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JApplet” refers to a class in the Java programming language that allows for the creation of applets, which are Java programs that can be embedded into web pages and other applications. The JApplet class is part of the Java Foundation Classes (JFC) within the Java Swing package, which provides a rich set of graphical user interface (GUI) components.

A JApplet runs within a web browser’s sandbox security model, which protects the user by restricting the applet’s capabilities (for instance, an applet generally cannot access the local file system), making it a safe way to enhance web pages with dynamic content.

The JApplet class is often used as the basis for complex graphical applications that are delivered via the internet. This includes games, animations, calculators, and many other types of interactive tools. However, it’s worth noting that the usage of Java applets has significantly declined due to the rise of more modern web technologies like HTML5, CSS3, and JavaScript.

To create an applet, one must extend the JApplet class and override at least one of its methods to create a GUI. After being compiled, the applet can be embedded into an HTML page using the <applet> tag (although this is now deprecated) or the <object> tag.

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