Can you undo 'git reset --hard HEAD' if never having made a commit?

I lost some code after running

git reset --hard HEAD开发者_如何学JAVA

and I never committed the work. Is there any way to get this code back? Was it logged anywhere? Can I undo the command?

Nope, git reset --hard and git checkout -f are both destructive of changes that haven't been committed.

Any uncommitted changes in your working directory ( including staged ) will be lost. That is why you should use it cautiously ( or use other flags like --mixed, --soft)