This document provides information about applet programming in Java. It discusses that applets are small Java programs used primarily for internet computing. Applets can perform tasks like displaying graphics, playing sounds, and accepting user input. Key differences between applets and standalone applications include applets not having a main method, needing to be embedded in an HTML page, and having restrictions on file/network access. The document also covers the applet lifecycle, writing applet code, and using HTML tags to embed applets in web pages.
An applet is a Java program that runs within a web browser. Applets are embedded in HTML pages and run in a sandbox that prevents them from accessing the local computer's file system for security reasons. When writing an applet, you extend the JApplet class and override certain methods like init(), start(), stop(), destroy(), and paint() that are called at different points in the applet's lifecycle by the browser. The paint() method is used for any drawing or graphics output from the applet.
This document provides information on Java programming using applets. It discusses that Java can be used to create applications and applets, with the key difference being that applets run within a web browser. The document then covers the basics of how applets work, including their lifecycle of init(), start(), stop(), and destroy() methods. It provides an example "Hello World" applet code and discusses how to compile and run an applet using an HTML file and the appletviewer tool.
An applet is a small Java program that runs in a web browser. It allows for interactive graphics and animation to be embedded in HTML pages. Applets differ from standalone Java applications in that they have no main method and run within the context of a web page. The lifecycle of an applet involves initialization, starting, stopping, and destruction as the user interacts with the web page. Parameters can be passed to applets using the <param> tag in HTML. The applet code uses methods like init(), paint(), start(), and stop() to control its execution and display output.
This document provides an overview of Java applets including:
- Applets are programs that run in web browsers under control of the browser to provide interactive experiences on web pages.
- The lifecycle of an applet involves initialization, starting, stopping, and destruction controlled by the browser through specific methods.
- Security restrictions are placed on applets to prevent them from compromising the user's system.
This document provides information about Java applets including:
- An applet is a Java program that can be embedded in a webpage and runs in the browser. It allows websites to be more dynamic and interactive.
- All applets extend the Applet class. They have a lifecycle of init(), start(), paint(), stop(), destroy() methods that are called in a certain order.
- The paint() method redraws the applet output. stop() suspends threads when the applet is not visible and start() resumes them. destroy() removes the applet from memory.
- An applet is invoked by embedding directives in an HTML file using the <applet> tag. The
This document discusses Java applets and their life cycle. It explains that applets are subclasses of Applet that run in web browsers rather than via a main method. The life cycle of an applet involves initialization, start, paint, stop, and destroy methods. It provides an example "Hello World" applet code and explains how to compile, embed in an HTML file, and run it using an applet viewer. Finally, it contrasts applets and applications, noting that applets have limited system access for security while applications are fully trusted and run via a main method.
This document provides an overview of applet programming in Java. It discusses what applets are, how they are executed, their lifecycle methods, and how to pass parameters to applets. It also covers how to request repainting of an applet window, use the status window, and transfer control to other URLs using the AppletContext interface and showDocument method. Key aspects of the APPLET tag for embedding applets in HTML are also explained.
The document discusses Java applets and their core components. It explains that applets are Java programs that run within web browsers. Applets have a lifecycle of initialization, starting, painting, and stopping methods. The document provides details on how to write, compile, and embed a basic "Hello World" applet in an HTML file for testing. It also covers key classes like Graphics, Color, and Font used for applet graphics and UI.
The document discusses applet programming in Java. It defines an applet as a special type of Java program that runs in a web browser. There are two types of applets: local applets that run on the local machine, and remote applets that run on a web server. The document outlines the applet lifecycle and methods, how applets differ from other applications, the steps to develop an applet, and how to run an applet using an HTML file or the applet viewer tool.
An applet is a Java program that runs in a web browser. It extends the Applet class and does not define a main method. Applets are embedded in HTML pages and have a lifecycle of init(), start(), stop(), and destroy() methods. They can use the Graphics class to draw shapes, text, and images. Parameters can be passed to applets from the HTML code.
Applets allow Java programs to be run within web browsers. An applet is a Java class that extends Applet and overrides certain methods like init(), start(), stop(), and paint(). These methods control the applet's lifecycle and graphics rendering. Applets are subject to security restrictions like not being able to access the local file system. They can be embedded in HTML pages using special tags and retrieve configuration parameters from <param> tags.
Applets allow Java programs to be run within web browsers. An applet is a Java class that extends Applet and overrides certain methods like init(), start(), stop(), and paint(). These methods control the applet's lifecycle and graphics rendering. Applets are subject to security restrictions like not being able to access the local file system. They can be embedded in HTML pages using special tags and retrieve configuration parameters from <param> tags.
This document discusses Java applets. It defines an applet as a small program that performs a specific task within a larger program. The document outlines the features of applets, providing examples of how to write a basic "Hello World" applet in Java. It also describes the lifecycle of an applet, including the init, start, stop, and destroy methods. The document notes advantages of applets like platform independence, and disadvantages like requiring the Java plugin.
An applet is a Java program that runs in a web browser. It is embedded in an HTML page and runs in the Java Virtual Machine (JVM). To create an applet, a class must extend the Applet class. The applet lifecycle includes initialization, starting, painting, stopping, and destruction. Applets allow Java programs to be run from web pages and have graphical user interfaces.
This document discusses applet programming in Java. It covers key topics like what applets are, how they differ from applications, the applet life cycle including initialization, running, idle, and destroyed states, how to write applets including necessary tags and parameters, and graphics programming using applets. The classes inherited by applets and methods like init(), start(), stop(), destroy(), and paint() are also explained.
This document provides an overview of applet programming in Java. It discusses that applets are small Java programs that are embedded in web pages and can be transported over the Internet. The document then covers the differences between applets and standalone Java applications, the lifecycle of an applet including common methods like init(), start(), stop(), and destroy(), and provides a simple example for creating an applet program by writing the Java code, embedding it in an HTML file, and running it in a web browser or with the appletviewer tool.
An applet is a Java program that runs in a web browser. It can have full Java functionality. Applets have a lifecycle of init(), start(), paint(), stop(), destroy() methods. They are embedded in HTML pages and have security restrictions. The applet displays output using drawString() and requests repaints with repaint(). It can output to the browser status window.
This document provides information about Java applets, including:
1. An applet is a special type of program that is embedded in a webpage to generate dynamic content and runs at the client side inside a browser.
2. Advantages of applets include running at the client side for less response time, being secured, and being able to execute on multiple platforms via browsers. A drawback is requiring a plugin at the client browser.
3. The document then discusses the applet lifecycle, including initialization, running, idle, and destroyed states, and the methods corresponding to each state. It also provides examples of creating a basic "Hello World" applet and displaying graphics within an applet.
This document discusses Java applets, which are small Java applications that run inside web browsers. It describes how applets are embedded in webpages using the <applet> tag and can be passed parameters. The document outlines the applet architecture and lifecycle methods like init(), start(), paint(), stop(), and destroy(). It also discusses how applets can display information in the browser status window.
Applets are small Java programs that run in web browsers. They are classified as local or remote based on where they are stored and executed. The applet lifecycle consists of init(), start(), stop(), and destroy() methods that are automatically called during execution. Applets differ from applications in that they are event-driven, run in a browser, and cannot access local files. The HTML <applet> tag is used to embed applets on web pages and supports attributes like code, width, height, and <param> tags for arguments.
An applet is a small Java program that runs in a web browser. The document discusses the applet lifecycle, which involves initialization, running, idle, and destruction states. It also covers key applet classes like Applet and Graphics, and methods like init(), start(), stop(), paint(), and destroy() that control an applet's execution. The document provides examples of creating a simple "Hello World" applet using Java code, HTML tags, and testing the applet in a browser.
This document provides an introduction to Java applets, including how they differ from standalone applications, how they are built and used on web pages, and some key classes involved in creating applets. The key points are:
1) Applets are small Java programs that can be embedded in HTML pages and run in web browsers, allowing web pages to have interactive elements, while applications are standalone programs run with the Java interpreter.
2) Applets are built using classes like Applet and JApplet and override methods like init() instead of having a main() method. They are usually graphical and enable user interaction.
3) To create an applet, you define a public class that extends JApplet,
This document provides information on Java applets including:
- An applet is a Java program that runs in a web browser context
- It must extend the Applet class or JApplet class
- Includes the applet lifecycle of loading, creating, initializing, starting, stopping, and destroying
- Provides sample code for creating a basic "MyApp" applet class and embedding it in an HTML page
- Discusses restrictions on applets and demonstrates creating an applet project in NetBeans
apidays Singapore 2025 - What exactly are AI Agents by Aki Ranin (Earthshots ...apidays
What exactly are AI Agents?
Aki Ranin, Head of AI at Earthshots Collective | Deep Tech & AI Investor | 2x Founder | Published Author
apidays Singapore 2025
Where APIs Meet AI: Building Tomorrow's Intelligent Ecosystems
April 15 & 16, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
https://apidays.typeform.com/to/ILJeAaV8
Learn more on APIscene, the global media made by the community for the community:
https://www.apiscene.io
Explore the API ecosystem with the API Landscape:
https://apilandscape.apiscene.io/
This document discusses Java applets and their life cycle. It explains that applets are subclasses of Applet that run in web browsers rather than via a main method. The life cycle of an applet involves initialization, start, paint, stop, and destroy methods. It provides an example "Hello World" applet code and explains how to compile, embed in an HTML file, and run it using an applet viewer. Finally, it contrasts applets and applications, noting that applets have limited system access for security while applications are fully trusted and run via a main method.
This document provides an overview of applet programming in Java. It discusses what applets are, how they are executed, their lifecycle methods, and how to pass parameters to applets. It also covers how to request repainting of an applet window, use the status window, and transfer control to other URLs using the AppletContext interface and showDocument method. Key aspects of the APPLET tag for embedding applets in HTML are also explained.
The document discusses Java applets and their core components. It explains that applets are Java programs that run within web browsers. Applets have a lifecycle of initialization, starting, painting, and stopping methods. The document provides details on how to write, compile, and embed a basic "Hello World" applet in an HTML file for testing. It also covers key classes like Graphics, Color, and Font used for applet graphics and UI.
The document discusses applet programming in Java. It defines an applet as a special type of Java program that runs in a web browser. There are two types of applets: local applets that run on the local machine, and remote applets that run on a web server. The document outlines the applet lifecycle and methods, how applets differ from other applications, the steps to develop an applet, and how to run an applet using an HTML file or the applet viewer tool.
An applet is a Java program that runs in a web browser. It extends the Applet class and does not define a main method. Applets are embedded in HTML pages and have a lifecycle of init(), start(), stop(), and destroy() methods. They can use the Graphics class to draw shapes, text, and images. Parameters can be passed to applets from the HTML code.
Applets allow Java programs to be run within web browsers. An applet is a Java class that extends Applet and overrides certain methods like init(), start(), stop(), and paint(). These methods control the applet's lifecycle and graphics rendering. Applets are subject to security restrictions like not being able to access the local file system. They can be embedded in HTML pages using special tags and retrieve configuration parameters from <param> tags.
Applets allow Java programs to be run within web browsers. An applet is a Java class that extends Applet and overrides certain methods like init(), start(), stop(), and paint(). These methods control the applet's lifecycle and graphics rendering. Applets are subject to security restrictions like not being able to access the local file system. They can be embedded in HTML pages using special tags and retrieve configuration parameters from <param> tags.
This document discusses Java applets. It defines an applet as a small program that performs a specific task within a larger program. The document outlines the features of applets, providing examples of how to write a basic "Hello World" applet in Java. It also describes the lifecycle of an applet, including the init, start, stop, and destroy methods. The document notes advantages of applets like platform independence, and disadvantages like requiring the Java plugin.
An applet is a Java program that runs in a web browser. It is embedded in an HTML page and runs in the Java Virtual Machine (JVM). To create an applet, a class must extend the Applet class. The applet lifecycle includes initialization, starting, painting, stopping, and destruction. Applets allow Java programs to be run from web pages and have graphical user interfaces.
This document discusses applet programming in Java. It covers key topics like what applets are, how they differ from applications, the applet life cycle including initialization, running, idle, and destroyed states, how to write applets including necessary tags and parameters, and graphics programming using applets. The classes inherited by applets and methods like init(), start(), stop(), destroy(), and paint() are also explained.
This document provides an overview of applet programming in Java. It discusses that applets are small Java programs that are embedded in web pages and can be transported over the Internet. The document then covers the differences between applets and standalone Java applications, the lifecycle of an applet including common methods like init(), start(), stop(), and destroy(), and provides a simple example for creating an applet program by writing the Java code, embedding it in an HTML file, and running it in a web browser or with the appletviewer tool.
An applet is a Java program that runs in a web browser. It can have full Java functionality. Applets have a lifecycle of init(), start(), paint(), stop(), destroy() methods. They are embedded in HTML pages and have security restrictions. The applet displays output using drawString() and requests repaints with repaint(). It can output to the browser status window.
This document provides information about Java applets, including:
1. An applet is a special type of program that is embedded in a webpage to generate dynamic content and runs at the client side inside a browser.
2. Advantages of applets include running at the client side for less response time, being secured, and being able to execute on multiple platforms via browsers. A drawback is requiring a plugin at the client browser.
3. The document then discusses the applet lifecycle, including initialization, running, idle, and destroyed states, and the methods corresponding to each state. It also provides examples of creating a basic "Hello World" applet and displaying graphics within an applet.
This document discusses Java applets, which are small Java applications that run inside web browsers. It describes how applets are embedded in webpages using the <applet> tag and can be passed parameters. The document outlines the applet architecture and lifecycle methods like init(), start(), paint(), stop(), and destroy(). It also discusses how applets can display information in the browser status window.
Applets are small Java programs that run in web browsers. They are classified as local or remote based on where they are stored and executed. The applet lifecycle consists of init(), start(), stop(), and destroy() methods that are automatically called during execution. Applets differ from applications in that they are event-driven, run in a browser, and cannot access local files. The HTML <applet> tag is used to embed applets on web pages and supports attributes like code, width, height, and <param> tags for arguments.
An applet is a small Java program that runs in a web browser. The document discusses the applet lifecycle, which involves initialization, running, idle, and destruction states. It also covers key applet classes like Applet and Graphics, and methods like init(), start(), stop(), paint(), and destroy() that control an applet's execution. The document provides examples of creating a simple "Hello World" applet using Java code, HTML tags, and testing the applet in a browser.
This document provides an introduction to Java applets, including how they differ from standalone applications, how they are built and used on web pages, and some key classes involved in creating applets. The key points are:
1) Applets are small Java programs that can be embedded in HTML pages and run in web browsers, allowing web pages to have interactive elements, while applications are standalone programs run with the Java interpreter.
2) Applets are built using classes like Applet and JApplet and override methods like init() instead of having a main() method. They are usually graphical and enable user interaction.
3) To create an applet, you define a public class that extends JApplet,
This document provides information on Java applets including:
- An applet is a Java program that runs in a web browser context
- It must extend the Applet class or JApplet class
- Includes the applet lifecycle of loading, creating, initializing, starting, stopping, and destroying
- Provides sample code for creating a basic "MyApp" applet class and embedding it in an HTML page
- Discusses restrictions on applets and demonstrates creating an applet project in NetBeans
apidays Singapore 2025 - What exactly are AI Agents by Aki Ranin (Earthshots ...apidays
What exactly are AI Agents?
Aki Ranin, Head of AI at Earthshots Collective | Deep Tech & AI Investor | 2x Founder | Published Author
apidays Singapore 2025
Where APIs Meet AI: Building Tomorrow's Intelligent Ecosystems
April 15 & 16, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
https://apidays.typeform.com/to/ILJeAaV8
Learn more on APIscene, the global media made by the community for the community:
https://www.apiscene.io
Explore the API ecosystem with the API Landscape:
https://apilandscape.apiscene.io/
apidays New York 2025 - Building Scalable AI Systems by Sai Prasad Veluru (Ap...apidays
Building Scalable AI Systems: Cloud Architecture for Performance
Sai Prasad Veluru, Software Engineer at Apple Inc
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
https://apidays.typeform.com/to/ILJeAaV8
Learn more on APIscene, the global media made by the community for the community:
https://www.apiscene.io
Explore the API ecosystem with the API Landscape:
https://apilandscape.apiscene.io/
METHODS OF DATA COLLECTION (Research methodology)anwesha248
The important methods of data collection along with advantages and disadvantages are published in this power point presentation.
published by- Prateeti Anwesha Bordoloi, Research Scholar
Mahapurusha Srimanta Sankaradeva Vishwavidyalaya
June 2025
Report based on the findings of a quantitative research conducted by the research agency New Image Marketing Group, commissioned by the NGO Detector Media, compiled by PhD in Sociology Marta Naumova.
apidays New York 2025 - Lessons From Two Technical Transformations by Leah Hu...apidays
You Can't Outrun Complexity - But You Can Orchestrate It: Lessons From Two Technical Transformations
Leah Hurwich Adler, Senior Staff Product Manager at Apollo GraphQL
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
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Explore the API ecosystem with the API Landscape:
https://apilandscape.apiscene.io/
apidays New York 2025 - Two tales of API Change Management by Eric Koleda (Coda)apidays
Two tales of API Change Management from my time at Google
Eric Koleda, Developer Advocate at Coda
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
Convene 360 Madison, New York
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
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apidays Singapore 2025 - 4 Identity Essentials for Scaling SaaS in Large Orgs...apidays
4 identity factors you didn't know you needed to support large organizations in your SaaS
Daizen Ikehara, Principal Developer Advocate at Auth0
apidays Singapore 2025
Where APIs Meet AI: Building Tomorrow's Intelligent Ecosystems
April 15 & 16, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
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Explore the API ecosystem with the API Landscape:
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What is FinOps as a Service and why is it Trending?Amnic
The way we build and scale companies today has changed forever because of cloud adoption. However, this flexibility introduces unpredictability, which often results in overspending, inefficiencies, and a lack of cost accountability.
FinOps as a Service is a modern approach to cloud cost management that combines powerful tooling with expert advisory to bring financial visibility, governance, and optimization into the cloud operating model, without slowing down the engineering team. FinOps empowers the engineering team, finance, and leadership/management as they make data-informed decisions about cost, together.
In this presentation, we will break down what FinOps is, why it matters more than ever, and a little about how a managed FinOps service can help organizations:
- Optimize cloud spend - without slowing down dev
- Create visibility into the cost per team, service, or feature
- Set financial guardrails while allowing autonomy in engineering
- Drive cultural alignment between finance, engineering, and product
This will guide and help whether you are a cloud-native startup or a scaling enterprise, and convert cloud cost into a strategic advantage.
apidays New York 2025 - The Challenge is Not the Pattern, But the Best Integr...apidays
The Challenge is Not the Pattern, But the Best Integration
Yisrael Gross, CEO at Ammune.ai
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
Do you want to sponsor or talk at one of our conferences?
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Explore the API ecosystem with the API Landscape:
https://apilandscape.apiscene.io/
apidays New York 2025 - Fast, Repeatable, Secure: Pick 3 with FINOS CCC by Le...apidays
Fast, Repeatable, Secure: Pick 3 with FINOS CCC
Leigh Capili, Kubernetes Contributor at Control Plane
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
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apidays New York 2025 - The FINOS Common Domain Model for Capital Markets by ...apidays
The FINOS Common Domain Model for Capital Markets
Tom Healey, Founder & Director at FINXIS LLC
Daniel Schwartz, Managing Partner at FT Advisory LLC
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
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apidays New York 2025 - The Future of Small Business Lending with Open Bankin...apidays
The Future of Small Business Lending with Open Banking – Bridging the $750 Billion Funding Gap
Charles Groome, Vice President of Growth Strategy at Biz2Credit
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
Check out our conferences at https://www.apidays.global/
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apidays Singapore 2025 - Enhancing Developer Productivity with UX (Government...apidays
Enhancing Developer Productivity with UX
Petrine Tang, UX Designer at Government Technology Agency
Faith Ang, Product Manager at Government Technology Agency
apidays Singapore 2025
Where APIs Meet AI: Building Tomorrow's Intelligent Ecosystems
April 15 & 16, 2025
------
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apidays New York 2025 - Boost API Development Velocity with Practical AI Tool...apidays
Boost API Development Velocity with Practical AI Tooling
Sumit Amar, VP of Engineering at WEX
apidays New York 2025
API Management for Surfing the Next Innovation Waves: GenAI and Open Banking
May 14 & 15, 2025
------
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apidays New York 2025 - Boost API Development Velocity with Practical AI Tool...apidays
Ad
Applets in Java. Learn java program with applets
1. DEPARTMENT OF COMPUTER SCIENCE
& ENGINEERING
Subject Name: Java Programming
Topics Covered: Java Applets
1
Name of the School: School of Computer Science and
Engineering
Course Code: E1UC307C Course Name:Java Programming
Faculty Name: Programe Name:
2. Types of Java Application
2
1. Stand alone application(Java application)
2. Web Application( Applet & JSP/Servlet)
Web applications are the applications users can use through a browser. Standalone
applications are known as Desktop/ Offline applications and can be accessed
offline.
Java applications
Run in stand-alone mode
No additional software required (such as a Web browser)
Java applets
Compiled Java class files
Run within a Web browser (or an appletviewer)
Loaded from anywhere on the Internet
3. Applet
3
An Applet in Java is a small application that runs within a web browser or an
applet viewer. Applets are written in Java and are typically used to provide
interactive features in a web page, such as animations, games, or interactive
forms.
A main() method is not invoked on an applet, and an applet class will not define
main(). Applets are designed to be embedded within an HTML page.
Here is a basic example of how to create an applet in Java:
Steps to Create a Java Applet:
1.Import the necessary packages.
2.Extend the Applet class.
3.Override the init(), start(), stop(), and destroy() methods as needed.
4.Use the paint() method to draw content on the applet window.
5.Create an HTML file to embed the applet in a webpage (for older browsers).
4. Life Cycle Methods of Applet
4
Following are the methods for a full applet cycle.
init() method
start() method
paint() method
stop() method
destroy() method
5. Life Cycle of Applet
5
Applet Life Cycle
Born
Running
Idle
Dead
Begin
init()
start()
paint()
stop()
start()
destroy()
End
In the life-cycle of execution, the
applet exists (lives) in one of these
4 states.
There are methods that can
changes the state of the applet. All
of these methods have a name and
they are called as callback methods.
These methods are named so
because they are called
automatically by the browser when
required for smooth execution of the
applet.
Here, programmers write the
above-mentioned methods with
some code but never calls.
6. Life Cycle steps
6
Four methods in the Applet class give you the framework on which you build any applet:
init: This method is intended for whatever initialization is needed for your applet. It is
called after the param tags inside the applet tag have been processed.
start: This method is automatically called after the browser calls the init method. It is
also called whenever the user returns to the page containing the applet after having
gone off to other pages.
stop: This method is automatically called when the user moves off the page on which
the applet sits. It can, therefore, be called repeatedly in the same applet.
destroy: This method is only called when the browser shuts down normally. Because
applets are meant to live on an HTML page, you should not normally leave resources
behind after a user leaves the page that contains the applet.
paint: Invoked immediately after the start() method, and also any time the applet
needs to repaint itself in the browser. The paint() method is actually inherited from the
java.awt.
7. 7
init()
start()
stop()
destroy()
paint
do other work
init and destroy are only
called once each
start and stop are called
whenever the browser
enters and leaves the page
do some work is code called
by your listeners
paint is called again when
the applet needs to be
repainted
8. Applet Program
8
import java.applet.Applet;
import java.awt.Graphics;
public class HelloWorld extends Applet {
public void paint(Graphics g) {
g.drawString("Hello World!", 50, 25);
}
}
Compile this file HelloWorld.java and mention the path in HTML file
Now you have to create an HTML File that Includes the Applet.
Using a text editor, create a file named Hello.html in the same directory that
contains HelloWorld.class. This HTML file should contain the following text:
9. Embedding Applet in Web page
9
<HTML>
<HEAD>
<TITLE>
Hello World Applet
</TITLE>
</HEAD>
<body>
<h1>Hi, This is My First Java Applet on the Web!</h1>
<APPLET CODE="HelloWorld.class" width=500 height=400></APPLET>
</body>
</HTML>
10. Compile and Run an Applet
10
To compile: javac HelloWorld.java Generates HelloWorld.class
To run:
a) Use the appletviewer from JDK
open command prompt and reach to folder
C:desktop> appletviewer index.html
b) Open page from browser:
index.html
11. Hello World.java
11
import java.applet.Applet;
import java.awt.*;
public class GraphicsDemo extends Applet{
public void paint(Graphics g){
g.setColor(Color.red);
g.drawString("Welcome",50, 50);
g.drawLine(20,30,20,300);
g.drawRect(70,100,30,30);
g.fillRect(170,100,30,30);
g.drawOval(70,200,30,30);
g.setColor(Color.pink);
g.fillOval(170,200,30,30);
g.drawArc(90,150,30,30,30,270);
g.fillArc(270,150,30,30,0,180); }
}
12. Displaying Image in Applet
12
import java.awt.*;
import java.applet.*;
public class DisplayImage extends Applet {
Image picture;
public void init() {
picture = getImage(getDocumentBase(),“abc.jpg");
}
public void paint(Graphics g) {
g.drawImage(picture, 30,30, this);
}
}
13. Passing Parameters to Applet
13
<HTML>
<HEAD><TITLE> Hello World Applet</TITLE></HEAD>
<body>
<h1>Hi, This is My First Communicating Applet on the Web!</h1>
<APPLET
CODE="HelloAppletMsg.class" width=500 height=400>
<PARAM NAME="Greetings" VALUE="Hello Friend, How are you?">
</APPLET>
</body>
</HTML>
14. Applet Program Accepting Parameters
14
//HelloAppletMsg.java
import java.applet.Applet;
import java.awt.*;
public class HelloAppletMsg extends Applet {
String msg;
public void init()
{
msg = getParameter("Greetings");
if( msg == null)
msg = "Hello";
}
public void paint(Graphics g) {
g.drawString (msg,10, 100);
}
} This is name of parameter specified in PARAM tag;
This method returns the value of parameter.
