Why Won't Eclipse Oxygen Start Due to Java Annotation Errors?

Why won't eclipse oxygen start (for the first time)? [duplicate]

Problem: Eclipse Oxygen fails to launch, throwing a Java class not found exception related to the javax.annotation.PostConstruct and javax.annotation.PreDestroy annotations.

Answer:

To resolve this issue when using Eclipse Oxygen with Java 9, you need to modify the eclipse.ini file located in your Eclipse installation directory. Add the following line after the -vmargs line:

--add-modules=java.se.ee

This line ensures that the Java 9 module containing the missing classes is added to your Eclipse installation. Alternatively, you can use the following line:

--add-modules=ALL-SYSTEM

Additional Notes:

• Eclipse Oxygen.1a (4.7.1a) is scheduled for release on October 11, 2017, with full Java 9 support.
• If you encounter the error after the modification, try deleting the configuration folder within your Eclipse workspace and restarting Eclipse.

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