Java Applet Presented by: Feng Liu. Agenda Introduction Java Applet vs. JavaScript Steps in Creating...
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Transcript of Java Applet Presented by: Feng Liu. Agenda Introduction Java Applet vs. JavaScript Steps in Creating...
Java Applet
Presented by: Feng Liu
AgendaAgenda
• Introduction
• Java Applet vs. JavaScript
• Steps in Creating a Java Applet
• Java Applet Example
• Do I have to write my own
• Summary
IntroductionIntroduction
• What is JAVA?
Java is an object oriented programming language created
by Sun Microsystems
• What is Java Applet? A fully functioning small Java application
Used for Web Design
Need to be embedded into HTML file
IntroductionIntroduction
• What Java Applet Can do? Display message and image on a web page
Draw picture on a web page
receive input from the user through keyboard or mouse
Play Sound
Java Applet vs. JavaScriptJava Applet vs. JavaScript
• Both similar and quite different
Java Applet JavaScript
Created by Sun Created by Netscape
Standalone application
Developed outside out of HTML
text that is fed into a browser that can read it and then is enacted by the browser.
Must be converted into machine language before it can be run on the web
Text based, not need to be compiled
Once it is compiled, it is set. Have to go back to the original text and
alter it, then compile again.
Can be altered after it runs and run it again and again
Steps in Creating a Java AppletSteps in Creating a Java Applet
• Write the Java Applet Source Code import java.applet.Applet; import java.awt.Graphics; public class HelloWorldApplet extends Applet { public void paint(Graphics g) { g.drawString("Hello world!", 50, 25); }
}
• compile it
Steps in Creating a Java AppletSteps in Creating a Java Applet
• Write a HTML to call the Applet <html>
……. <applet CODE=“HelloWorldApplet.class" WIDTH="250"
HEIGHT="22"> </applet> …… </html>
• Open the HTML file in browser and run it
Java Applet ExampleJava Applet Example
Java Applet ExampleJava Applet Example
Do I have to write my ownDo I have to write my own
• No!
• There are many Java Applet available on the Web
• For Example: Java Boutique http://javaboutique.internet.com/
Java File http://www.javafile.com/
Freeware Java http://www.freewarejava.com/applets/index.shtml
etc.
SummarySummary
• Java Applet is part of Java Programming language
• It is a useful tool for the Web Development
• There are thousands of Java Applet available online
• If you decide to use those free applets, make sure you give the author credits
ReferencesReferences
• HTML HOODIES. (2003). So, You Want A Java Applet, Huh!?.http://www.htmlgoodies.com/beyond/applet.html
• HTML HOODIES. (2003). Java vs. JavaScript.http://www.htmlgoodies.com/beyond/j_vs_js.html
• Smith, D. (1998). Java for the world wide web. California: Peachpit Press
• What can a Java Applet do?http://www.vovisoft.com/java/JavaLecture/Week05/12%20What%20can
%20a%20Java%20Applet%20do.html
Thank you
Any Question?