What does “Can be package local” mean? (IDEA Inspection)

Question

I used IntelliJ for \"Inspect Code\", and one of its results is:

  Problem synopsis      Can be package local (at line 18(public class HeartBeat))

Answer 1

If you want to suppress this warning:

1. Go to Preferences -> Editor -> Inspections
2. Go to Java -> Declaration redundancy
3. Select "Declaration access can be weaker"
4. Uncheck the "Suggest package local visibility..." checkboxes on the right

EDIT: in the latest IDEA release step 4 this looks to have changed to "Suggest package-private visibility level for ..." and includes several options for various conditions