Chat Messanger

8/3/2019 Chat Messanger

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CHAT MESSANGER

//codingimport java.net.*;

import java.io.*;

import java.util.*;

import java.awt.*;

class chatClient extends Frame implements Runnable

{

Socket soc;

TextField tf;

TextArea ta;

Button btnSend,btnClose;

String sendTo;

String LoginName;

Thread t=null;

DataOutputStream dout;

DataInputStream din;

chatClient(String LoginName,String chatwith) throws Exception{

super(LoginName);

this.LoginName=LoginName;

sendTo=chatwith;

tf=new TextField(50);

ta=new TextArea(50,50);

btnSend=new Button("Send");

btnClose=new Button("Close");soc=new Socket("127.0.0.1",5217);

din=new DataInputStream(soc.getInputStream());

dout=new DataOutputStream(soc.getOutputStream());

dout.writeUTF(LoginName);


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t=new Thread(this);

t.start();

}void setup()

{

setSize(600,400);

setLayout(new GridLayout(2,1));

add(ta);

Panel p=new Panel();

p.add(tf);

p.add(btnSend);

p.add(btnClose);

add(p);

show();

}

public boolean action(Event e,Object o){

if(e.arg.equals("Send"))

{

try

{

dout.writeUTF(sendTo + " " + "DATA" + " " +

tf.getText().toString());

ta.append("\n" + LoginName + " Says:" +

tf.getText().toString());tf.setText("");

}

catch(Exception ex)

{

}


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}

else if(e.arg.equals("Close"))

{

try

{dout.writeUTF(LoginName + " LOGOUT");

System.exit(1);

}

catch(Exception ex)

{

}

}

return super.action(e,o);

}

public static void main(String args[]) throws Exception

{

chatClient Client1=new chatClient(args[0],args[1]);

Client1.setup();}

public void run()

{

while(true)

{

try

{

ta.append( "\n" + sendTo + " Says :" + din.readUTF());

}

catch(Exception ex)

{

ex.printStackTrace();

}


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}

}

}


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//Chat Server

import java.net.*;

import java.util.*;

import java.io.*;

class chatServer

{

static Vector ClientSockets;

static Vector LoginNames;

chatServer() throws Exception

{ServerSocket soc=new ServerSocket(5217);

ClientSockets=new Vector();

LoginNames=new Vector();

while(true)

{

Socket CSoc=soc.accept();

AcceptClient obClient=new AcceptClient(CSoc);}

{

chatServer ob=new chatServer();

}

class AcceptClient extends Thread

{Socket ClientSocket;

DataInputStream din;

DataOutputStream dout;

AcceptClient (Socket CSoc) throws Exception

{


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ClientSocket=CSoc;

din=new DataInputStream(ClientSocket.getInputStream());

dout=new

DataOutputStream(ClientSocket.getOutputStream());

String LoginName=din.readUTF();

System.out.println("User Logged In :" + LoginName);

LoginNames.add(LoginName);

ClientSockets.add(ClientSocket);

start();

}

public void run()

{

while(true)

{

try

{ String msgFromClient=new String();

msgFromClient=din.readUTF();

StringTokenizer st=new

StringTokenizer(msgFromClient);

String Sendto=st.nextToken();

String MsgType=st.nextToken();

int iCount=0;

if(MsgType.equals("LOGOUT")){

for(iCount=0;iCount


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msg=msg+" " +st.nextToken();

}

for(iCount=0;iCount


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}

}

if(MsgType.equals("LOGOUT"))

{

break;}

}

catch(Exception ex)

{

ex.printStackTrace();

}

}

}

}

}


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WORLD COLLEGE OF TECHNOLOGY & MANAGEMENT

GURGAON-110058

Batch (2008-2012)

SUMMER TRAINING REPORT

ON

CHAT MESSANGER

Submitted in partial fulfillment of the requirements

for the award of the degree of

B.Tech

to

Maharishi Dayanand University, Rohtak

Guide: Submitted by:

Mr. RITESH Dipti Singh

19/I.T/08


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ACKNOWLEDGEMENT

Project work is essentially a learning process in which

apart from learning the subject itself, one also learns to

share ideas and work as a team. I am sure that

involvement in this project as well as the exposure I have

gained will prove to be stepping stone for other

opportunities that come in my way

I am thankful to my project guide Mr. ritesh who helped

in all ways to make this project a success.

Last but not least I am thankful to all those people who

have directly or indirectly contributed for the success of

this project.

Dipti singh


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INDEX

S.No. Topics Teacher

sSignatur

e1. About BHEL

Certificate2. About JAVA CORE

INTRODUCTION

FEATURES

BASIC JAVA PROGRAM

CONNECTIVITY

3. About Project

Introduction

Software used

Coding conclusion


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CORE JAVA

INTRODUCTION

In 1990, SunMicrosystembegan a project called

GREEN to develop software for consumer electronics.

It took 18months to develop the first working version.

This language initially called Oak, but was renamed toJava in 1995.

Java was conceived by James Gosling, Patrick Naughton,

Chris Warth, Ed Frank and Mike Sheridan. In 1991

Gosling began writing software in C++for embedding into

such items as toasters, VCRs etc. The embedded

software makes appliances more intelligent, typically by

adding Digital display or by using Artificial Intelligenceto better control mechanism. However, it soon become

apparent to Gosling that C++ was wrong tool for the job.

C++ is flexible enough to control embedded systems, but

it is susceptible to bugsthat can crash system. In

particular, C++ uses direct references to system

resources and requires programmer to keep track of how

these resources are managed, which is significant burdenon programmers. This burden of resource management is

a barrier to writing reliable, portable software and it is

serious problem for consumer electronics.


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FEATURES

Simple: A JAVA programmer need not know the

internal of java.

Object-oriented: Java defines data as object with

method that supports the objectoriented. Java is

purely objectoriented. Any codes you write, you have

to write in Class.

Distributed: Java programs can access data across theweb as easily as they access data from a local system.

Interpreted and Compiled: Java is both interpreted

and compiled. A java applet is written and compiled into

what is called bytecode. This byte code is binary and

platform independent. When this applet has to be

executed it is fetched to the local system where it isinterpreted by the browser. Only 80% is compiled and

20% interpreted when executed, this is because

security purpose. Java environment contains an

element called the linker. The linker checks the coming

data into your machine to make sure it does not contain

deliberately harmful files or files that could disrupt

the functioning your computer.

Architecture Natural: Java can work with a variety of

hardware and operating system. The only requirement


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is that the system should have java enabled Internet

browser.

Robust: Robust means reliable. A reliable language willallow you to write programs that dont crash when least

expected and will also be bug free.

Java is secure: A program traveling across the

Internet onto your machine is unseen by you and could

possibly be carrying a virus along with it. This is a

possibility in java program. But due to strong typechecking done by java on the users local machine, any

changes to the program are tagged as an error the

program will not executed.

Multithreaded: Ability of an applet to perform

multiple tasks at the same time. For e.g.; suppose you

are playing a game one thread displaying score, onegraphics. In single threaded applet only one task can

be performed at a given point of time.

Dynamic: A java program can consist of many modules

that are written by many programmers. These modules

may undergo many changes. Java makes

interconnection between modules at run time, which

easily avoids the problem caused by the changes of the

code used by your program java thus dynamic.


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BASIC JAVA PROGRAM

//Java Program

public class MyFirstProg{

public static void main(String args[])

{

System.out.println(This is first program);

}

}

Let us check it line by line:

Line 1: This line is called comment line, which will be

ignored by the compiler. They make program more

readable. The multiple line comment begins with /*and

ends with*/. A single line comment begins with a // and

ends at the end of the line.Line 2: In java everything should be in class which is

declared using the keyword class. public means your class

is available and accessible by any one.

MyFirstProg is the name of the class.

Line 4: The public keyword is an access specifier, which

controls the visibility and scope of class members.

The static keyword allows the main() method to be called,

without needing to create an instance of the class.

The void keyword tells the compiler that the main()

method does not return any value when it is executed.


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Main() is the entry point of your program i.e; programs

execution starts from here.

String is a type which stores character strings and args[]

is an array of type String.Line 6:System.out.println is used to print anything on the

console.

{} defines the scope of any method / class

; line terminator


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Saving File: Primary name of file must be same as the

name of the class and extension must be java.

Compilation: javac MyFirstProg.java

After compilation it creates .class file which is

bytecode format


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Execution: java MyFirstProg


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CONNECTIVITY

Connectivity is connecting FRONT END with BACK END.

Database Management:

A database is a collection of related information. A

DBMS is a software that provide us a mechanism to

retrieve, modify and add data to the database. Examples

are :MS-Access, MS SQL Server, Oracle, Sybase,

Informix and Ingress. Each DBMS/RDMS store the data

in their own format. MS Access stores in .mdb fileformat and MS SQL stores data in a .dat file format.

Using connectivity one can develop a application through

which user can interact with database like user can

add/retrieve/modify/delete data through that

application.

ODBC:

Is an abbreviation of Open Database Connectivity .It is a

interface used to interact with database from

programming language through its functions. It manages

this by inserting a middle layer called driver, between

the application and the DBMS. It translates queries of

application into commands that the DBMS understands.

For both the application and the DBMS must be

compliant.

JDBC:


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It provides a database programming for JAVA programs.

Since ODBC is an C interfacel thus JAVA program

cannot directly communicate with ODBC driver.

JavaSoft created the JDBC-ODBC Bridge driver thattranslate JDBC API to the ODBC API.

Steps for Database Access:

Import the java.sql package: import java.sql.*;

Load and register the driver:

Class.forName(sun.jdbc.odbc.JdbcOdbcDriver);

Create a Connection object: Connectionc=DriverManager,getConnection(jdbc:odbc:DSN);

Create a Statement object: Statement

s=c.createStatement();

Execute the statement: ResultSet

r=s.executeQuery(select * from table);

Terminate connection: c.close();


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Introduction

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Enterprises and Institutions across 40 countries.

NIITs training solutions in IT, Business Process Outsourcing, Banking,

Finance and Insurance, Executive Management Education, and Communication

and Professional Life Skills, touch five million learners every year. NIITs

expertise in learning content development, training delivery and education

process management make it the most preferred training partner,

worldwide.

Research-based Innovation, a key driver at NIIT, has enabled the

organisation to develop programs and curricula that use cutting-edge

instructional design methodologies and training delivery. NIITs Individual

Learning Business offerings include industry-endorsed programs forstudents seeking careers in IT New Age GNIIT(Indias First Cloud

Campus), Edgeineers and Global Net Plus for IT professionals.

NIIT has provided computer-based learning to over 15,000 government and

private schools. The futuristic NIITNGuru range for schools is a holistic

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For working professionals, NIIT Imperia, Centre for Advanced Learning,

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Ahmadabad, IIM Calcutta, IIM Lucknow, IMT Ghaziabad and IIFT Delhi.

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KPMG and on Digital Marketing with Google India and Internet and Mobile

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NIIT Institute of Finance Banking & Insurance (IFBI), formed by NIIT

with equity participation from ICICI Bank, offers programs for individuals

and corporates in Banking, Financial Services and Insurance.

NIIT Uniqua, Centre for Process Excellence, addresses the increasing

demand for skilled workers in the business and technology services industry

by providing training programs in relevant areas. This is a part of NIIT

Institute of Process Excellence, a NIIT-Genpact venture.

NIIT Careers@Campus, the companys Institutional Alliances Business for

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management) to Fortune 500 companies, Universities, Technology companies,

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technology and services through Element K offerings. These include: vLab:hands-on labs, instructor-led courseware, comprehensive e-reference

libraries, technical journals, and KnowledgeHub: hosted learning

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comprehensive learning solutions, worldwide.

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amongst Top 25 Best Employers in India- 2011; Indian Education Awards

2011 as Best Education Company to Work with; by Great Places to Work

Institute as amongst Top 25 Indias Best Companies to Work for and Firstin Training & Education Industry, 2011.

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Documents

Chat Messanger