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Basic structure of an applet

Well, this is very simple and the basic structure of an applet will be the same for every applet you will program. The major difference between an applet and an application is that there is no public static void main (String[]args) - method in an applet! Instead every applet should implement the following methods:

// Now you should implement the following methods

// init - method is called the first time you enter the HTML site with the applet
public void init() {... }

// start - method is called every time you enter the HTML - site with the applet
public void start() {... }

// stop - method is called if you leave the site with the applet
public void stop() {... }

// destroy method is called if you leave the page finally (e. g. closing browser)
public void destroy {... }

/** paint - method allows you to paint into your applet. This method is called e.g. if you move your browser window or if you call repaint() */
public void paint (Graphics g) { }

To insert an applet to a HTML - site you have to add the following lines to your HTML document.

1. applet code ="FirstApplet.class" tells the browser where to find the "extends Applet" - class.
2. width and height tell the browser how big the applet should be

Next chapter

How to Add Java Applets to Your Site

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