project

Tilak Education Society
Tilak College of
Arts, Commerce, Science College
Vashi
PROJECT REPORT ON
LIVE CHAT
By
Mr. DNYANRAJ SUBHASH PATIL
Under the Guidance Of
Prof. Mrs.Triveni Kaul
Submitted to
University of Mumbai
2011-2012
DEPARTMENT OF COMPUTER SCIENCE

Tilak Education Society
TILAK COLLEGE OF SCIENCE & COMMERCE
Plot no. 231 Sector-28,Vashi, Navi Mumbai-400 705

This is to certify that the project of

Live Chat Application

Undertaken at

TILAK COLLEGE OF SCIENCE & COMMERCE

By

MR.DNYANRAJ SUBHASH PATIL (Seat o._____________).

In partial fulfillment of B.Sc. (computer science) degree Examination

had not been submitted for any other courses undergone by the

candidate. It is further certified that they are completed all required

phases of the project.

Internal Examiner Head of Department

External Examiner

ACKNOWLEDGEMENT

Making of project Live Chat Application is been unique experience for
us.

We would like to thanks the entire staff of the Computer
Science department of Tilak College of Science and Commerce, who
kept helping continuously through out our project.

A special thanks to Mr. Rao Ghuge and Mrs. Bhagyashree
Kulkarni and Mrs.Triveni Koul for their valuable guidance,
cooperation and encouragement and time spend for this project
work. Without her help and guidance this project would be
unsuccessful.

Last but not least we would like to thank to my family and
friends for their constant moral support.

Thanking You,

DNYANRAJ SUBHASH PATIL

SIGNED SHEET
Class : T.Y.B.Sc Subject : project

Signed sheet details are as follows (As per Practical)

PHASE COMPLITION SIGN
PHASE
DATE (guide)
NO.

1 Project Finalization

2 Investigation of
system
requirements/Synopsis

3 Data & Process
collection

4 System Design

5 Program Design

6 Program Coding

First phase

Second phase

Third phase

Last phase

7 Unit testing checked
by Guide

8 Integration testing

9 Complete Project

10 Documentation
printout Checking

11 Final Submission

INDEX

Sr.No. Title Page
No.

1 Introduction

2 Gantt Chart

3 Organizational overview

a. Purpose

b. Scope

c. Organization chart

d. Present system

e. Limitations of present system

4 Proposed system

Benefits of proposed system

5 System study

a. System analysis

b. Requirement specification

c. Feasibility study

6 System analysis

a. Prototyping model

b. Event table

c. ER-Diagram

d. Use case diagram & use case description

e. Activity diagram

f. Sequence diagram

g. Collaboration diagram

h. State chart diagram

i. Context Level diagram

j. Data Flow Diagram.

k. Class Diagram

7 System Design

a. Component Diagram

b. System Flow Chart

8 System coding

a. List of tables with attributes and
constraints

b. Testing & Validation

c. Test cases

9 System Implementation

10 Future Enhancement

11 Reference and Bibliography

1

CHAPTER

INTRODUCTION

INTRODUCTION TO PROJECT

1.1 Introduction

Live Chat is an easy-to-use, server based LAN messaging application
for effective communication. It correctly identifies and works under
all operating systems with unlimited user accounts and is the only
secure, messenger .The simple interface makes special training
needless.
1.2 Goals of the Project

 Communication: To develop an instant messaging solution
to enable users to seamlessly communicate with each other.
 User friendliness: The project should be very easy to use
enabling even a novice person to use it.
1.3 Innovative Ideas of the Project

 GUI: Easy to use GUI (Graphical User Interface), hence any
user with minimal knowledge of operating a system can use
the software.

 Platform independence: The messenger operates on
any system irrelevant of the underlying operating system.

 Unlimited clients: ‘n’ number of users can be
connected without any performance degradation of the
server.

2

CHAPTER

GANTT CHART

3

CHAPTER

ORGANIZATIONAL
OVERVIEW

Organizational overview

Purpose of the Project:-

This project is to create a chat application with a server and

clients to enable the clients to chat with many other clients in the

same common chat group. This project is to simulate the multicast

chatting. In the case of multicasting when a message is sent to a

group of clients, then only a single message is sent to the router.

Which means that the client will send the message only once and

based on the location of the clients, the router will either pass the

message to another router or if the clients are in the same local

network the router will send a copy of the message to each client in

that network. So this way we are reducing the number of messages

being passed in the whole network.

Scope of the Project:-

Mail Server with Live Chat is going to be a text communication

software, it will be able to communicate between two computers

using point to point communication. .

The limitation of Live Chat is it does not support audio conversations.

To overcome this limitation we are concurrently working on

developing better technologies.

Data communication over LAN networks is going to be a most

important mode of communication for the corporates in the very

near future. Companies have to rely on external networks which not

only are unreliable but also cost inefficient.

Companies would like to have a communication software wherein

they can communicate instantly within their organization.

The fact that the software uses an internal network setup within the

organization makes it very secure from outside attacks.

Organization chart:-

Detailed Idea about the Project:-

Communication:-

The different ways of communication are telephone lines, postal

services, satellites communication etc.

But the communication on computer is broadly divided into two

types i.e. communication over internet and communication over

intranet. For communicating over the internet you need to have an

internet connection which is not cost effective.

But communication over the intranet is very efficient and cost

effective. For that purpose you just need to have a LAN connection

within your organization and a continuously running server.

LAN:-

A local area network (LAN) is a computer network covering a local

area, like a home, office, or group of buildings.

The defining characteristics of LANs in contrast to WANs (wide area

networks) are: their much higher data rates; smaller geographic

range; and those they do not require leased telecommunication lines

Therefore, to enhance the communication features of the current

communication system, we are designing a product called Live Chat.

It is an instant messaging software.

Basically, any organization that requires continuous communication

between their employees can use this software.

The basic interaction between the client and the

server would be:-

Server

get Groups

Send Message

Client:-

The client would first authenticate itself as a valid user to the

server. Once the server validates the user, the user will try to

get the groups that are available in the server currently where

the client can chat. if a user wants to send a message to the

group then it will have to invoke the Send Message object of the

server. At any time the client can leave the group by sending

the Leave Group message to the server and the server will

delete this user from that group.

The above specified interactions is being implemented using

RMI and the particular instance where the Server sends the

message to all other users of that group will be implemented

using UDP socket. So the client will be listening for any

messages pertaining to that group at a particular port.The

initial aim of this project will be to create an application that

will try to work as a multicast server.

Since there is only 1 server being used here, so the actual

effect of multicasting will not be directly seen. But the main

aim here is to reduce the traffic in the network by having a

server which will actually propagate the messages in the

network instead of the client trying to send the message to

each of the user on its own. I will be first trying to implement

the client application with the interactions on the command line

rather than trying to make it fancy using an applet or Java

Swing. If time permits I will implement the fancy user interface.

Present system:-

When the existing system was studied, it was found having

some problems, existing system was very time consuming and

was not very efficient. The drawback of the existing system has

resulted in to the development of new system, which is very

user friendly and effective. Existing system was also very low in

performance.

While developing the new system all requirements of the end

user was taken into consideration. These have been maximum

efforts towards overcoming the drawbacks of the existing

system, while the new system was designed & developed.

Limitations of present system

 There is no private chatting option had been available.

 Client can connect with the server with the only IP

Address.

 The Performance of existing system s very low.

 The system does not maintain the list of active user.

4

CHAPTER

PROPOSED
SYSTEM

PROPOSED SYSTEM

 The system to be developed here is an Chat facility.

 It is a centralized system.

 It is Client-Server system with centralized database server.

 All local clients are connected to the centralized server via

LAN.

 There is a two way communication between different clients

and server.

 This chat application can be used for group discussion.

 It allows users to find other logged in users.

Tradeoff between Existing and Proposed System:-

1. No need of Internet connection:

Existing system requires Internet connection; whereas in the

proposed system only Intranet connection i.e. only a LAN connection

is required. This system is useful for those who can not afford to

have an Internet connection. For example: schools, colleges, small

companies, etc.

2. Conference possible on LAN:

Usually on LANs connections conferencing is not possible. The

proposed system allows the LAN users to create and participate in

conference. This makes communications possible among number of

LAN users simultaneously.

5

CHAPTER

SYSTEM STUDY

SYSTEM STUDY:-

Existing System Study:-

Currently there is no such system available. The users earlier need to

login into official website. Therefore the need for a chat system

facility was necessary. There is LAN network spread across various

offices, so we can develop software which can work on LAN.

SYSTEM ANALYSIS :-

System analysis is the way of studying a system with an eye on

solving its problem using computer. It is the most essential part of

the development of a project of a system analysis. System analysis

consists of system element, process and technology. To analyze a

system, has to study the systems in details.

The analyst has to understand the functioning and

concept of the system in detail, before design the appropriate

computer based system that will meet all the requirements of the

existing system. The system analyst has to carry out a customary

approach to use the computer for problem solving.

The above steps constitute the logical framework for the system

analysis.

After the preliminary investigation and feasibility study, the

scope of the defined and comparable items are set forth and hence

detailed investigation is executed. This allows the system analyst to

comprehend the full scope of the project. Soon after the

implementation of the newly developed system, followed by the

training of the users, the system analysis is included.

PRELIMINARY INVESTIGATION:-

A request to receive assistance from information system can be

made for many reasons, but in case a manager, employee or system

specialist initiates the request. When that request is made, the first

system activity preliminary investigation begins. The activity has

three parts .

Request clarification: -

the request from employee may not be well stated. Sometimes the

request may not be well defined. Therefore before any system

investigation can be considered, the project request must be

examined to determine precisely the actual requirements of the

organization.

Feasibility study:-

the basic idea of feasibility study is to determine whether the

requested project is feasible.

Request approval:

all projects that are requested are not desirable or feasible .some

organization receive so many projects requests from employee that

only a few of them can be pursued. However those projects that are

feasible and desirable should put into a schedule. The management

decides request that are most important. After a project request is

approved the cost priority, the completion time and the personal

required are estimated. Once the request is approved, the collection

of data and determination of requirements can be started.

REQUIREMENT SPECIFICATION
The primary goal of the system analyst is to improve the efficiency of

the existing system. For that the study of specification of the

requirements is very essential. For the development of the new

system, a preliminary survey of the existing system will be

conducted. Investigation done whether the up gradation of the

system into an application program could solve the problems and

eradicate the inefficiency of the Existing system.

HARDWARE REQUIREMENTS

Server:-

 128 MB RAM

 PIII and above processors

 2.1 GB Free Space

 Router

 NIC Card

 10BaseT Ethernet Card

Client:-

 128 MB RAM

 PIII or above

 1 GB Free Space

 NIC Card

 10BaseT Ethernet Card

Software Requirements:

 Operating system-Windows 98 or above.

 JDK 1.6

Network Requirements:

 LAN connection

Software Specification

Why java?

 Write once, run anywhere(WORA)

JAVA technology promises you that you only have to write your

application once –for the java platform & then you will able to run it

anywhere (any operating system)

 Security:-

The capacity of java platform allows users to download entrusted

code over a network & run it in secure environment in which can not

do any harm. Because the security guarantee, nearly as strong as

java makes.

Network-Centric Programming:-

SUN’s corporatism’s motto has always been ‚The network is the

computer, ‚The designer of the java platform believes in the

importance of Networking & designing the java platform to be

network-center to create network-based application using client-

server or multitier architecture.

 Performance

Java is portable interpreted language java programs runs almost as

fast as native non-portable C & C++.

 Programmer efficiency & Time-to-market

Java is an elegant language combined with a powerful & well

designed set of API. Java increases programmer’s efficiency

Why MS-Access?

MSACCESS for windows is a database management system,

that helps us to manage the data stored in the database. Database

Management System is a collection of interrelated data and a set of

program to access data. This collection of data is called the

database. The column heading are called as fields. The rows of data

are called as records.

MSACCESS, a relational database management system enables us

to manipulate data in more sophisticated ways. Relational database

management system avoids redundancy in data and defines the

relationship between sets of data.

The data stored in each table can be retrieved and updated based on

other tables. MSACCESS is a relational database management

system designed for the graphical environment .With

Dccess we can perform following tasks:

 Organize data into manageable data related units.

 Enter, locate and modify data.

 Extracts subset of data based on specific criteria.

 Automate command database task.

In Access, the term database returns to a single file that contains a

collection of information. A database consists of following objects:

Tables:

In Tables Data are stored in the format of rows and columns. Every

table in a database focuses on one subject. Each row or record in a

table is a unique instance of the subject of the table.

Queries:

Queries extract data from the table on a user defined criteria. They

enable us to view fields from more than one table.

Feasibility study

A feasibility study is undertaken to determine the possibility or

probability of improving the existing system or developing a totally

new system. Feasibility study is systematic and thorough study of

the existing system and an attempt to trace out the disadvantages

of the existing system.

Once management accepts the study proposals, it will lead to an

investigation of the existing system or problem area. This

investigation is conducted in close collaboration with user

management and in sufficient depth to establish in broad terms the

technical, operational and economical feasibility of the proposal.

The purpose of the LIVE CHAT is to communicate efficiently

between the different users in a local area network and exchange

data between them. The feasibility of this project depends upon a

number of factors such as cost, time, technology etc.

NEEDS FOR FEASIBILITY STUDY:

The feasibility study is needed for following things:-

 Answer the questions whether a new system is to be installed

or not?

 Determine the potential of the existing system.

 Improve the existing system.

 Know what should be embedded in the new system.

 Define the problems and objectives involved.

 Avoid costly repairs at later stage when system is

implemented.

 Avoid crash implementation of the new system.

 Avoid the ‘Hardware approach’ i.e. getting a computer first

and then deciding how to use it.

The Feasibility study is divided in to three parts:-

 TECHNICAL FEASIBILITY

 ECONOMIC FEASIBILITY

 OPERATIONAL FEASIBILITY

ECONOMIC FEASIBILITY:-

Economic analysis is most frequently used for evaluation of the

effectiveness of the system. More commonly knows as cost/benefit

analysis. the procedure is to determine the benefit and saving that

are expected from a system and compare them with costs, decisions

is made to design and implement the system.

This part of feasibility study gives the top management the economic

Justification for the new system. This is an important input to the

management the management, because very often the top

management does not like to get confounded by the various

technicalities that bound to be associated with a project of this kind.

A simple economic analysis that gives the actual comparison of costs

and benefits is much more meaningful in such cases.

In the system, the organization is most satisfied by economic

feasibility.

Because, if the organization implements this system, it need not

require any additional hardware resources as well as it will be saving

lot of time.

TECHNICAL FEASIBILITY:-

Technical feasibility centers on the existing manual system of the

test management process and to what extent it can support the

system.

According to feasibility analysis procedure the technical feasibility of

the system is analyzed and the technical requirements such as

software facilities, procedure, inputs are identified. It is also one of

the important phases of the system development activities.

The system offers greater levels of user friendliness combined with

greater processing speed. Therefore, the cost of maintenance can

be reduced. Since, processing speed is very high and the work is

reduced in the maintenance point of view management convince

that the project is operationally feasible.

BEHAVIOURAL FEASIBILITY:-

People are inherently resistant to change and computer has been

known to facilitate changes. An estimate should be made of how

strong the user is likely to move towards the development of

computerized system. These are various levels of users in order to

ensure proper authentication and authorization and security of

sensitive data of the organization.

6

CHAPTER

SYSTEM
ANALYSIS

The prototyping model:

The mode is used for developing the ‚Exam Tool‛ as the prototyping

model. Prototyping Model is based on the idea of developing an initial

implementation, exposing this to user comment and defining this

through many until an adequate system has been developed.

Benefits of prototyping model:-

The prototyping paradigm begins with requirement gathering.

Developers and customers meet and define the overall objective for

the software, identify the requirements and outline the areas where

further definitions are necessary. The prototype design is often,

quite different from that of the final system.

The benefits of developing a prototype early in the software process

are:

 Misunderstanding between software developers and users may

be identified, as the functions are demonstrated.

 Missing user services may be detected.

 Difficult to use or confusing user services may be indentified

and refined.

 Software development staff may find incompleteness and

inconsistency in requirement as the prototype is developed.

 A working albeit limited systems is available quickly to

demonstrate the feasibility and usefulness of the application to

the management.

 The prototype serves as a basis for writing the specification for

a production quality system. Though the principle purpose of

prototyping is to validate software requirements, software

prototype also has other uses.

 A prototype system can be used for training users before the

formal system has been delivered.

Prototype can run back-to-back tests. This reduces the need for

tedious manual checking of test run. The same test is given to both

the prototype and the system under test to look for differences in

the final results and thereby making necessary changes. Thus

prototype serves as a technique of risk reduction.

Selecting the prototype approach:-

The prototype paradigm can be either close-ended (throwaway

prototyping) or open-ended (evolutionary prototyping). Before

selecting closed or open-ended approach, it is necessary to

determine whether the system to be built is suitable for prototyping

or not. This is decided depending on application area, complexity,

customer characteristics and projects characteristics.

The throwaway is developed to understand the system requirements

while the evolutionary prototype evolves through a number of

versions to the final system.

Event table:-

Event Trigger Source Activity Response Destinati
on

User Ask for User User User User
form record selected
Login

User Ask for User Create User User
registra form new user registere
tion record d

User Ask for User Add the Nick User
Nick nick nick name name
name name in the chat saved
list

Ask for Enquire Server Look up IP User
IP for IP for IP address
Address address address checked

User Enquiry User Look up User User
selects for other for other selected
other users users
users
for chat

Entity Relationship diagram:-

SERVER

Message passes Server resends the message to

on to the server the respective client or

INTRANETWORK broadcasts it on every

clients screen

The message comes to the
Client sends the message respective client(s) again
to the server via the LAN through the LAN

CLIENT 1
CLIENT N

Preliminary System Design

USE CASE Scripts:-

 Logging as Server-user inserts his personal data (login,

password)

 verification is taking place after submitting data

 verification error is signalized by error message

 if verification doesn’t return error, user is allowed to

system

 Broadcasting Messages called by Server

 Server recived the message from one client and

broadcast it to other client

 Logging as a Client- inserts his personal data (login, password)

 verification is taking place after submitting data

 verification error is signalized by error message

 if verification doesn’t return error, user is allowed to

system

 Chatting with multiple client

 Client can chat with multiple client.

 Registration

 Client can add update delete the data from database

Activity diagram for Login:-

Enter Username and Password

Submit Username and Password

Verify Username and Password

Invali Login

Valid Login

Redirect to Chat Client Page

Activity diagram:-

Enter Username and Password

Submit Username and Password

Verify Username and Password

Invali Login

Valid Login

Redirect to chat Client Page

Login

Select Client or Group

chat

Sequence Diagram:-

aSendMessag
eWindow

client
Client
Message()

* write() Server

* recieve()

mssgType :=
getMssgType()

[validMssg]

new aBroadcastMssg

new
LogEntry

| |

| | |
|
| | |
X |
| | |
|
| | |
|
| | |
|
| | |
|
|
|

Collaboration Diagram :-

:SendMesseWindow

1 :client Message()

:Client
1.1.1 * receive()
1.1 * write()

:Server

1.1.2:
new
:BroadcastMssg

Class Diagram:-

Chat Server Class Diagram:-

ChatServer

ChatLogThread 1
1
ChatServerThread 1
1 1
1 1 ChatSocket
ChatLogBuffer 1 SocketNumber
1 1 ServerConnetionPool Hostname
close()

1 1
getConnection(), broadcast()
1
0..* 1..*
ChatHistoryItem ServerConnection
1
broadcast()
1 1
1 1
ServerSendThread ServerReceiveThread

broadcast()

Chat Client Class Diagram:-

ChatClient
MainWindow 1 1

exit() 1
1 1

1
ClientConnectionThread ChatSocket
1 1 1 SocketNumber
Hostname
DisplayTextArea close()
1 1
displayMsg()
1
ClientReceiveThread

1 1
ClientSendThread
SendTextArea

broadcast()

7

CHAPTER

SYSTEM DESIGN

Component diagram :-

Main Application
Server GUI

ChatServerInterface

DB Magement

Client GUI
ChatClientInterface

Database

System flow chart:-

Live Chat

Server
Client

Maintain
Chatting active user

8

CHAPTER

SYSTEM
CODING

List of tables with attributes and constraint:-

Table name : - login

Description : -It contains information of username and assword.

Field Data type Size Constraint Description

username Text 50 Foreign key Keeps the
username of
User

password Text 50 Keeps the
password of
User

Table name : - registration

Description :- It contains registration information of User.

Field Data type Size Constraint Description

firstname Text 30 User’s First Name

lastname Text 30 User’s Last Name

gender Text 10 User’s Gender

email Text 30 User’s Email Address

contact Text 10 User’s Contact
number

username Text 30 Primary Key User’s Username

password Text 30 User’s Password

Testing & Validations:-

System testing is a critical aspect of Software Quality Assurance and

represents the ultimate review of specification, design and coding.

Testing is a process of executing a program with the intent of

finding an error.

A good test is one that has a probability of finding an yet

undiscovered error. The purpose of testing is to identify and correct

bugs in the developed system. Nothing is complete without testing.

Testing is vital in the success of the system.

In the code testing the logic of the developed system is tested. For

this every module of the program is executed to find an error. To

perform specification test, the examination of the specifications

stating what the program should do and how it should perform

under various conditions.

Unit testing focuses first on the modules in the proposed system to

locate errors. This enables to detect errors in the coding and logic

that are contained within that module alone. Those resulting from

the interaction between modules are initially avoided. In unit testing

step each module has to be checked separately.

System testing does not test the software as a whole, but rather

the integration of each module in the system. The primary concern is

the compatibility of individual modules. One has to find areas where

modules have been designed with different specifications of data

lengths, type and data element name.

Testing and validation are the most important steps of the

developed system. The system testing is performed to ensure that

there are no errors in the implemented system. The software must

be executed several times in order to find out the errors in the

different modules of the system.

Validation refers to the process of using the new software for the

developed system in a live environment i.e., new software inside the

organization, in order to find out the errors.

The validation phase reveals the failures and the bugs in the

developed system. We will come to know about the practical

difficulties the system faces when operated in the true environment.

By testing the code of the implemented software, the logic of the

program can be examined. A specification test is conducted to check

whether the specifications stating the program are performing

under various conditions.

Apart from these tests, there are some special tests conducted

which are given below:

Peak Load Tests:

This determines whether the new system will handle the volume of

activities when the system is at the peak of its processing demand.

The test has revealed that the new software for the agency is

capable of handling the demands at the peak time.

Storage Testing:

This determines the capacity of the new system to store transaction

data on a disk or on other files. The proposed software has the

required storage space available, because of the use of a number of

hard disks.

Performance Time Testing:

This test determines the amount of the time used by the system to

process transaction data.

In this phase the software developed Testing is exercising the

software to uncover errors and ensure the system meets defined

requirements. Testing may be done at 4 levels

 Unit Level

 Module Level

 Integration & System

 Regression

 UNIT TESTING

A Unit corresponds to a screen /form in the package. Unit testing

focuses on verification of the corresponding class or Screen. This

testing includes testing of control paths, interfaces, local data

structures, logical decisions, boundary conditions, and error

handling. Unit testing may use Test Drivers, which are control

programs to co-ordinate test case inputs and outputs, and Test

stubs, which replace low-level modules. A stub is a 40 dummy

subprogram.

MODULE LEVEL :

Module Testing is done using the test cases prepared earlier.

Module is defined during the time of design.

INTEGRATION & SYSTEM TESTING:-

Integration testing is used to verify the combining of the software

modules. Integration testing addresses the issues associated with

the dual problems of verification and program construction. System

testing is used to verify, whether the developed system meets the

requirements.

REGRESSION TESTING:-

Each modification in software impacts unmodified areas, which

results serious injuries to that software. So the process of re-testing

for rectification of errors due to modification is known as regression

testing.

Testing Methods:

The box approach Software testing methods are traditionally divided

into white- and black-box testing. These two approaches are used to

describe the point of view that a test engineer takes when designing

test cases.

White box testing:-

White box testing is when the tester has access to the internal data

structures and algorithms including the code that implement these.

Types of white box testing

The following types of white box testing exist:

 API testing (application programming interface) - testing of

the application using public and private APIs

 Code coverage - creating tests to satisfy some criteria of code

coverage (e.g., the test designer can create tests to cause all

statements in the program to be executed at least once)

 Fault injection methods - improving the coverage of a test by

introducing faults to test code paths

 Mutation testing methods

 Static testing - White box testing includes all static testing

Black Box Testing:-

Black-box test design treats the system as a "black-box", so it doesn't

explicitly use knowledge of the internal structure.

Black-box test design is usually described as focusing on testing

functional requirements. Synonyms for black box include: Behavioral,

functional, opaque-box and closed-box.

A Simple Black box Specification:

Black Box Testing is testing technique having no knowledge of the

internal functionality/structure of the system. This testing technique

treats the system as black box or closed box. Tester will only know

the formal inputs and projected results. Tester does not know how

the program actually arrives at those results.

Hence tester tests the system based on the functional specifications

given to him. That is the reason black box testing is also considered

as functional testing.

This testing technique is also called as behavioral testing or opaque

box testing or simply closed box testing. Although black box testing

is a behavioral testing, Behavioral test design is slightly different

from black-box test design because the use of internal knowledge is

not illegal in behavioral testing

Test case:

For Login Page

 Cursor position in username field

 Validations for wrong entry of username

 Case sensitivity can be tested

 Cursor back to username field after being shown validation

message

 Cursor position to Password field on pressing Tab key.

 Validations for wrong entry of password.

 Case sensitivity should be tested

 Cursor back to password field after being shown validation

message.

 Focus to Login button on pressing Tab key.

9

CHAPTER

SYSTEM
IMPLEMENTATION

System implementation:-

Implementation is the stage of the project where the theoretical

design is turned in to a working system. The implementation state is

a system project in its own right.

It involves careful planning, investigation of the current system and

its constraints on implementation, design of methods to achieve the

changeover, training of staff in the change over procedure and

evaluation of change over methods.

Once the planning has been completed, the major efforts are to

ensure that the program in the system is working properly.

At the same time concentrate on training user staff. When the staff

has been trained a full system can carry out.

The various activities involved while implementing a project:-

 End user education and training.

 Training on application software

 System testing

 Parallel run and change over to new system

 Post implementation review

10

CHAPTER

FUTURE
ENHACEMENT

FUTURE ENHANCEMENTS:-

The primary application of a messenger is to communicate with

people.

A messenger is useful in the following ways for communication:

 The user can communicate with many people simultaneously.

 The user can transfer files to others.

 Files can also be shared between two or more users.

Communication plays a pivotal role in any organization, whether it is

a business organization, an educational institution or industry.

Besides telephone, emails etc a messenger can be used as an

effective and faster means of communication.

The people in the organization can have a meeting session using the

conferencing facility in the messenger.

Besides this it can also be used as a medium for entertainment.

For e.g. for chatting with friends, conferencing etc.

FUTURE ASPECTS:-

 Login session information: We can include a feature in this

application that will keep a record of the user’s login session.

 Profile Database: The profile information of every user can be

stored at the server.

 Login Timeout: This feature allows the user to be logged in only

for a specific time. After this time span ends, the user is

automatically logged out.

 File transferring and sharing: User can transfer one or more

files to other users. A file can also be shared between two or

more users

11

CHAPTER

BIBOLIGRAPHY

BIBLIOGRAPHY:-

Books referred

Java: The Complete Reference

- by Herbert Schildt

Introduction to Java Programming

- by Y. Daniel Liang

Internet References:-

www.books.google.co.in

www.howstuffworks.com

www.wikipedia.org

www.javaworld.com

www.sun.com

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