Please explain - What is package?

Question

Java Package

Answer 1

Packages are a bunch of classes.
Built in ones are those classes that you cannot modify/see, but able to use. They are already built for you. They can also be derived from API packages.
User Defined classes are those classes you create for yourself. You can see, modify and access/use them freely.

Answer 2

Package is a container of classes where it helps us to reuse the code. By default we reuse the java classes.