java project report

7/30/2019 java project report

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Six Months Industrial Training Project reportOn

Madame Management

Baba Farid College Of Engineering and Technology

Bathinda

Submitted To:

Submitted By:

Jaspreet Kaur(90080302449)

Lovleen Gupta(90080302458)

Samandeep Kaur(90080302476)


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ACKNOWLEDGEMENT

I would like to thankMr. MJS Dhillon (Director of INFOWIZ) for providing this opportunity to

take training on Core Java/Android technology under his guidance.

I would like to humbly and sincerely thank to Ms. Jenifa Chauhan, (Supervisor and

Department Manager) and Mr. Ankur (Trainer), INFOWIZ for their generous guidance,

valuable suggestions and encouragement given to me at different stages.

Last but not the least, I express my heartiest gratitude to Almighty god, my Parents for their love

and blessings to get such a wonderful opportunity


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ABSTRACT

This is a project report on madame management During the making/developing of this

project we explored new ideas and functionality behind the working of a notepad.

We have learnt a lot during this project and liked the improvement in our testing skills and deep

concept related to these kinds of projects.

Our project is Madame Management. This is a offline application which helps people to give

the facility to manage the details of staff details, customer details, discounts and other

facilities provided to customers.


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PREFACE

Learning comes from doing. To learn something one has to go through Practical conditions.

Recognizing this fact, the University has made it essential forB.Tech students to undergo

Industrial Training for six weeks. During this period, the student learns about the functioning of

the organization and the actual business environment. Also this training helps the student how to

implement the theoretical knowledge into practical life, in our day to day life. This project report

was prepared during the training period in the month of May June.

During this period, an effort was made to understand Madame Managementand to finish the

project work assigned to us. This report lays special emphasis on the operational work, tasks and

projects carried out during the training period.


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LIST OF CONTENTS

Sr.No. CONTENTS PAGE NO Remarks

1. FrontPage 1

2. Acknowledgement 2

3. Abstract 3

4. Preface 4

5. List of contents 5

6. Organization Overview 6

7. Project Description 7

8. Components of Projects 8

9. Requirement Analysis 9

10. Java history 10-11

11. Java concepts 12-31

12. System Design

1. Data Flow Diagrams2. Screen Shots

32-37


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COMPANY PROFILE

INFOWIZ is an 6 years young organization with ISO Certification which has been working in the field of

IT , Embedded System and has been providing its clients with exceptional quality in Web Design, Web

Development and SEO services. Our clients range from small, medium to large scale Business houses &

individuals. We also provide the off shore companies of US, UK, France, Ireland, Canada and Australiawith quality and timely Web and SEO services.

INFOWIZ is an organization which is established in the field of Web Development ( PHP &

.NET ), JAVA (Core as well as Advance), Iphone & Android Applications, Embedded

systems(AVR, PIC & ARM), and ROBOTICS.

INFOWIZ does not boast itself of being the best Development Company but enjoys reputable

position among top Web Development and Electronics companies because of our timely delivery

and quality work. Our skilled team of professionals make sure that the product is developed as

per the customers needs and also keeping the customer informed about the development of his

project from time to time. We do not only emphasize on formulating an attractive solution to our

clients but also believe in providing a workable solution. INFOWIZ offers research based Search

Engine Marketing products that help achieve greater insights to customers online business. Our

Research & Development arm offers SEO tools for SEM professionals.


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PROJECT DESCRIPTION

This is an Madame Management project. In this project we are showing a Showroom

Management functionality. In this Project We have one panel: Admin Panel. Admin can insert

,update or delete customers to customer details and also staff details database.

We made this application in Core java and my database is MS SQL Server 2005. Wehave our database in application folder App data. To run this application just attaches this

database on your machine and change the connection string.

Now when you run the application for the first time the login page will show. If you

have already registered with the site, then enter your username and password and the application

will redirect to your login page.


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COMPONENTS OF THE PROJECT

1. How to Logina. In this module, the user will enter his username and password to goto home page.

2. Home Page. Customer Details : This button refers to the page of Customer details who are

registered.

Staff Info: This button refers to the page of general information of staff ofmadame showroom.

Inventory: This button refers to the page of details of products available andrequired.

Bill: This button refers to the page which contains discounts and productsinformation of the products customer requires.


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REQUIREMENT ANALYSIS

Hardware Requirements

Number Description

1 Computer System

2 1GBRAM

Software Requirements

Number Description

1 Windows XP7,any OS supporting NetBeans and

MsSQL

2 NetBeans

3 MsSql Server 2005


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INTRODUCTION TO TOOLS

FRONT-END/BACK-END

Front-End: NetBeans

Back-End: MsSQL SERVER 2005

Front End:

Net Beans Net Beans is an integrated development environment (IDE) from SunMicrosystems. It is used to develop console and graphical user interfaceapplications along

with Windows Forms applications, web sites, web applications, and web services.

NetBeans supports different programming languages by means of language services,

which allow the code editor and debugger to support (to varying degrees) nearly any

programming language, provided a language-specific service exists. Built-in languages

include C/C++ .

Backend:

SQLSERVERMicrosoft SQL Server is a relational database server, developed byMicrosoft: it is a software product whose primary function is to store and retrieve data as

requested by other software applications, be it those on the same computer or those

running on another computer across a network (including the Internet). There are at least

a dozen different editions of Microsoft SQL Server aimed at different audiences and for

different workloads (ranging from small applications that store and retrieve data on the

same computer, to millions of users and computers that access huge amounts of data from

the Internet at the same time).
http://en.wikipedia.org/wiki/Integrated_development_environmenthttp://en.wikipedia.org/wiki/Microsofthttp://en.wikipedia.org/wiki/Microsofthttp://en.wikipedia.org/wiki/Console_applicationhttp://en.wikipedia.org/wiki/Graphical_user_interfacehttp://en.wikipedia.org/wiki/Application_softwarehttp://en.wikipedia.org/wiki/Application_softwarehttp://en.wikipedia.org/wiki/Windows_Formshttp://en.wikipedia.org/wiki/Web_sitehttp://en.wikipedia.org/wiki/Web_applicationhttp://en.wikipedia.org/wiki/Web_servicehttp://en.wikipedia.org/wiki/Programming_languagehttp://en.wikipedia.org/wiki/C_%28programming_language%29http://en.wikipedia.org/wiki/C%2B%2Bhttp://en.wikipedia.org/wiki/Relational_database_management_systemhttp://en.wikipedia.org/wiki/Microsofthttp://en.wikipedia.org/wiki/Microsofthttp://en.wikipedia.org/wiki/Relational_database_management_systemhttp://en.wikipedia.org/wiki/C%2B%2Bhttp://en.wikipedia.org/wiki/C_%28programming_language%29http://en.wikipedia.org/wiki/Programming_languagehttp://en.wikipedia.org/wiki/Web_servicehttp://en.wikipedia.org/wiki/Web_applicationhttp://en.wikipedia.org/wiki/Web_sitehttp://en.wikipedia.org/wiki/Windows_Formshttp://en.wikipedia.org/wiki/Application_softwarehttp://en.wikipedia.org/wiki/Graphical_user_interfacehttp://en.wikipedia.org/wiki/Console_applicationhttp://en.wikipedia.org/wiki/Microsofthttp://en.wikipedia.org/wiki/Integrated_development_environment


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HISTORY

The Java platform and language began as an internal project at Sun Microsystems in

December 1990, providing an alternative to the C++/C programming languages. Engineer

Patrick Naughton had become increasingly frustrated with the state of Sun's C++ and C

application programming interfaces (APIs) and tools. While considering moving to NeXT,

Naughton was offered a chance to work on new technology and thus the Stealth Project was

started.

The Stealth Project was soon renamed to the Green Project with James Gosling and

Mike Sheridan joining Naughton. Together with other engineers, they began work in a small

office on Sand Hill Road in Menlo Park, California. They were attempting to develop a new

technology for programming next generation smart appliances, which Sun expected to be a major

new opportunity.

The team originally considered using C++, but it was rejected for several reasons.

Because they were developing an embedded system with limited resources, they decided that

C++ needed too much memory and that its complexity led to developer errors. The language's

lack ofgarbage collection meant that programmers had to manually manage system memory, a

challenging and error-prone task. The team was also troubled by the language's lack of portable

facilities for security, distributed programming, and threading. Finally, they wanted a platform

that could be easily ported to all types of devices.

Bill Joy had envisioned a new language combining Mesa and C. In a paper

called Further, he proposed to Sun that its engineers should produce an object-orientedenvironment based on C++. Initially, Gosling attempted to modify and extend C++ (that he

referred to as "C++ ++ --") but soon abandoned that in favor of creating a new language, which

he called Oak, after the tree that stood just outside his office.
http://en.wikipedia.org/wiki/Sun_Microsystemshttp://en.wikipedia.org/wiki/C_%28programming_language%29http://en.wikipedia.org/wiki/Patrick_Naughtonhttp://en.wikipedia.org/wiki/Application_programming_interfacehttp://en.wikipedia.org/wiki/NeXThttp://en.wikipedia.org/wiki/James_Goslinghttp://en.wikipedia.org/wiki/Sand_Hill_Roadhttp://en.wikipedia.org/wiki/Menlo_Park,_Californiahttp://en.wikipedia.org/wiki/Embedded_systemhttp://en.wikipedia.org/wiki/Garbage_collection_%28computer_science%29http://en.wikipedia.org/wiki/Distributed_programminghttp://en.wikipedia.org/wiki/Thread_%28computer_science%29http://en.wikipedia.org/wiki/Bill_Joyhttp://en.wikipedia.org/wiki/Mesa_%28programming_language%29http://en.wikipedia.org/wiki/Object-oriented_programminghttp://en.wikipedia.org/wiki/Oak_%28programming_language%29http://en.wikipedia.org/wiki/Oak_%28programming_language%29http://en.wikipedia.org/wiki/Object-oriented_programminghttp://en.wikipedia.org/wiki/Mesa_%28programming_language%29http://en.wikipedia.org/wiki/Bill_Joyhttp://en.wikipedia.org/wiki/Thread_%28computer_science%29http://en.wikipedia.org/wiki/Distributed_programminghttp://en.wikipedia.org/wiki/Garbage_collection_%28computer_science%29http://en.wikipedia.org/wiki/Embedded_systemhttp://en.wikipedia.org/wiki/Menlo_Park,_Californiahttp://en.wikipedia.org/wiki/Sand_Hill_Roadhttp://en.wikipedia.org/wiki/James_Goslinghttp://en.wikipedia.org/wiki/NeXThttp://en.wikipedia.org/wiki/Application_programming_interfacehttp://en.wikipedia.org/wiki/Patrick_Naughtonhttp://en.wikipedia.org/wiki/C_%28programming_language%29http://en.wikipedia.org/wiki/Sun_Microsystems


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By the summer of 1992, they were able to demonstrate portions of the new platform

including the Green OS, the Oak language, the libraries, and the hardware. Their first attempt,

demonstrated on September 3, 1992, focused on building a personal digital assistant (PDA)

device named Star7

that had a graphical interface and a smart agent called "Duketo assist the

user.

In November of that year, the Green Project was spun off to become firstperson, a

wholly owned subsidiary of Sun Microsystems, and the team relocated to Palo Alto, California.

The first person team was interested in building highly interactive devices, and when Time

Warnerissued a request for proposal (RFP) for a set-top box, firstperson changed their target and

responded with a proposal for a set-top box platform. However, the cable industry felt that their

platform gave too much control to the user and firstperson lost their bid to SGI. An additionaldeal with The 3DO Company for a set-top box also failed to materialize. Unable to generate

interest within the TV industry, the company was rolled back into Sun.
http://en.wikipedia.org/wiki/Operating_systemhttp://en.wikipedia.org/wiki/Personal_digital_assistanthttp://en.wikipedia.org/w/index.php?title=Star7&action=edit&redlink=1http://en.wikipedia.org/w/index.php?title=Star7&action=edit&redlink=1http://en.wikipedia.org/wiki/Palo_Alto,_Californiahttp://en.wikipedia.org/wiki/Time_Warnerhttp://en.wikipedia.org/wiki/Time_Warnerhttp://en.wikipedia.org/wiki/Request_for_proposalhttp://en.wikipedia.org/wiki/Set-top_boxhttp://en.wikipedia.org/wiki/Cable_TVhttp://en.wikipedia.org/wiki/Silicon_Graphicshttp://en.wikipedia.org/wiki/The_3DO_Companyhttp://en.wikipedia.org/wiki/The_3DO_Companyhttp://en.wikipedia.org/wiki/Silicon_Graphicshttp://en.wikipedia.org/wiki/Cable_TVhttp://en.wikipedia.org/wiki/Set-top_boxhttp://en.wikipedia.org/wiki/Request_for_proposalhttp://en.wikipedia.org/wiki/Time_Warnerhttp://en.wikipedia.org/wiki/Time_Warnerhttp://en.wikipedia.org/wiki/Palo_Alto,_Californiahttp://en.wikipedia.org/w/index.php?title=Star7&action=edit&redlink=1http://en.wikipedia.org/wiki/Personal_digital_assistanthttp://en.wikipedia.org/wiki/Operating_system


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INTRODUCTION TO JAVA

Java is an object-oriented programming language with a built -in application

programming interface (API) that can handle graphics and u ser interfaces and that can be used

to create applications or applets. Because of its rich set of API's, similar to Macintosh and

Windows, and its platform independence, Java can also be thought of as a platform in itself. Java

also has standard libraries for doing mathematics.

Much of the syntax of Java is the same as C and C++. One major difference is that

Java does not have pointers. However, the biggest difference is that you must write object

oriented code in Java. Procedural pieces of code can only be embedded in objects. In the

following we assume that the reader has some familiarity with a programming language. In

particular, some familiarity with the syntax of C/C++ is useful.

In Java we distinguish between applications, which are programs that perform the

same functions as those written in other programming languages, and applets, which are

programs that can be embedded in a Web page and accessed over the Internet. Our initial focus

will be on writing applications. When a program is compiled, a byte code is produced that can be

read and executed by any platform that can run Java.


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Java Features

Java is simple, easy to design , easy to write, and therefore easy to compile, debug, and learnthan any other programming languages.

Java is object-oriented, that is used to build modular programs and reusable code in otherapplication.

Java is platform-independent and flexible in nature. The most significant feature of Java is torun a program easily from one computer system to another.

Java works on distributed environment. It is designed to work on distributed computing , Anynetwork programs in Java is same as sending and receiving data to and from a file.

Java is secure. The Java language, compiler, interpreter and runtime environment aresecurable .

Java is robust. Robust means reliability. Java emphasis on checking for possible errors, asJava compilers are able to detect many error problem in program during the execution of

respective program code.

Java supports multithreaded. Multithreaded is the path of execution for a program to performseveral tasks simultaneously within a program. The java come with the concept of

Multithreaded Program. In other languages, operating system-specific procedures have to be

called in order to work on multithreading.

Java fully follows oops.


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The Simple Types

Java defines eight simple (or elemental) types of data: byte, short, int, long, char, float,double, and boolean.

These can be put in four groups:-

1) Integers :

This group includes byte, short, int, and long, which are for whole-valued signed

numbers. Floating-point numbers This group includes float and double, which represent

numbers with fractional precision. All of these are signed, positive and negative values. Java

does not support unsigned, positive -only integers. The width of an integer type should not be

thought of as the amount of storage it consumes, but rather as the behavior it defines for

variables and expressions of that type.

The Java run-time environment is free to use whatever size it wants, as long as the

types behave as you declared them. In fact, at least one implementation stores bytes and shorts

as 32-bit (rather than 8- and 16-bit) values to improve performance, because that is the word size

of most computers currently in use.

The width and ranges of these integer types vary widely, as shown in this table:

a) ByteThe smallest integer type is byte. This is a signed 8-bit type that has a range from 128

to 127. Variables of type byte are especially useful when you're working with a stream of data

from a network or file. They are also useful when you're working with raw binary data that may

not be directly compatible with Java's other built -in types. Byte variables are declared by use of

the byte keyword. For example, the following declares two byte variables called b and c:

byte b, c;


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b)ShortShort is a signed 16-bit type. It has a range from 32,768 to 32,767. It is probably the

least-used Java type, since it is defined as having its high byte first (called big-endian format).

This type is mostly applicable to 16 -bit computers, which are becoming increasingly scarce.

Here are some examples ofshort variable declarations:

o short s;o short t;

c) Int

The most commonly used integer type is int. It is a signed 32-bit type that has a range. Its

range is from 2,147,483,648 to 2,147,483,647. Any time you have an integer expression

involving bytes, shorts, ints, and literal numbers, the entire expression ispromotedto intbefore

the calculation is done.

d) Long

Long is a signed 64-bit type and is useful for those occasions where an int type is not large

enough to hold the desired value. The range of a long is quite large. This makes it useful when

big, whole numbers are needed.

.

2) Floating-Point Types

Floating-point numbers, also known as realnumbers, are used when evaluation expressionsthat require fractional precision. There are two kinds of floating -point types, float and double,

which represent single- and double-precision numbers. Their width and ranges are shown here:


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a) Float

The type float specifies a single-precision value that uses 32 bits of storage. Single

precision is faster on some processors and takes half as much space as double precision,

but will become imprecise when the values are either very large or very small. Variables oftype float are useful when you need a fractional component, but don't require a large degree

of precision. For example, float can be useful when representing dollars and cents. Here are

some example float variable declarations: float hightemp, lowtemp.

b) Double

Double precision, as denoted by the double keyword, uses 64 bits to store a value. Double

precision is actually faster than single precision on some modern processors that have been

optimized for high -speed mathematical calculations. All transcendental math functions, such

as sin( ), cos( ), and sqrt( ), return double values. When you need to maintain accuracy over

many iterative calculations, or are manipulating large valued numbers, double is the best

choice. Here is a short program that uses double variables to compute the area of a circle:

Compute the area of a circle.

class Area {

public static void main(String args[]) {

double pi, r, a;

r = 10.8; // radius of circle

pi = 3.1416; // pi, approximately

a = pi * r * r; // compute area

System.out.println("Area of circle is " + a);}}

3) CharactersThis group includes char, which represents symbols in a character set, like letters and

numbers. In Java, the data type used to store characters is char. Java uses Unicode to represent

characters. Unicode defines a fully international character set that can represent all of the

characters found in all human languages. In Java char is a 16-bit type. The range of a char is 0

to 65,536. There are no negative chars. The standard set of characters known as ASCII still


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ranges from 0 to 127 as always, and the extended 8 -bit character set, ISO-Latin-1, ranges from 0

to 255.

Here is a program that demonstrates char variables:

// Demonstrate char data type.

class CharDemo

{

public static void main(Str ing args[])

{

char ch1, ch2;

ch1 = 88; // code for X

ch2 = 'Y';

System.out.print("ch1 and ch2: ");

System.out.println(ch1 + " " + ch2);

}

}

This program displays the following output:

ch1 and ch2: X Y

Notice that ch1 is assigned the value 88, which is the ASCII (and Unicode) value that

corresponds to the letterX.

Even though chars are not integers, in many cases you can operate on them as if they

Were integers. This allows you to add two characters together, or to increment the value

of a character variable.


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4) BooleanThis group includes boolean, which is a special type for representing true/false values.

You can use these types as -is, or to construct arrays or your own class types. Thus, they

form the basis for all other types of data that you can create. Java has a simple type, called

boolean, for logical values. It can have only one of two possible values, true orfalse. This

is the type returned by all relational operators, such as a < b. boolean is also the type

requiredby the conditional expressions that govern the control statements such as ifand for.

Here is a program that demonstrates the boolean type:

// Demonstrate boolean values.

class BoolTest

{

public static void main(String args[])

{

boolean b;

b = false;

System.out.println("b is " + b);

b = true;

System.out.println("b is " + b);

// a boolean value can control the if statement

if(b) System.out.println("This is executed.");

b = false;

if(b) System.out.println("This is not executed.");

// outcome of a relational operator is a boo lean value

System.out.println("10 > 9 is " + (10 > 9));

}

}The output generated by this program is shown here:

b is false

b is true

This is executed.

10 > 9 is true


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There are three interesting things to notice about this program. First, as you can see,

when a boolean value is output by println( ), "true" or "false" is displayed. Second, the

value of a boolean variable is sufficient, by itself, to control the ifstatement. There is

no need to write an ifstatement like this:

if(b == true) ...

Third, the outcome of a relational operator, such as 9 displays the value "true."

Type Conversion and Casting

If you have previous programming experience, then you already know that it is fairly

common to assign a value of one type to a varia ble of another type. If the two types arecompatible, then Java will perform the conversion automatic ally. For example, it is always

possible to assign an int value to a long variable. However, not all types are compatible, and

thus, not all type conversio ns are implicitly allowed. For instance, there is no conversion defined

from double to byte. To do so, you must use a cast, which performs an explicit conversion

between incompatible types. Let's look at both automatic type conversions and casting.

Java's Automatic Conversions

When one type of data is assigned to another type of variable, an automatic type conversion will

take place if the following two conditions are met:

The two types are compatible. The destination type is larger than the source type.

When these two conditions are met, a widening conversion takes place. For

example, the int type is always large enough to hold all valid byte values, so no explicit

cast statement is required. For widening conversions, the numeric types, including integer

and floating-point types, are compatible with each other. However, the numeric types are

not compatible with char orBoolean . Also, char and boolean are not compatible with

each other.


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As mentioned earlier, Java also performs an automatic type conversion when storing a

literal integer constant into variables of type byte, short, orlong.

Casting Incompatible Types

To create a conversion between two incompatible types, you must use a cast. A castis

simply an explicit type conversion.

It has this general form:

(target-type) value. Here, target-type specifies the desired type to convert the specified value to.

Forexample, the following fragment casts an int to a byte. If the integer's value is largerthan the

range of a byte, it will be reduced modulo byte's range.

int a;

byte b;

// ...

b = (byte) a;

A different type of conversion will occur when a floating -point value is assigned to aninteger type: truncation. As you know, integers do not ha ve fractional components. Thus, when

a floating-point value is assigned to an integer type, the fractional

component is lost. For example, if the value 1.23 is assigned to an integer, the resulting value

will simply be 1. The 0.23 will have been truncated. Of course, if the size of the whole number

component is too larg e to fit into the target integer type, then that value will be reduced modulo

the target type's range.

The following program demonstrates some type conversions that require casts:

// Demonstrate casts.

class Conversion {

public static void main(String args []) {

byte b;


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int i = 257;

double d = 323.142;

System.out.println("\\nConversion of int to byte.");

b = (byte) i;

System.out.println("i and b " + i + " " + b);

System.out.println("\\nConversion of double to int.");

i = (int) d;

System.out.println("d and i " + d + " " + i);

System.out.println("\\nConversion of double to byte.");

b = (byte) d;

System.out.println("d and b " + d + " " + b);

}

}

This program generates the following output:

Conversion of int to byte.

i and b 257 1

Conversion of double to int.

Core Java Student Guide Page 19 of

95

d and i 323.142 323

Conversion of double to byte.

d and b 323.142 67


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Inheritance in Java

Inheritance is a compile-time mechanism in Java that allows you to extend a class (called

the base class or super class) with another class (called the derived class orsubclass). In Java,

inheritance is used for two purposes:

1. class inheritance- create a new class as an extension of another class, primarily for the

purpose ofcode reuse. That is, the derived class inherits the public methods and public data of

the base class. Java only allows a class to have one immediate base class, i.e., single class

inheritance.

2. interface inheritance- create a new class to implement the methods defined as part of an

interface for the purpose ofsubtyping. That is a class that implements an interface conforms

to (or is constrained by the type of) the interface. Java supports multiple interface inheritance.

In Java, these two kinds of inheritance are made distinct by using different language syntax. For

class inheritance, Java uses the keyword extends and for interface inheritance Java uses the

Keyword implements.

public class derived-class-name extendsbase-class-name

{

// derived class methods extend and possibly override

// those of the base class

}

public class class-name implements interface-name

{

// class provides an implementation for the methods

// as specified by the interface

}


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Class inheritance

This mechanism of deriving a new class from existing/old class is called inheritance. The old

class is known as base class, superclass or parent class; and the new class is known as

sub class,derived class, or child class.The inheritance allows subclasses to inherit allproperties (variables and methods) of their parent classes.The different forms of inheritance are:

Single inheritance (only one super class) Multiple inheritance (several super classes) Hierarchical inheritance (one super class, many sub classes) Multi-Level inheritance (derived from a derived class) Hybrid inheritance (more than two types) Multi-path inheritance (inheritance of some properties from two sources).

Abstract Base Classes

An abstract class is a class that leaves one or more method implementations unspecifiedby declaring one or more methods abstract. An abstract method has no body (i.e., no

implementation). A subclass is required to override the abstract method and provide an

implementation. Hence, an abstract class is incomplete and cannot be instantiated, but

can be used as a base class.

abstract public class abstract-base-class-name

{

// abstract class has at least one abstract methodpublic abstract return-type abstract-method-name ( formal-params );

... // other abstract methods, object methods, class methods

}


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public class derived-class-name extends abstract-base-class-name {

public return-type abstract-method-name (formal-params) { stmt-list; }

... // other method implementations

}

It would be an error to try to instantiate an object of an abstract type:

abstract-class-name obj = new abstract-class-name(); // ERROR!

That is, operator new is invalid when applied to an abstract class.

Constructors in Java

All about allocating resources before an object is use And freeing resources when an object is

done.

Constructors are done right in Java and make a lot of sense.

Default Values

At object allocation

Java assigns each member var its default value

If you want, you can give an explicit initializationclass Foo

{private int a = 12;

private IDoubleVector b = new DenseDoubVector (2, 0);

private double c;

...

}

Initialized in order of declaration

And initialized before any constructor code is executed

Note: statics only initialized once, at first creation of object of that type


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Providing Initialization Code

Can have a block of code that is always run before constructor

class Foo

{

int a;

{

System.out.println (This codell run before the);

System.out.println (constructor.);

}

Foo () {

System.out.println (Here is the constructor.);

}

}Foo bar = new Foo ();

What does this do?

Note: can have block labeled static... what happens then?

Calling Super class Constructors

The default (no-param) superclass const. is automatically called

Invoked before anything else is done to the subclass

This can cause a chain of invocations, all the way back to Object

If you want another constructor, use call to super

Must be the first statement in a named constructor

class Foo extends Bar {

{System.out.println (Hi mom!);

}

Foo ()

{

super (2);


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System.out.println (Here is the constructor.);

}

} ...

Foo bar = new Foo ();

Interface

It defines a standard and public way of specifying the behavior of classes

Defines a contract

All methods of an interface are abstract methods

Defines the signatures of a set of methods, without the body (implementation of the methods)

A concrete class must implement the interface (all the abstract methods of the Interface)

It allows classes, regardless of their locations in the class hierarchy, to implement common

behaviors.

Why Interfaces?

To reveal an object's programming interface(functionality of the object) without revealing its

implementation

This is the concept of encapsulation

The implementation can change without affecting the caller of the interface

The caller does not need the implementation at the compile time

It needs only the interface at the compile time During runtime, actual object instance is associated with the interface type.


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Multi-Threading in java

Executing program with multiple threads in parallel

Special form of multiprocessing

Thread

sequentially executed stream of instructions Shares address space with other threads Has own execution context

Multiple threads in process execute same program also known as lightweight process.

Captures logical structure of problem May have concurrent interacting components Can handle each component using separate thread Simplifies programming for problem Better utilize hardware resources When a thread is delayed, compute other threads Given extra hardware, compute threads in parallel Reduce overall execution time

Creating Threads in Java

You have to specify the work you want the thread to do Define a class that implements the

Runnable interface

public interface Runnable

{

public void run();

}

Put the work in the run method Create an instance of the worker class and create a thread to run

it or hand the worker instance to an executor


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Thread Class

public class Thread

{

public Thread(Runnable R); // Thread R.run()

public Thread(Runnable R, String name);

public void start(); // begin thread execution

...

}

Creating Threads in Java

Runnable interface

Create object implementing Runnable interface Pass it to Thread object via Thread constructor

Examplepublic class MyT implements Runnable

{

public void run() {

// work for thread

}

}

Thread t = new Thread(new MyT()); // create thread

t.start(); // begin running thread

// thread executing in parallel


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Alternative (Not Recommended)

Directly extend Thread class

public class MyT extends Thread

{

public void run()

{

// work for thread

}

}

MyT t = new MyT(); // create thread

t.start(); // begin running thread

Java thread can be in one of these states

Newthread allocated & waiting for start() Runnablethread can execute Blockedthread waiting for event (I/O, etc.)

Terminatedthread finished

new

Transitions between states caused by

Invoking methods in class Threadstart(), yield(), sleep() Other (external) events Scheduler, I/O, returning from run()

New Runnable state

Blocked stateTermianted

state

IO,Slee

p,join

IO

COMPLETE,

P EXPIRED


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Java swings

What is Swing?

An API for Graphical User Interfaces (GUI)

Created to provide a more sophisticated set of GUI components than the Abstract

Windows Toolkit (AWT)

Part of the Java Foundation Classes (JFC)

Lightweightcomponents because they lookconsistent on platforms

GUI application tasks:

Call constructor of the JFrame superclass.

Get an object reference to the content pane container GUI objects are added to this pane

Set the layout manager to arrange GUI components in the window

Instantiate each component

Add each component to the content pane

Set the window size

Display the window

Swing Components:

JLabel displays an image or readonly text

JTextField singleline text box for input

JTextArea multiple line text box

JPasswordField single line for accepting passwords but not displaying what is typed

JButton command button

JRadioButton toggle one in a group

JCheckBox user selects 0, 1, or more options in a group

JList list of items to select 1 or more

JComboBox dropdown list to select one item


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Event Handling

GUIs are eventdrivenuser choose to act and the GUI responds via an event handler

To program for this we need to:

Write a listener (event handler)

Instantiate an object of that class

Register the listener on 1 or more components

What fires?

JTextField and JTextAreapressing enter; event object =ActionEvent

JButtonpressing the button; event object = ActionEvent

JRadioButton, JCheckBox, JComboBoxmaking a choice; event object = ItemEvent

JListselecting an item; event object = ListSelectionEvent

Any componentmouseup or mousedown or moving the mouse; event object = MouseEvent

Dialog Boxes in Swing

JDialog is directly descended from the Dialogclass

JDialog contains a rootPane hierarchy including a contentPane

All dialogs are modal, which means the current thread is blocked until user interaction with it

has been completed.

Types of Dialog Boxes

JOptionPane.showMessageDialog reports something that has happened to the user

JOptionPane.showConfirmDialogasks for a confirming response e.g. yes, no, cancel

JOptionPane.showInputDialog prompt the user for input


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Madame Management

In this project we are showing a Showroom Management functionality. In this Project We have

one panel: Admin Panel. Admin can insert ,update or delete customers to customer details and

also staff detais database.

We made this application in Core java and my database is MS SQL Server 2005. We have our

database in application folder App_data. To run this application just attaches this database on

your machine and change the connection string. Now when you run the application for the first

time the login page will show. If you have already registered with the site, then enter your

username and password and the application will redirect to your login page.

DATA FLOW DIAGRAMS

Madame

managment

Home

page

Login

page

billStaff

Information

Invent

oryCustome

r detail


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DATABASES

E

registratio

n

Inventory

S_id

name

available

required

F name

size

E id

Mobile

date

Email id

city

address

L nameC_id

name

phone

address

price

Work

experience

E mail id

address

P_no

Customer Staff

information

User


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SCREEN SHOTS OF PROJECT

Log-in Page: Customer and staff who are already registered will fill their username & password

otherwise they will get registered first by clicking on register button.


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Home page: our home page contains 4 buttons which are bill, customer details , inventory, staff

information.

Registeration page: Any new user will get registered first and then will be able to goto home

page.


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Staff info: This page will contain the general information about the staff members of showroom.

Customer details: This page will contains the basic information about customers .


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Inventory: This page will keep the record of number of items present in showroom as well as

required no. of items.

No. of items available/required :this page will help to know no. of item of that particular

product Present and required in showroom.


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java project report

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