In a previous Java 101 tutorial, you learned how to better organize your code by declaring reference types (also known as classes and interfaces) as members of other reference types and blocks.

The Javadoc documentation for the Package class states: Package objects contain version information about the implementation and specification of a Java package. This versioning information is ...

It's only the code itself—not the "how-to" instructions ... and each method a chapter out of a how-to book. "As to the 37 packages, the Java and Android libraries are organized in the same ...