Week 4

Question 1

What is a package?

Answer 1

A package is a bundle of package.

Question 2

How does a class use a package?

Answer 2

For a class that is created within a package, the package must be delcared in the class.

package PackageName; // Declares the package

Question 3

How does one implement a package?

Answer 3

For a class within a different package, the package one wants to implement must be imported. One can also import a specific class within the package.

import PackageName; // imports the specified package
import PackageName.ClassName; // Imports the specific class within a package

Question 4

What are the different types of access for a package and how restricitve are they?

Answer 4

Protected:
* memmbers/methods are accessible for the classes and subclasses within the package

Private:
* members/methods are accessible only within the same class

No specifier:
* members/methods are accessible only to classes in the same package, not subclasses

Public:
* members/methods are accessible everywhere

Question 5

What are collections?

Answer 5

Collections are containers that groups items in a single unit.