internet applet are small programs that are embedded in the web pages and a run on viewer's machine in a secured manner by Java capable Browsers

An applet is a computer program that can be run inside a web browser. Most of the time, applets are written in Java. They are used to display a scrolling menu on a website, for example, the applet is also used to show some applications. In Java, there is a class called "Applet," which is extended when writing applets.