Chapter 19.1, Problem 19.1CP

Program Plan Intro

Class:

• A class defines the characteristics and behavior of an object.
• Any concept implemented in a java program is encapsulated within a class.
• It defines the number of variables and methods of objects that share common characteristics.

Interface:

• Interface is a reference type in Java, which contains a collection of abstract methods.
• An interface needs to follow certain conditions such as:
  • One cannot instantiate an interface.
  • Interfaces do not contain any constructors.
  • All methods present in the interface are abstracts.
  • An interface does not contain an instance field.