APPLET PROGRAMING IN JAVA PDF

The first import statement imports the Applet class from applet package. The second statement import the Graphics class from AWT package. The next line in the program declares the class HelloWorld. This class must be declared as public because it will be accessed by code that is outside the program. Inside HelloWorld, paint is declared. This method is defined by the AWT and must be overridden by the applet.

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The first import statement imports the Applet class from applet package. The second statement import the Graphics class from AWT package. The next line in the program declares the class HelloWorld. This class must be declared as public because it will be accessed by code that is outside the program. Inside HelloWorld, paint is declared. This method is defined by the AWT and must be overridden by the applet. Inside paint is a call to drawString , which is a member of the Graphics class. This method outputs a string beginning at the specified X,Y location.

It has the following general form: void drawString String message, int x, int y Here, message is the string to be output beginning at x,y. In a Java window, the upper-left corner is location 0,0. Notice that the applet does not have a main method. Unlike Java programs, applets do not begin execution at main. Instead, an applet begins execution when the name of its class is passed to an applet viewer or to a network browser. However, running HelloWorld with the java command will generate an error because it is not an application.

Using an applet viewer, such as the standard tool, applet-viewer. An applet viewer executes your applet in a window. This is generally the fastest and easiest way to test your applet. Each of these methods is described next. Using java enabled web browser : To execute an applet in a web browser we have to write a short HTML text file that contains a tag that loads the applet.

After you create this html file, you can use it to execute the applet. Refer here Using appletviewer : This is the easiest way to run an applet.

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Overview[ edit ] The Applets are used to provide interactive features to web applications that cannot be provided by HTML alone. They can capture mouse input and also have controls like buttons or check boxes. In response to user actions, an applet can change the provided graphic content. This makes applets well-suited for demonstration, visualization, and teaching.

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