1. Java Applet Presented by: Feng Liu

2. Agenda Introduction Java Applet vs. JavaScript Steps in Creating a Java Applet Java Applet Example Do I have to write my own Summary

3. Introduction 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

4. Introduction 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

5. Java Applet vs. JavaScript Both similar and quite different Java AppletJavaScript Created by SunCreated 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

6. Steps 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

8. Steps in Creating a Java Applet Write a HTML to call the Applet ……. …… Open the HTML file in browser and run it

10. Java Applet Example

12. Do I have to write my own No! There are many Java Applet available on the Web For Example: Java Boutique http://javaboutique.internet.com/ http://javaboutique.internet.com/ Java File http://www.javafile.com/ http://www.javafile.com/ Freeware Java http://www.freewarejava.com/applets/index.shtml http://www.freewarejava.com/applets/index.shtml etc.

13. Summary 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

14. References 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%2 0a%20Java%20Applet%20do.html

15. Thank you Any Question?