A Simple Guide To HTML - Java Applets

Java Applets

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Java Applets are basically program applications designed to run in web browsers. Supposedly platform independant, applets are a versatile way of running programs on web pages. As with JavaScripts, there are also many java applets out there, from chat programs to login and password applets. Note: login and password applets are not a safe way of password protecting your site and are not advisable. (I dont see why any individual would want to).

<APPLET></APPLET> - The Applet Tag. With Java applets, the applet itself is a separate file, a .class file and is basically "embedded" into your page. Many applets can have parameters other than the basic width, height etc., these are so users can, for example, customise the background colour, text colour/size etc. of the applet.
<APPLET .. CODE="url "> - Applet Code. The code parameter is the name (and location if necessary) of the .class file. If your applet contains more than one .class file then it should seem obvious to use the one which has the public static void main in it.
<APPLET .. WIDTH="??" HEIGHT="??"> - Applet Size. You may recall that with images you may omit the width and height parameters, however this is not so with applets. In some cases you may be able to leave them out but as a general rule the applet size has to be defined.
<APPLET .. NAME="text "> - Applet Name. Hmm, let me think, that must be the name of the applet!!!
<APPLET .. ALT="text "> - Alternate Text. Some people choose not to view applets, and it is for this reason you should include a text message or title.

See my Logo Turtle Graphics Applet as an example of including Java applets on your website. View the page source to see how the <APPLET> </APPLET> tag is used to simply load the .jar file.

Here is an example of an applet that can take parameters. Click here to see it.

<HTML>
<HEAD>
<TITLE>This is the Title</TITLE>
</HEAD>
<BODY>
<APPLET code="ParamTest.class" height="50" width="250">
<PARAM NAME="font" VALUE="Dialog">
<PARAM NAME="size" VALUE="16">
<PARAM NAME="string" VALUE="Applet Example Text">
</APPLET>
</BODY>
</HTML>

A Good Source for Java Applets: http://javaboutique.internet.com/

!! Under Construction !!

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