In order to be able to see the source for a particular plug-in, it needs to be installed. This is achieved using the same installation dialog that has been covered previously in this book.
Go to Help | Install New Software and choose the repository that is associated with the release of Eclipse that is being used:
Ensure that the Group items by category checkbox is deselected. This will show all plug-ins, not just the main ones. Typically the source plug-ins are not shown in the main listing. In addition, deselecting this checkbox will result in a faster search in the next step.
Optionally deselect the Hide items that are already installed checkbox. This will ensure that the plug-ins show up even if they are already installed.
Search for
source
in the search box. This will result in a set of plug-ins being shown: