final report java

8/6/2019 Final Report Java

http://slidepdf.com/reader/full/final-report-java 1/36

Introduction

Speedy and efficient information processing is crucial to our socially and highly

developed technology. Computer can help the intolerable burden of handling the ever increasing amount or information with government department, public services and

business concerns expected to contain because of their ability to analyze information

as well as to retain, update and reproduce it because of their versality to present it in a

variety of forms. This may also to some extent lead to problems occurring due to

information explosion.

About Project

POST OFFICE works in every walk of our life. Through the automation of thissystem one can easily generate the information about the customer available and also

about the old records.

For this efficient software the first and the foremost thing is that all the requirements

should be known before hand and the developer should devote its effort for the

completion of that requirement which are demanded by the customer should be

fulfilled. This system can be used in various education departments and can distribute

the copies of the system among the management and staff members for the required

information of their customer.

This very handy project for any user and includes following features:-

● Having customer information and total amount payable.

● for the help of user it displays each and every detail about required topics

● Maintains all the old record for later reference

● Have provision for automatic update as per the status

● System must handle user enquiry

1



Software Development Life Cycle

The Software Development Life Cycle, as outlined by Edward Yourdon in his book

modern structure analysis (1989) has been followed in this project with minor

modifications. The modified life cycle is shown overleaf.

The life cycle consists of the following activities:

1) SURVEY- This activity is also known as feasibility study. It begins with a

request from the user for a new system. It involves the following:

● Identify the responsible user for a new system.

● Clarify the user request

● Identify deficiencies in the current system

● Establish goals and objectives of new system

● Determine the feasibility for new system

● Prepare the project charter which will guide about the remainder of the

project

2) SYSTEM ANALYSIS – The objective of the system analysis activity is todevelop structured system specification for the proposed system. The

structured system specification should describe what the proposed system

would do; independent of the technology which will be used to implement

these requirements. The structured system specification will be used to

implement these requirements. The structured system specification will be

called the essential model (also known as logical model).

The essential model may itself consist of multiple models, modeling different

aspect of the system. Generally three models used for such purpose are:-

● DATA FLOW DIAGRAM (DFD) – It models the functioning of the

system. DFD may consist of following

● Context diagram

● Leveled Data Flow Diagram

● Process specification for Elementary Bubble

● Data dictionary for the flows and stores on the DFD

● ENTITY RELATIONSHIP DIAGRAM – It models the functioning

of the data and their relationship.

● STATE TRANSITION DIAGRAM – It models the time dependent behavior of the system.

2



3) PRELIMINARY DESIGN – This activity deals with certain design

issues, which are to be finalized in consultation with user. The two most

common design issues of relevance to the user are the automation boundary and the human machine interface. The output of the activity is the

user implementation model. The major part of the user implementation model

is the specification for the user interface of the proposed system. The user

implementation model is also referred to as the physical model of the proposed

system. The model, in addition to the essential model , defines the following

for the proposed system:

● Automation boundary

● Report layouts

● Layouts of the source documents

● Screen Layouts for the data entry form

● Menu

4) SYSTEM DESIGN – System design involves transformation of the user

implementation model into software design. The design specifications of the

proposed system consist of mainly database schema.

5) IMPLEMENTATION – This activity includes programming, testing and

integration of modules into a progressively more complete system.

6) ACCEPTANCE TEST GENERATION – This activity generates a set

of data that can be used to test the new system before accepting it.

7) QUALITY ASSURANCE – Assurance is also known as final testing.

This activity requires, as its input acceptance test data generated in acceptancetest generation and an integrated system produced by implementation.

3



About the current system

Advantages of the current systemThe project Post office management system is created in 4GL GUI based system so

that it is easy to handle. It also increases the efficiency of the end user, because it will

reduce the reluctant jobs, which are tedious to complete. The Post office

management system also has automated capability to complete job, it automatically

generates the reports, so it reduces the work manually.

Advantages of POST OFFICE MANAGEMENT SYSTEM:-

1. This system will improve the performance of the company.

2. It reduces the tedious jobs like reluctant work, long procedures, automated

report generation, up to date information.

3. It will improve the Post Office Management, since all the information is

available whenever required.

4. It provides quick processing thus helps in transaction and updating in master

records can be performed in few records.

5. It allows easy generation of all types of reports.

6. It provides accurate output.

7. It gives fast answer of queries.

8. The amount of paper is reduced.

9. Better security

10. Economical.

11. Better Control.

4



Deficiencies of the manual system:

1. Lack of immediate retrieval of information - In manual system, lot of time is

wasted in retrieving information. Much searching is required before required is

found. This wastes a lot of time of the user as well as the person.

2. Lack of immediate information storage – In manual system, it is difficult to store

information at proper place at that very moment. This is because the person is

unable to quickly locate the place where the information is to be stored.

3. Prompts updating not possible – Changes are quite natural in all walks of life.

Information and stored data also changes from time to time. These changes

should be incorporated in the working also to keep the information up to date.

However, bringing about changes through the manual system is a slow and

tedious process because of which inaccurate information storage occurs.

4. Unplanned working – The manual system lacks the element of planned working.

Records are not properly maintained. This creates a lot of problems at times like

during information retrieval and storage

5. Insignificant generation of managerial and strategic reports. – In manual system,

reports for management are difficult to be generated and strategic reports are

impossible. This is because for these reports proper storage of information, its

retrieval and its filtering are very important and very tough in manual system.

6. Accuracy – The manual system lacks accuracy in working and a number of

operations may be performed incorrectly, the computations that are done in theorganization may be incorrect and whatever are generated in the system may be

inaccurate.

7. Reliability – The reliability of the manual system is considered to be low because

of the above given reasons including the fact that ‘TO error is human’. Any task

that is performed by men, always contain the risk of errors.

8. Redundancy of information – In manual system, particular information may be

stored at a number of places, lending to redundancy. Redundancy of data or

information creates a number of problems storage space is wasted; changes at one

place are to be made at a number of places and so on.

5



Goals of the proposed system

1. Immediate retrieval of information – The main objective of the new system is

to provide for quick and efficient retrieval of information, any type of

information would be available to the user whenever he requires. Facilitywould be provided for online query to cut down on the response time greatly.

2. Immediate storage of information – In the proposed system, it will be easy to

store information at any given time at the correct places. The location of

storage would be easily available and user will face no difficulty.

3. Prompt updating of information – In the proposed system, the information will

always remain up to date as the updating will be prompt and without any

efforts. This factor will be of great importance in the proposed system as it

determines the integrity of the information stored.

4. Fast computation of information – The computation of information will be

quite fast in the proposed system. Not only mathematical calculations, but also

logical comparisons will be quick in the new system.

5. Planned approach toward working – The working is the service center

information system will be well planned and organized. The data will be

stored properly in the data store which will help in retrieval of information as

well as in its storage.

6. Generation of managerial and strategic reports – The new system would provide for regular generation of reports which would help the management in

decisions making work and in controlling the over-all working of the

organization. The generation of these reports would be possible only if the

system is organized such that retrieval of information can be made on

conditions.

7. Accuracy – The level of accuracy in the new proposed system would be

higher. All operations and computations would be done correctly and this will

ensure that whatever information is coming from the center, it is accurate.

8. Reliability – The reliability of the proposed system would be high due to theabove stated reasons. The reason for the increased reliability of the system is

that now there would be proper storage of information, its maintenance would

be well managed and retrieval would be possible in the desired manner.

9. Non Redundant Information – In the new system, utmost care be taken that no

information is repeated, any usage of storage or otherwise. This would assure

economic usage of storage or space and consistency in the data stored. This

will also help make those changes easily as the change would have to be made

only at that very place and no where else.

6



HARDWARE AND SOFTWARE REQUIREMENTS

To make the application smoothly and can be used to its optimum level following

Hardware and Software requirements are required:

• 128 MB of RAM

• PENTIUM III processor or equivalent or higher versions.

• At least 5GB of Hard disk.

• Java Run Time Environment(JRE) – jdk1.5 (As Front End Tool)

• MS ACCESS

7



Tools and Platforms

Stay with us on academic presentation on “POST OFFICE MANAGEMENT

SYSTEM”. This project is developed on Java Platform using the database technology

at its core. As the images and graphics give more appealing effect to the eyes of theuser then the other conventional format, so as to make project more effective and to

make the project to able to store the information about various entities involved. The

project incorporates the use of software tools like:-

JAVA Language – Front End

MS-ACCESS – Back End

The Front end is the software which manages the logical representation of data which

Back end manages to manipulate and store data.

8



Introduction

What is java?Java is a general purpose object oriented programming language . It is the first

programming language that is not tied to any particular hardware or operatingsystem .The language is based on the concept of an object. Java is highly derived

from C++ . Most striking feature of the language is that it is platform neutral

language.

There were five primary goals in the creation of the Java language:

• It should use the object-oriented programming methodology.

• It should allow the same program to be executed on multiple operating systems.

• It should contain built-in support for using computer networks.

• It should be designed to execute code from remote sources securely.

• It should be easy to use and borrow the good parts of older object-oriented

languages like C++.

Java toolsIn order to write java application or applets ,one need more than a language . The

tools that lets one to write , test , debug programs.

Java features● Compiler and Interpreted

● Platform independent

● Simple● Secure

● Familiar

● Portable

● Object-Oriented

● Robust

● Multithreaded

● High performance

● Distributed

● Dynamic

Compiler and Interpreted - There is a java compiler , named javac . The java

compiler takes input source code files (these files typically have the ext.java) and

converts them into compiled bytecode files.The java Interpreter known as javac can

be used to execute java application .The interpreter translates bytecode directly into

program actions.

Platform independent - Java programs can be easily moved from one computer to

another, anywhere and anytime.Changes and upgrades made in operating systems,

processors and system resources will not force any changes in java programs.

Simple - Java is designed to be easy for programmer to learn and use efficiently.

9



Secure- When we use a java compatible web browser, we can safely download java

applets without fear of virus infection. Java achieves this protection by confining a

java program to java execution environment and not allowing it access to other parts

of the computer.

Familiar- It is modeled on C, C++ languages. Java code looks like C++.

Portable- Java compiler generates bytecode instructions that can be implemented on

any machine and also the size of the primitive data types are machine independent.

Object-Oriented - Java is a true object-oriented language. All program code and

data reside within objects and classes.

Robust -It provides many safeguards to ensure reliable code. It has strict compile

time and run time checking for data types. Designed as a garbage-collected language

relieving the programmers and also incorpates the concept of exception handlingwhich captures series errors.

Multithreaded - Java supports handling multiple tasks simultaneously which greatly

improves the interactive performance of graphical applications.

High performance - Java performance is impressive for an interpreted language ,

mainly due to use of immediate bytecode . Use of multithreaded and further its

architecture is also designed to reduce overheads during runtime.

Distributed - It has ability to share both data and programs. Java applications canopen and access remote objects on internet which enables multiple programmers at

multiple remote locations to collaborate and work together on single project.

Dynamic - Java is capable of dynamically in new class libraries , methods and

objects .It supports functions written in other languages like C,C++ called as native

methods.

Automatic garbage collection - One idea behind Java's automatic memory

management model is that programmers should be spared the burden of having to

perform manual memory management. In some languages the programmer allocates

memory to create any object stored on the heap and is responsible for later manually

deallocating that memory to delete any such objects. If a programmer forgets to de-

allocate memory or writes code that fails to do so in a timely fashion, a memory leak

can occur: the program will consume a potentially arbitrarily large amount of

memory. In addition, if a region of memory is de-allocated twice, the program can

become unstable and may crash.

In Java, this potential problem is avoided by automatic garbage collection. The

programmer determines when objects are created and the Java runtime is responsible

for managing the objects' lifecycle. The program or other objects can reference anobject by holding a reference to it (which, from a low-level point of view, is its

10



address on the heap). When no references to an object remain, the Java garbage

collector automatically deletes the unreachable object, freeing memory and preventing

a memory leak. Memory leaks may still occur if a programmer's code holds a

reference to an object that is no longer needed—in other words, they can still occur

but at higher conceptual levels.

Comparing Java and C++, it is possible in C++ to implement similar functionality (for

example, a memory management model for specific classes can be designed in C++ to

improve speed and lower memory fragmentation considerably), with the possibly cost

of extra development time and some application complexity. In Java, garbage

collection is built in and virtually invisible to the developer. That is, developers may

have no notion of when garbage collection will take place as it may not necessarily

correlate with any actions being explicitly performed by the code they write.

Depending on intended application, this can be beneficial or disadvantageous: the

programmer is freed from performing low-level tasks but at the same time lose the

option of writing lower level code.

Java Magic: The Bytecode

Bytecode is a highly optimized set of instruction designed to be executed by the java

runtime system, which is called Java Virtual Machine and it exists only inside the

computer memory.

Source code Bytecode

Process of Compilation

Virtual Machine Real Machine

Process of converting Bytecode into Machine code

Object Oriented ProgrammingObject Oriented Programming is an approach that provides a way of modularizing

programs by creating partitioned memory area for both data and functions that can be

used as templates for creating copies of such modules on demand.

Objects and Classes - An object is a software bundle of variables and related

methods. Objects are key to understanding object-oriented technology. Real-worldobjects share two characteristics: They all have state and behavior. Software objects

Java Compiler Virtual MachineJava Program

Bytecode Java Interpreter

11

Machine code



are modeled after real-world objects in that they too have state and behavior. A

software object maintains its state in one or more variables. A variable is an item of

data named by an identifier. A software object implements its behavior with methods.

A method is a function (subroutine) associated with an object. In the Java

programming language, an object can specify one of four access levels for each of its

variables and methods.A class is a blueprint that defines the variables and the methods common to all objects

of a certain kind. After you've created the class, you can create any number of objects

from that class. When you create an instance of a class, the system allocates enough

memory for the object and all its instance variables. Each instance gets its own copy

of all the instance variables defined in the class.

Classes can also define class variables. A class variable contains information that is

shared by all instances of the class .A class can also declare class methods. You can

invoke a class method directly from the class, whereas you must invoke instance

methods on a particular instance.

Encapsulation - Wrapping of data and methods into a single unit is known as

encapsulation. It is the most striking feature of class. The data is not accessible to

outside world and only those methods which are wrapped in the class can access it.

The insulation of the data from direct access by the program is called data hiding.

Inheritance - Inheritance is the process by which objects of one class acquire the

property of objects of another class. Each subclass inherits state .However, subclasses

are not limited to the states and behaviors provided to them by their superclass.

Subclasses can add variables and methods to the ones they inherit from the superclass.

It supports the concept of hierarchical classification it also provides the use of

reusability. .

Polymorphism - This means the ability to take more than one form. An operation

may exhibit different behaviour in different instances. The behaviour depends upon

the types of data used in the operation. It plays an important role in allowing objects

having different internal structures to share external interface.

12



VERSION HISTORY

JDK 1.0(January 23, 1996) — Initial release.

JDK 1.1(February 19, 1997) - Inner classes added to the language

J2SE 1.2(December 8, 1998) — Codename Playground. J2SE 5.0 were

rebranded Java2 and the version name "J2SE" (Java 2 Platform, Standard

Edition) replaced JDK to distinguish the base platform from J2EE (Java 2

Platform, Enterprise Edition) and J2ME (Java 2 Platform, Micro Edition).

J2SE 1.3(May 8, 2000) — Codename Kestrel.

J2SE 1.4(February 6, 2002) — Codename Merlin.

J2SE 5.0(September 30, 2004) — Codename Tiger.(Originally numbered1.5, which is still used as the internal version number.[1])

Java SE 6 — Codename Mustang. As of 2006 this is currently in

development under JSR 270. A beta version was released on February 15,

2006.Beta 2 was released on June 15, 2006 and is available at

http://java.sun.com/javase/downloads/ea.jsp.

The final release is expected autumn 2006.

Java SE 7 — Codename Dolphin. This is in the early planning stages. The

Dolphin Project will start up in late July, with release estimated in 2008.[3]

13



Type 1 Driver - JDBC-ODBC bridge

The JDBC type 1 driver, also known as the JDBC-ODBC bridge, is a database driver

implementation that employs the ODBC driver to connect to the database. The driver

converts JDBC method calls into ODBC function calls.

The driver is platform-dependent as it makes use of ODBC which in turn depends on

native libraries of the underlying operating system the JVM is running upon. Also,

use of this driver leads to other installation dependencies; for example, ODBC must be installed on the computer having the driver and the database must support an

ODBC driver. The use of this driver is discouraged if the alternative of a pure-Java

driver is available. The other implication is that any application using a type 1 driver

is non-portable given the binding between the driver and platform. This technology

isn't suitable for a high-transaction environment. Type 1 drivers also don't support the

complete Java command set and are limited by the functionality of the ODBC driver.

MS Access JDBC Driver -- Connecting MS Access withJava

Download MS Access JDBC driver here.

To connect Java with MS Access, you need a JDBC driver. Although Microsoft do

not produce a JDBC driver for MS Access, you can use the Easysoft JDBC-ODBCBridge as a MS Access JDBC driver. Use the JDBC-ODBC Bridge to provide the

connectivity layer between your Java code and MS Access database. The MS Access

database can be on the same machine as your Java or a remote machine.

Accessing MS Access from Java

This tutorial shows how to access MS Access databases from Java.

Contents

• Prerequisites• Assumptions• Configuring the Microsoft Access ODBC Data Source• Running the Demo Application• Common Problems

14



Prerequisites

• An installed and licensed Easysoft JDBC-ODBC Bridge (JOB) server on a

supported Windows platform that has Microsoft Office installed.

If you have not yet installed the JOB software or you are having problemswith the installation, use our Getting Started Guide to help you through the

installation.

• An existing Access database file (.mdb) on the Windows machine.

Assumptions

• You accepted the default options during the install.

• This tutorial was written assuming the demonstration clients were installed on

the same Windows machine as the JOB server.

You can check to see if you have these installed by choosing Start >

Programs > Easysoft > JDBC-ODBC Bridge.

From here you should see both an Applet demo and an Application demo.

• We have also assumed that you have installed the JOB software as a valid

Windows User who has access to the target database.

Left side, Type 4: Direct-to-Database Pure Java Driver This style of driver converts JDBC calls into the network protocol used

directly by DBMSs, allowing a direct call from the client machine to the

DBMS server and providing a practical solution for intranet access.

Right side, Type 3: Pure Java Driver for Database MiddlewareThis style of driver translates JDBC calls into the middleware vendor's

protocol, which is then translated to a DBMS protocol by a middleware server.

The middleware provides connectivity to many different databases.

15



The graphic below illustrates JDBC connectivity using ODBC drivers and

existing database client libraries.

Left side, Type 1: JDBC-ODBC Bridge plus ODBC Driver This combination provides JDBC access via ODBC drivers. ODBC binary

code -- and in many cases, database client code -- must be loaded on each

client machine that uses a JDBC-ODBC Bridge. Sun provides a JDBC-ODBC

Bridge driver, which is appropriate for experimental use and for situations in

which no other driver is available.

Right side, Type 2: A native API partly Java technology-enabled driver This type of driver converts JDBC calls into calls on the client API for Oracle,

Sybase, Informix, DB2, or other DBMS. Note that, like the bridge driver, this

style of driver requires that some binary code be loaded on each client

machine.

.

Partnering for Progress

Sun worked with an array of companies in the industry to create and rapidly establishthe JDBC API as the industry-standard, open interface for Java applications to access

databases.

Industry MomentumLeading database, middleware and tool vendors have been building support for JDBC

technology into many new products. This ensures that customers can build portable

Java applications while choosing from a wide range of competitive products for the

solution best suited to their needs. See the Industry Support page for a list of

companies that are shipping products with support for JDBC technology.

16

https://java.sun.com/products/jdbc/reference/industrysupport/index.html

https://java.sun.com/products/jdbc/reference/industrysupport/index.html



Advantages of JDBC Technology

Leverage Existing Enterprise DataWith JDBC technology, businesses are not locked in any proprietary architecture, and

can continue to use their installed databases and access information easily -- even if it

is stored on different database management systems.

Simplified Enterprise Development The combination of the Java API and the JDBC API makes application development

easy and economical. JDBC hides the complexity of many data access tasks, doing

most of the "heavy lifting"for the programmer behind the scenes. The JDBC API is

simple to learn, easy to deploy, and inexpensive to maintain.

Zero Configuration for Network ComputersWith the JDBC API, no configuration is required on the client side. With a driver

written in the Java programming language, all the information needed to make a

connection is completely defined by the JDBC URL or by a DataSource objectregistered with a Java Naming and Directory Interface (JNDI) naming service. Zero

configuration for clients supports the network computing paradigm and centralizes

software maintenance.

Relating JDBC to ODBC -There is a very close relationship between API and JDBC architecture and (open

database connectivity) ODBC counterparts. The JDBC –ODBC bridge enables you to

access databases using ODBC drivers from JDBC . JDBC –ODBC bridge effectively

translate the JDBC API calls into the corresponding ODBC calls . ODBC drivers are

available for almost all types of databases. JDBC can access almost all databases .

Because of their common ancestry they share some important components:-

Driver

manager

Loads database drivers and manages the

connections between the application and

the driver Driver Translates API calls into operations for a

specific data source

Connection A session between an application and a

database

Metadata Information about returned data , database

and driver

Resultset Logical set of columns and rows of datareturned by executing a statement

17



The JDBC architecture is based on a collection of java interfaces and classes that together

enable you to connect to data sources , to create and execute SQL statements and to retrieve

and modify data in a database.

JDBC-ODBC Bridge Driver The JDBC-ODBC Bridge –“sun.jdbc.odbc.jdbcodbcDriver”-is included with JDK and it

enables Java applications to access data through drivers written to the ODBC standard. The

driver bridge is useful for accessing data in data sources for which no pure JDBC drivers exist.

The bridge works by translating the JDBC methods into ODBC function calls.

Key Features

• Full Access to MetadataThe JDBC API provides metadata access that enables the development of

sophisticated applications that need to understand the underlying facilities and

capabilities of a specific database connection.

No InstallationA pure JDBC technology-based driver does not require special installation; it is

automatically downloaded as part of the applet that makes the JDBC calls.

Database Connection Identified by URLJDBC technology exploits the advantages of Internet-standard URLs to identify

database connections. The JDBC API includes an even better way to identify and

connect to a data source, using a DataSource object, that makes code even more

portable and easier to maintain.

Driver Manager Connection Statement ResultSet

Driver

DatabaseDatabase

18



In addition to this important advantage, DataSource objects can provide

connection pooling and distributed transactions, essential for enterprise database

computing. This functionality is provided transparently to the programmer.

Included in the Java PlatformAs a core part of the Java 2 Platform, the JDBC API is available anywhere that

the platform is. This means that your applications can truly write database

applications once and access data anywhere. The JDBC API is included in both

the Java 2 Platform, Standard Edition (J2SE) and the Java 2 Platform, Enterprise

Edition (J2EE), providing server-side functionality for industrial strength

scalability.

19



Abstract Windowing Toolkit

The windowing packageThe AWT is a very portable windowing library. It is a standard part of java

environment and provides all the basic functionality

one would expect to use in a modern windowing system .The AWT defines windows

according to a class hierarchy that adds functionality and specificity with each level.

The AWT package allows you to develop window-like applications. It allows your

applications to run on different windowing systems. The classes in AWT package will

allow you to:-

• Generate Colors.• Draw graphics.

• Add GUI components like push buttons, scrollbars etc to your applications.

• Handle user input from mouse and keyboard.

• Create Containers.

• Classes like Layout Managers helps in automatically positioning a GUI object

when we add it to the container.

20



frame and Component –frame extends the AWT class Frame. It contains

additional features that enable it to support Swing components. Component extends

the AWT component and Container classes. It is the top level class for all components

and provides pluggable look and feel.

Here are some of the component classes:

CLASS DESCRIPTION

Abstract Button Abstract super class for Swing buttons.

Button Group Encapsulates a mutually exclusive set of

buttons.

Image Icon Encapsulates an icon.

Button The push button class.

CheckBox The check box class.

ComboBox Encapsulates a combo box .

Labels The version of a label.

RadioButton The version of a radio button.

ScrollPane Encapsulates a scrollable window.

TabbedPane Encapsulates a tabbed window.

TextField The version of Text field.Tree Encapsulates a tree based-control.

Here are the some of the components used:

● Icons – Icons are encapsulated by the Image Icon class, which paints an icon from

an image.

● Label – Labels are the instances of the Label class which extends Component. Itcan display text or icon. These are passive controls that do not support any interaction

with the user.

● TextFields – Text field is encapsulated by the TextComponent class which

extends Component. TextField allows you to edit one line of text.

● Button –Button class provides the functionality of a push button. Button allows

an icon of string to be associated with the push button.

● CheckBox – It is supported by the CheckBox class. It is a control that is used toturn an option on or off.

21



● TextArea - Text area is encapsulated by the JTextComponent class which

extends Component. TextArea allows you to edit multiline of text.

● RadioButton – it is supported by the RadioButton class. It can be configured

into a group of check boxes in which only one check box can be checked at any onetime.

● ComboBox – It is provided through the ComboBox class. It normally displays

one entry and can also display a drop down list that allows a user to select a different

entry.

● ScrollPane – It is a component that presents a rectangular area in which a

component may be viewed. These are implemented in by ScrollPane class.

● Tree - It is a component that presents a hierarchical view of data. A user hasability to expand individual subtrees. These are implemented in Swing by Tree class.

Data Flow Diagram

22



FORMS LAYOUT

23



WELCOME WINDOW

24



USER-ID

25



OPTION WINDOW

26



PARCEL FORM

27



MONEY ORDER FORM

28



SPEED POST FORM

29



REGISTRY FORM

30



E-CARD FORM

31



32



DATA BASE DIAGRAM

hhh

33



LIMITATIONS

Although I have tried to do the best and try to do well all the things that are possible

in a Payroll System, but still the system contains some of the limitations.

The reason of these limitations is the time constraints. Time is the major problem. I

have to deliver the project in a particular time period. That’s why I have to leave some

topics that actually I want to cover, I am still working on this software and my next

goal is to remove these limitations and develop a more efficient and elegant system.

Limitations of the system:-

● this project does not support Multi-User System.

● the information of expenses is not included in this project.

After removing these and other minor limitations I hope this project will be very

efficient and effective.

34



Conclusion

The computer program “POST OFFICE MANAGEMENT SYSTEM” has been

designed basically for the government departments, private companies and other

institutions.By entering the required data one can easily generate the information about the

customer and all the old records as well as other services provided through the

system. As provided in the introduction we can do many required works on it but it is

not based on a particular post office management system as common idea is taken into

consideration while preparing this project so to implement it to any post office it may

require some modifications as per the requirements.

Still surely it will be provided as a great help to any post office system and will

automate his/her work completely motivating them to work more efficiently.

35



BIBLIOGRAPHY

final report java

Documents