The Sample output is also given in the example and in the Java applet, we can have several other comments being installed to produce several other outputs. It means that all the contents are removed from the main memory which is the function of the destroy(). With the paint(), the basic functionality of the applet is drawn and executed. With the help of init() the applet is initialized with all the variables that are required for the applet to run. There are five basic phases for the lifecycle of an applet.

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In order to react to an event, an applet must override the appropriate event-specific method. An applet cannot be closed; it terminates when the browser exits. Remove the call to setSize; for applets, sizing is done with the width and height parameters in the HTML file.

This lesson discusses the basics of Java applets, how to develop applets that interact richly with their environment, and how to deploy applets. We recommend using the latest version of Chrome, Firefox, Safari, or Edge. Applets are written in a language different from the scripting or HTML language that invokes it. The applet is written in a compiled language, whereas the scripting language of the container is an interpreted language, hence the greater performance or functionality of the applet. Unlike a subroutine, a complete web component can be implemented as an applet.

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An applet may be invoked by embedding directives in an HTML file and viewing the file through an applet viewer or Java-enabled browser. Without those import statements, the Java compiler would not recognize the classes Applet United Airlines for Windows and Graphics, which the applet class refers to. The JVM can be either a plug-in of the Web browser or a separate runtime environment. Without the proper plugin, there is no execution of the applet at the client-side. The plugin is required at the client side to execute the applet.

The applet is very easy to build and contains very little redundancy. The applet is combined with HTML, CSS, and Javascript to provide more functionality to the web page. The applet works at the client-side hence there is very low response time. There are several advantages and disadvantages of running a Java applet. Now, we can do many functions on the applet such as Restart, Reload, Stop, Save Start and Clone. These are functionalities that the applet provides with various stages.

• This enables an enterprise to deploy applets that take full advantage of the latest capabilites and features of the Java platform and be assured that they will run reliably and consistently.
• Applets are not full-featured application programs, and are intended to be easily accessible.
• There can be very complex applets that can be made and implemented using BlueJ and other software for HTML and CSS.
• We stress more on the theory part of applets rather than the programming concept for applets.
• In this article, we see the basic functions of an applet, the lifecycle of an applet as well as some basic programs as to how an applet runs in the Java programming language.
• Applets are typical examples of transient and auxiliary applications that don’t monopolize the user’s attention.

Following are the specific steps for converting an application to an applet. It is easy to convert a graphical Java application into an applet that you can embed in a web page. The applet calls parseSquareSize() to parse the squareSize parameter. parseSquareSize() calls the library method Integer.parseInt(), which parses a string and returns an integer. Integer.parseInt() throws an exception whenever its argument is invalid.