This could be an arguable point, but in short, if we take from google's guideline, using underscore like nimbl3_test is not something that is encouraged
Package names are all lowercase, with consecutive words simply concatenated together (no underscores). For example, com.example.deepspace, not com.example.deepSpace or com.example.deep_space.
You may find also the guideline from Oracle to allow this practice, but notice that it should be a special case for that domain name.
This could be an arguable point, but in short, if we take from google's guideline, using
underscore
likenimbl3_test
is not something that is encouragedYou may find also the guideline from Oracle to allow this practice, but notice that it should be a special case for that domain name.