Getting started with eclipse-plugin – Installation or Setup

Assuming you have Eclipse IDE for Java Developers installed, start Eclipse, click "Help" -> "Install New Software…"

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Select "–All Available Sites–" at "Work with:", and navigate to "Eclipse Plugin Development Tools".
Select "Eclipse Plug-in Development Environment" by ticking the checkbox in front of it.

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Click "Next" to let Eclipse check for any dependencies needed. Click "Next" again to start the installation.

Once that has finished, restart Eclipse.

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Getting started with eclipse-plugin – Installation or Setup - CodeDay