Java applets are little applications (hence the term applets) that can run in your browser to create special effects on your page, like clocks, calculators, and interactive events. There are whole books devoted to Java; here we'll restrict the topic to how to insert applets on your page once you've written or copied them from another source.
To insert an applet:
Figure 18.56. This applet doesn't have any parameters to adjust. Everything is in the opening object tag.
Figure 18.57. Applets let you create interactive, multimedia effects on your page without having to know how to program or script.