intellij - cleanup code

Question

I was wondering whether intellij has a feature that would allow it to scan through files and perform things such as organising imports, safely deleting unused functions and fields etc. This feature was very helpful in .NET in Resharper plugin. Thanks for any pointers.

Answer 1

Use Analyze | Inspect Code with the corresponding options enabled to find unused code, in the results you can apply the fix to all the occurrences at once removing all the unused methods and fields.

Use Code | Reformat Code or Optimize Imports for the rest. Reformat Code has an option to optimize imports and you can run it on the whole project to do both operations globally in a single step.

It's also possible to optimize imports on the fly (enabled in Settings) and reformat/optimize imports when committing to the version control. Code inspections can be also executed before the commit to notify you about possible problems.

Answer 2

There is a plugin for IDEA - FindBugs-IDEA. It scans for cases you listed and a lot more.

Answer 3

You can try it out using the trial.

As to the imports, yes, you can Organize Imports ctrl-alt-o, and you can choose to do so on the current file or on every file in the project.

Not sure if you can delete all unused methods in a project, but you do get warnings regarding methods/variables that aren't used and can be safely deleted (and IntelliJ does offer the option to safely delete).

Also, in the Preferences, you can setup a ton of things that you choose to be considered as warnings, depending on your coding style, conventions, etc.