How does javac automatically compile dependencies of a class

Question

Given the following directory structure:

/top
   |--- wrk
          |--- pkg
                  |--- A.java
                  |--- B.java

As

Answer 1

The compiler has to either find and successfully compile a source for B, or find a .class for B even if it's just an import. As opposed to loading, which is done dynamically.

Look in your output directory and you'll see that B has been compiled as well. It will be compiled even if in a different package, but you'll have to make it public to reference it from A.