music word's ppt

7/31/2019 Music Word's PPT

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PROJECT DETAIL

PROJECT NAME : CHAT SERVER

LANGUAGE : J2SE,jdk1.5

TOOLS : J CREATER, NOTEPAD++

MEMBERS : 3

MENTOR : KAMAL DEEP(Project Coordinator)


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DEPLOYMENT

BUSINESS LOGIC : JAVA FRAMEWORK,AWT

GRAPHICS,EVENTHANDLING

SERVER :LOCALHOST


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It is made completely on JAVA technologies like AWT,Socket Programming, File Handling, etc. AWT is usedhere for the design of the interface i.e. the easy touse n navigate GUI interface. Socket Programming

used here is for opening the port for data to be writtenby clients (ChatClient.jar) and reading the data (Byother client). File Handling is used here is for storingthe information that are needed in the course of theexecution of data (data.properties, server.properties)

like proxy details, room details, last login, host details,etc.

INTRODUCTION :-


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AWTEvent

Font

FontMetrics

Component

Graphics

Object Color

Canvas

Button

TextComponent

Label

List

CheckBoxGroup

CheckBox

Choice

Container Panel Applet

Frame

Dialog FileDialog

Window

TextField

TextArea

MenuComponent MenuItem

MenuBar

Menu

Scrollbar

LayoutManager

GUI Class Hierarchy (AWT)


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GRAPHICS

One of the most important features of Java isits ability to draw graphics.

We can write Java applets that can draw lines,figures of different shapes, images, and text indifferent fonts, styles, and colours.

Every applet has its own area on the screenknown as canvas, where it creates display.

Java coordinate system has the origin (0,0) in

the upper-left corner. Positive x values are tothe right and +ve y values to the bottom. Thevalues of (x,y) are in pixels.


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What is an Event?

GUI components communicate with the rest ofthe applications through events.

The source of an event is the component thatcauses that event to occur.

The listener of an event is an object that

receives the event and processes itappropriately.


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Handling Events

Every time the user types a character or clicksthe mouse, an event occurs.

Any object can be notified of any particularevent.

To be notified for an event,

The object has to be registered as an event

listener on the appropriate event source.

The object has to implement the appropriateinterface.


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Three Steps of Event Handling

1 Prepare to accept eventsimport package java.awt.event

2 Start listening for eventsinclude appropriate methods

3 Respond to events

implement appropriate abstract method


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Types of Events Below, are some of the many kinds of

events, swing components generate.

Act causing Event Listener Type

User clicks a button, pressesEnter, typing in text field

ActionListener

User closes a frame WindowListener

Clicking a mouse button, whilethe cursor is over a component

MouseListener


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Types of Events (contd..)

Act causing Event Listener Type

User moving the mouse over acomponent

MouseMotionListener

Component becomes visible ComponentListener

Table or list selection changes ListSelectionListener


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Adapter Classes

Time consuming to define all interface methods WindowListener has seven methods

What if we only want to use one?

Required to define all methods in interface

Adapter class implements an interface

Does anyone recognize a design pattern here?

Default implementation ({ }, empty body) for all methods

You then extend adapter class,

overriding methods for events you care about, such as

windowClosing. Has "is a" relationship with interface

WindowAdapter is a WindowListener

MouseAdapter is a MouseListener


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Execute ChatServer.jar.

Click on StartServer button.

Server and starting it


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LOGIN


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client application of CHAT SERVER


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THE WAY OF CHATTING


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PRIVATE CHATTING


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SELECT ROOMS

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