Java based simulator created for Free hand drawing using mouse

Java based simulator created for Free hand drawing using mouse - Transcript

PROJECT REPORT ON
Java based simulator created for Free hand drawing using mouse

Index
S No Contents Pg No
1 Theories involved
Introduction to java
Applet
awt
Multithreading
2 Proposed system
3 Feasability
4 Fact finding techniques
5 System Requirements
Hardware requirements
Software requirements
6 System Analysis
Entity Relationship Diagram
Data Flow Diagram
Class Diagram
Use Case Diagram
Activity Diagram
Component Diagram
7 Coding
8 User Manual
Input Screen Layout
Output Screen Layout
9 Limitations and Future Enhancements
10 Conclusion
11 Bibliography


Introduction to java
Java Programming basics
Java technology is
A programming language
A development environment
An application environment
A deployment environment
Syntax
class Class name


Javac it compiles the java file and converts it into class file
To compile javac FreeHand java
To run java FreeHand
Primary goals of java technology
Is object oriented to help you visualize the program in real life
It eliminates pitfalls of other programming languages
Speed development Reduces the complie link load test cycle
Code portability enables you to write code that can be run on multiple operating systems
Java technology architecture
JVM
Garbage collection
JRE
Java virtual machine
It is an imaginary machine that is implemented by emulating it in software on a real machine
Provides hardware platform to compile all java codes
It generates byte code that makes java platform independent
JVM Tasks
Loads code
Verifies code
Executes code
Java runtime environment
At runtime the byte codes that make java software programs are loaded checked and run in an interpreter
runtime
Applet
What is applet
Applet is a package that consist of small programs that are executed by using a Web browser or a tool such as the applet viewer
The applet viewer is included in the Java Development Kit JDK
The applet viewer reads the HTML and interprets the information that is contained between the applet tags
An applet must be a subclass of the java applet Applet class which provides the standard interface between the applet and the browser environment
An applet must be a subclass of the java applet Applet class which provides the standard interface between the applet and the browser environment
The life cycle of an applet
By calling certain methods a browser manages an
applet life cycle if an applet is loaded in a web page
init This method is intended for whatever initialization is needed for your applet
start This method is automatically called after init method It is also called whenever user returns to the page containing the applet after visiting other pages
stop This method is automatically called whenever the user moves away from the page containing applets You can use this method to stop an animation
destroy Called by the browser or applet viewer before the applet is terminated The stop method is invoked before destroy
Handling Events
To react to an event an applet must override the appropriate event specific method
Interfaces Key Listener Mouse Listener Text Listener Window Listener
Events Key Event Mouse Event Text Event Window Event
Multithreading
A multithreaded program contains two or more parts that can run concurrently Each part of such a program is called a thread
Each thread defines a separate part of execution
Multithreading is a specialized form of multitasking
Multithreading helps in speeding up computation of a program
Multithreading enables you to write very efficient programs that make maximum use of CPU because ideal time can be kept to the minimum
awt
AWT Abstract Window Toolkit provides support for applets and is also the foundation upon which Swing is built
It can also create stand alone windows that run in a GUI environment i e it provides a machine independent programming interface for applications
AWT classes are contained in java awt package
Object hierachy Every GUI component that appears on the screen is a subclass of abstract class Component or MenuComponent
The class Container is an abstract subclass of Component which permits other components to be nested inside it These components can also be containers permitting other components to be nested inside which creates a complete hierarchial structure Containers are helpful in arranging GUI components on screen The containers Panel and Frame are the containers that you use most often
Class hierarchy for panel and frame
PROPOSED SYSYTEM
The proposed system is supposed access the desktop of the remote machine Server to the machine on which it is running Client
This system is supposed to have two machines one as server and the other as client The Server will start and wait for a client to establish a connection Client requires server machine s IP address to connect
When a client connects to the server a connection is establish for that particular client Then server sends image of the desktop of the server machine
These images are sent after every specific time interval and update the client about the server s desktop status
FEASIBILITY STUDY
From the inception of ideas for a software system until it is implemented and delivered to customer and even after that the system undergoes gradual developments and evaluations
The software is said to have life cycle composed of several phases At the feasibility stage it is desirable that two or three different configuration will be pursed that satisfy the key technical requirement but which represent different level of ambition and cost
Feasibility is the determination of whether or not a project is worth doing A feasibility study is carried out select a best system that mate performance requirements
The data collected during primary investigation examines system feasibilities that are likelihood that the system will be beneficial to the organization Four tests for feasibility study are as follows
Technical Feasibility
This is concerned with specifying equipment and software that will successfully satisfy the use considerably but might include
The feasibility to produce output in a given time because system is fast enough to handle multiple users
Response time under certain circumstances and ability to process a certain volume of transaction of a particular speed
Feasibility to communicate data to distant location
Economical Feasibility
Economic analysis is the most frequently used technique used for evaluating the effectiveness of a proposed system More commonly known as cost benefit analysis the procedure is to determine the benefits and savings that are expected from a proposed system and compared them with cost Though the cost of installing the system may appear high it is one time investment The resulting benefit is that automation results in turn around time The resulting cost benefit ratio is favorable
Operational Feasibility
It is mainly related to human organizational as social aspects The points to be considered are
The system interface is standard
It is user friendly
Provides extensive help Hence no training is required
FACT FINDING TECHNIQUES
The very first step in the field of system analysis and design is to collect the information regarding the system Success of any requirement depends on availability of accurate reliable information The fact finding techniques used for this project are as follows
Observation Interview
In this method the flow of system the way of executing processes steps practically followed in actual scenario etc are observed Through observation of systems where virtual network computing is used for accessing remote terminals we were able to understand the layout working functionality of the system We interviewed people who actually use such systems to know how useful this system is to be able to understand its full fledged functionality
SYSTEM REQUIREMENTS
Hardware Requirements
Processor type Intel R Core TM 2 Duo Processor
Processor cache size 2048 Kb
Memory 3 GB RAM
Memory speed 667 Mhz
Memory Technology DDR2 SDRAM
Hard Disk 250 GB HDD
Mouse Standard Serial Mouse
Keyboard 101 104 Keys
Software Requirements
Operating System Windows XP
Software JVM JDK 1 5 1
E R diagram

Component diagram
Class diagram
It depicts methods in addition to attributes
Activity diagram of applet
This depicts the flow of tasks between various components of a system
USE CASE diagram
This shows the interaction between users and the system in particular the steps of tasks that users perform
SOURCE CODE
import java awt
import java awt event
import java awt geom
import java awt image BufferedImage
import javax swing
import javax swing event

public class FreeHand extends JPanel

BufferedImage image
Color color
Stroke stroke

public FreeHand

color Color blue
stroke new BasicStroke 1f BasicStroke CAP BUTT
BasicStroke JOIN MITER


protected void paintComponent Graphics g

super paintComponent g
if image null
initImage
g drawImage image 0 0 this


public void draw Point start Point end

Graphics2D g2 image createGraphics
g2 setRenderingHint RenderingHints KEY ANTIALIASING
RenderingHints VALUE ANTIALIAS ON
g2 setPaint color
g2 setStroke stroke
g2 draw new Line2D Double start end

JPanel panel new JPanel new GridLayout 1 0
for int j 0 j colors length j

JButton button new JButton
button setFocusPainted false
button setBackground colors j
button addActionListener l
panel add button

return panel


private JPanel getControlPanel

JButton clear new JButton clear
clear addActionListener new ActionListener

public void actionPerformed ActionEvent e

clearImage


final JSlider slider new JSlider JSlider HORIZONTAL 1 6 1
slider addChangeListener new ChangeListener

public void stateChanged ChangeEvent e

float value Integer slider getValue floatValue
stroke new BasicStroke value BasicStroke CAP BUTT
BasicStroke JOIN MITER


JPanel panel new JPanel
panel add new JLabel stroke
panel add slider
public void mouseDragged MouseEvent e

Point p e getPoint
freeHand draw start p
start p



Limitations Future Enhancements

Conclusion

Bibliography

In this project the drawing is restricted to only free hand drawing We can add more number of menu options
The project now does not feature a tool bar which can be included as a side bar
We can have options like drawing circles rectangles squares ovals polygons etc
A color menu can also be added
Also a scroll bar can be added in order to make the frame work larger
Currently the project is restricted to only drawing The project can be enhanced to make the free hand drawing act as an memory image source for animation
In this project i e a simulator created for free hand drawing using mouse the various graphical methods functions classes and instance varialbles have been explored
It has a graphical user interface built
This is used to create drawings on a blank canvas
Books
The complete reference java J2SE Herbert Schildt
Teach yourself java
Programming with java E Balaguruswamy
The sun java Sun microsystems
Database system concepts Silbertschatz Korth and Sudarshan
Website
www google com
www sun com
Introduction to java
Networking
Advanced io streams
ADVANCED JAVA PROGRAMMING
DEVELOPING GRAPHICAL USER INTERFACE
BUILDING APPLICATIONS
MORE OBJECT ORIENTED PROGRAMMING
GUI based applications
Text based applications
Arrays
Exceptions Assertions
GUI event handling
Advanced class features
threads
Identifiers keywords
Class design
Expressions flow control
Building java GUI
OOP
Getting started
Loads from
Hard disk
Network
Other
source
compile
Class loader
Runtime
interpreter
Bytecode
verifier
Hardware
FreeHand class
javac
FreeHand java