Does Eclipse have any cache or the like or settings that can get corrupted

Does Eclipse have any persistent settings (that can get corrupted).

All of sudden my eclipse is doing strange things -- java programs won't run (though I can run t开发者_运维问答hem fine from the command line).

If there is such a things -- how do I purge it?

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Yes, such things can indeed happen (I just had a screwed up workspace because I ran out of disk space).

In the workspace, look for the '.metadata' folder. Tread carefully, but e.g. usually all the plugin-local configs in '.plugins' can safely be removed. You'll just loose some settings.

Hope it helps!

PS: By the way, for your concrete problem, what's the actual error you are getting?