Print BEL character in applet

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Campos - 05 May 2004 19:25 GMT

Hi all,

Is there any way to display the BEL character (ASCII code 7) in an
applet embeded in a HTML page.
I've made some tests with GraphicsEnvironment:
1 - I called the getFontsList() from GE.
2 - For each Font returned i've called the method canDisplayChar(
(char) 7 )
3 - That method returned true only for Batanga font.
4 - I've tried to set the Batanga font in a JTextArea and set the text
of that TextArea to include the char code 7.

But, no beep is produced by the speaker of the computer. I've also
tested with getToolkit.beep() but what i really want is to produce the
beep from BEL character, as the HTML page with the applet is to be
used in a thin client environment acessing a remote Windows 2003
Server (using RDP) and the thin clients don't even have a speaker,
only a beeper.

If someone could help, it would be appreciated.

Best regards,
Campos

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Chris Smith - 05 May 2004 19:45 GMT

> Is there any way to display the BEL character (ASCII code 7) in an
> applet embeded in a HTML page.

You can certainly display it, but you're unlikely to find a font that
maps a glyph to it. You're likely to get one of those little square
boxes indicating the lack of an appropriate glyph in the font.

> But, no beep is produced by the speaker of the computer. I've also
> tested with getToolkit.beep() but what i really want is to produce the
> beep from BEL character, as the HTML page with the applet is to be
> used in a thin client environment acessing a remote Windows 2003
> Server (using RDP) and the thin clients don't even have a speaker,
> only a beeper.

So it appears you don't want to display it, but rather want to cause a
beep; and you're furthermore convinced that you want to use an ASCII
code 7 to do so.

That's too bad, because you can't accomplish that latter goal. The beep
behavior attached to the BEL ASCII code is a feature of certain command
prompts and terminals. It goes without saying that unless you are
speaking to a command prompt or terminal that implements this feature,
the feature won't work.

I'd expect that on a PC-architecture system with no external sound
interface, the default toolkit's beep would use the internal speaker (if
it's present). If not, then you'll have to resort to something more
system-specific (such as JNI) to cause the beep.

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Roedy Green - 05 May 2004 20:57 GMT

>> But, no beep is produced by the speaker of the computer. I've also
>> tested with getToolkit.beep() but what i really want is to produce the
>> beep from BEL character, as the HTML page with the applet is to be
>> used in a thin client environment acessing a remote Windows 2003
>> Server (using RDP) and the thin clients don't even have a speaker,
>> only a beeper.

see http://mindprod.com/products.html#SPEAKER
requires JNI and applet signing though.

--
Canadian Mind Products, Roedy Green.
Coaching, problem solving, economical contract programming.
See http://mindprod.com/jgloss/jgloss.html for The Java Glossary.

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Print BEL character in applet

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