1. Class: The class is a blueprint (plan) of the instance of a class (object). It can be defined as a template that describes the data and behavior associated with its instance.
Example: Blueprint of the house is class.
2. Object: The object is an instance of a class. It is an entity that has behavior and state.
Example: A car is an object whose states are: brand, color, and number plate.
Behavior: Running on the road.
3. Method: The behavior of an object is the method.
Example: The fuel indicator indicates the amount of fuel left in the car.
4. Instance variables: Every object has its own unique set of instance variables. The state of an object is generally created by the values that are assigned to these instance variables.
Example: Steps to compile and run a java program in a console
javac GFG.java
java GFG
javac GFG.java java GFG
public class GFG { public static void main(String[] args) { System.out.println("GFG!"); } }
