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Determining Applet Parameters

The accompanying is a case of a HTML document with a CheckerApplet installed in it. The HTML document indicates both parameters to the applet by method for the <param> tag.


<title>Checkerboard Applet</title>


<applet code = "CheckerApplet.class" width = "480" tallness = "320">

<param name = "shading" esteem = "blue">

<param name = "squaresize" esteem = "30">




Note − Parameter names are not case touchy.

Application Conversion to Applets

It is anything but difficult to change over a graphical Java application (that is, an application that uses the AWT and that you can begin with the Java program launcher) into an applet that you can implant in a site page.

Taking after are the particular strides for changing over an application to an applet.

Make a HTML page with the proper tag to stack the applet code.

Supply a subclass of the JApplet class. Make this class open. Something else, the applet can't be stacked.

Take out the fundamental technique in the application. Try not to build a casing window for the application. Your application will be shown inside the program.

Move any instatement code from the edge window constructor to the init strategy for the applet. You don't have to unequivocally build the applet question. The program instantiates it for you and calls the init strategy.

Expel the call to setSize; for applets, measuring is finished with the width and stature parameters in the HTML record.

Expel the call to setDefaultCloseOperation. An applet can't be shut; it ends when the program exits.

On the off chance that the application calls setTitle, take out the call to the technique. Applets can't have title bars. (You can, obviously, title the site page itself, utilizing the HTML title tag.)

Try not to call setVisible(true). The applet is shown naturally.

Occasion Handling

Applets acquire a gathering of occasion taking care of techniques from the Container class. The Container class characterizes a few strategies, for example, processKeyEvent and processMouseEvent, for taking care of specific sorts of occasions, and after that one catch-all strategy called processEvent.

Playing Audio

An applet can play a sound record spoke to by the AudioClip interface in the java.applet bundle. The AudioClip interface has three techniques, including −

open void play() − Plays the sound clasp one time, from the earliest starting point.

open void circle() − Causes the sound clasp to replay ceaselessly.

open void stop() − Stops playing the sound clasp.

To get an AudioClip question, you should summon the getAudioClip() strategy for the Applet class. The getAudioClip() technique returns instantly, regardless of whether the URL makes plans to a genuine sound document. The sound record is not downloaded until an endeavor is made to play the sound clasp.

Showing Images

An applet can show pictures of the arrangement GIF, JPEG, BMP, and others. To show a picture inside the applet, you utilize the drawImage() strategy found in the java.awt.Graphics class.

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