OOP in Java

	Object Oriented Programming (OOP) = programming methodology to model (usually real world) objects
	Each object has:
		a state represented by the values of a set of data (in the form of a struct) E.g., for a TV object some components of the state are power on/off, volume 1-10, Mute on/off, channel setting, etc.
		behaviors represented by functional methods E.g., for a TV, there would be an power on method, an adjust volume method, a change channel method, etc.
	Each object sends and receives messages.
	Classes are used in Java to implement objects