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Editorial Team
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Editorial Team
Asked: June 17, 20262026-06-17T06:24:27+00:00 2026-06-17T06:24:27+00:00

I have an application already developed in Eclipse 3.7, but as Eclipse 4.0 Juno

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I have an application already developed in Eclipse 3.7, but as Eclipse 4.0 Juno is out I would like to port my RCP application to Juno.

Could someone tell me how to do this?

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  1. Editorial Team
    Editorial Team
    2026-06-17T06:24:28+00:00Added an answer on June 17, 2026 at 6:24 am

    Since Eclipse 4.x the API for Eclipse based application is completely changed. The new API is created as the Eclipse e4 project. It is not backwards compatible.

    You have two choices:

    1. use the legacy plugins to be able to still run the old Eclispe 3.x plugins/applications. It is able to support some of the new and the old APIs. And your application might still run, albeit less efficient.

    2. Rewrite your application (at least the UI part) using the new Eclipse e4 API. The Eclipse e4 API is not yet fully defined and might change in the future. So converting your application and keep it up-to-date with future e4 API changes requires quite some effort.

    A very nice tutorial about Eclispe e4 is written by Lars Vogel, it will show you the basics of the new API. Furthermore, check the e4 tag on StackOverflow of course!

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