How to uninstall Eclipse?
Right click on eclipse icon and click on open file location then delete the eclipse folder from drive(Save backup of your eclipse workspace if you want). Also delete eclipse icon. Thats it..
There is no automated uninstaller.
You have to remove Eclipse manually by deleting some directories and files.
Note: I use Unix style paths in this answer but the locations should be the same on Windows or Unix systems, so ~ refers to the user home directory even on Windows.
Why is there no uninstaller?
According to this discussion about uninstalling Eclipse, the reasoning for not providing an uninstaller is that the Eclipse installer is supposed to just automate a few tasks that in the past had to be done manually (like downloading and extracting Eclipse and adding shortcuts), so they also can be undone manually. On Windows there is no entry in "Programs and Features" because the installer does not register installations in the system registry.
How to to locate Eclipse installations
The default installation path is in `~/eclipse/.
The Eclipse installer also keeps track of installations. Launch the installer and then open the "Bundle Pool" dialog (in simple mode it's in the menu - in advanced mode it's a small button next to the bundle pool drop down). You'll see list of "profiles". Double click on a profile to see the path of the installation.
How to quickly uninstall Eclipse
If you have installed Eclipse manually without the Eclipse installer, just delete the Eclipse directory and be done with it.
If you have installed Eclipse with the Eclipse installer, then delete the Eclipse directory and any desktop and start menu shortcuts. Then launch the Eclipse installer and open the "Bundle Pool" dialog and click on "Cleanup Agent" to remove unused bundles. This won't affect other Eclipse installations if you have any.
In my opinion this is generally enough and I would stop here
How to completely uninstall Eclipse
If you really want to remove Eclipse without leaving any traces, you have to manually delete
- all desktop and start menu shortcuts
- all installation directories (e.g.
~/eclipse/photon/) - the p2 bundle pool (which is often shared with other eclipse installations)
The installer has a "Bundle Pools" menu entry which lists the locations of all bundle pools. If you have other Eclipse installations on your system you can use the "Cleanup Agent" to remove unused bundles. If you don't have any other Eclipse installations you can delete the whole bundle pool directory instead (by default ~/p2/).
If you want to completely remove the Eclipse installer too, delete the installer's executable and the ~/.eclipse/ directory.
Depending on what kind of work you did with Eclipse, there can be more directories that you may want to delete. If you used Maven, then ~/.m2/ contains the Maven cache and settings (shared with Maven CLI and other IDEs). If you develop Eclipse plugins, then there might be JUnit workspaces from test runs, next to you Eclipse workspace. Likewise other build tools and development environments used in Eclipse could have created similar directories.
How to delete all projects
If you want to delete your projects and workspace metadata, you have to delete your workspace(s). The default workspace location is ´~/workspace/´. You can also search for the .metadata directory to get all Eclipse workspaces on your machine.
If you are working with Git projects, these are generally not saved in the workspace but in the ~/git/ directory.
Addendum: Windows Registry
Even though Eclipse isn't "installed" like a regular Windows application, there are still a few entries that get written to the system registry. If you search the Registry for "eclipse" you'll likely find some entries for URL handlers named eclipse+command, eclipse+mpc or eclipse+installer. They are used e.g. for letting you install Eclipse plugins from the browser.
On my system I see a few other entries which I believe are created by Windows itself and not by Eclipse (e.g. entries in the list of recently used executables). Whether you want to delete those entries is up to you. Personally I wouldn't, but on the other hand it probably won't break anything if you do. Just be aware that registry "cleaning" is a controversial topic.