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

To run Eclipse with Java 9 you need to modify the ‘eclipse.ini’ file in your Eclipse installation and add the line:

--add-modules=java.se.ee

as a line following the -vmargs line in the file. This adds the Java 9 module containing the missing classes.

You can also use

--add-modules=ALL-SYSTEM

See Eclipse Wiki: Configure Eclipse for Java 9.

Eclipse Oxygen.1a (4.7.1a) is due to be released on 11 October (2017) with full Java 9 support.

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