Java Info in Q&A

Important points highlighted in BOLD:

• 1. Real-world objects contain state and behavior.

  2. A software object's state is stored in fields.

  3. A software object's behavior is exposed through methods.

  4. Hiding internal data from the outside world, and accessing it only through publicly exposed methods is known as data encapsulation.

  5. A blueprint for a software object is called a class.

  6. Common behavior can be defined in a superclass and inherited into a subclass using the extends keyword.

  7. A collection of methods with no implementation is called an interface.

  8. A namespace that organizes classes and interfaces by functionality is called a package.

1. The term API stands for Application Programming Interface.