CS6501 IP Notes, Internet Programming Lecture Notes – CSE 5th SEM Anna University


Anna University Regulation 2013 Computer Science & Engineering (CSE) CS6501 IP Notes for all 5 units are provided below. Download link for CSE 5th SEM CS6501 Internet Programming Lecture Notes are listed down for students to make perfect utilization and score maximum marks with our study materials.


Introduction to java

Java is an Object-Oriented Language. As a language that has the Object Oriented feature, Java supports the following fundamental concepts:

  • Polymorphism
  • Inheritance
  • Encapsulation
  • Abstraction
  • Classes
  • Objects
  • Instance
  • Method
  • Message Parsing

In this chapter, we will look into the concepts Classes and Objects.

  • Object – Objects have states and behaviors. Example: A dog has states – color, name, breed as well as behaviors -wagging, barking, eating. An object is an instance of a class.
  • Class – A class can be defined as a template/blue print that describes the behaviors/states that object of its type support.

Objects in Java:

Let us now look deep into what are objects. If we consider the real-world we can find many objects around us, Cars, Dogs, Humans, etc. All these objects have a state and behavior.

If we consider a dog, then its state is – name, breed, color, and the behavior is – barking, wagging, running.

If you compare the software object with a real world object, they have very similar characteristics.

Software objects also have a state and behavior. A software object’s state is stored in fields and behavior is shown via methods.

So in software development, methods operate on the internal state of an object and the object-toobject communication is done via methods.

Classes in Java:

A class is a blue print from which individual objects are created.

A sample of a class is given below:

public class Dog{

String breed;

int age;

String color;

void barking(){


void hungry(){


void sleeping(){



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