click On the project and select “Configure Build path”
• Select the 'Libraries' tab at the top. If jre8 is still there, select it and press Remove from the tabs on the right.
• Select “Add Library” and then “JRE System Library” the Select jre9.
• Confirm that 'Execution Environment is using JRE9 as shown in the picture
• Apply and close

After doing that check the eclipse.ini fil at ~eclipsejee-oxygeneclipseeclipse.ini and make sure there is no -vm option there. If it is, delete the entire option and the JRE path i.e:-vm. C:/Program Files/Java/jre1.8.0_151/bin. This will cause Eclipse to figure out the Java version to use.

Not the answer you're looking for? Browse other questions tagged macosjava-9eclipse-oxygen or ask your own question.

eclipse.ini is the configuration file used to control the Eclipse startup. We can configure Eclipse VM arguments such as JDK to be used (eclipse.ini vm), permgen space, maximum and minimum heap size using Xms, Xmx parameters.

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• 2 eclipse.ini vm argument

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eclipe.ini File Location

For windows, it’s in the same directory as eclipse.exe file, as shown in below image.

For Mac OS X, it’s found inside the app. So if Eclipse app is in Downloads directory, eclipse.ini file location will be:

You can reach this location by first right clicking on Eclipse app and click on “Show Package Contents” and then in the next window navigate to Contents/Eclipse directory, as shown in below images.

Here is the example eclipse.ini file from my default eclipse installation.

Some important points about eclipse.ini file are:

1. Each line before -vmargs contains an option followed by the value for option.
2. All the lines after -vmargs are passed as JVM arguments, so all options and arguments for eclipse startup must be specified before -vmargs. For example -vm settings for JDK to be used.
3. –launcher.XXMaxPermSize specifies the maximum permgen space to use by eclipse launcher, increase this value if your eclipse startup is failing with out of memory error.
4. If you are getting Out of Memory errors, you should try to increase Permgen space and maximum heap space values. They are configured using VM arguments -XX:MaxPermSize, -Xms and -Xmx. Permgen space default value is configured as 256MB that is good for small to medium projects.

eclipse.ini vm argument

eclipse.ini vm argument is useful when you have multiple JDK installation and you want to make sure that your eclipse runs on a specific JVM, rather than picking system configured jdk path. It must be defined before -vmargs.

eclipse.ini vm argument Mac

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My eclipse.ini file snippet showing -vm argument usage to configure eclipse to use JDK8 in Mac OS X.

You can configure it similarly for Windows or Linux operating systems. Just change the JDK bin directory path accordingly.

eclipse.ini Permgen Space

If you are getting java.lang.OutOfMemoryError: PermGen space error, mostly when you are working on larger code base, doing maven update for large projects etc. , then you should increase Permgen space. Below is the configuration to increase permgen space to 512 MB in eclipse.ini file.

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Note that there is no more Permgen space from Java 8 onwards, so setting this option will have no effect. However you will also not get out of memory error because of permgen space.

eclipse.ini Heap Space

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If you are getting OutOfMemoryError related to Heap space, then you can try to increase the maximum heap size available to eclipse. You can easily do it by editing -Xmx value. For example, below snippet will increase the eclipse heap size to 2 GB.

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That’s all for a quick roundup on eclipse.ini configuration and VM arguments.