Q: How to detect which JAVA VM is installed?

[Jan Vinten]

Hello,

I'm looking for a javascript, that can detect which java VM is installed and
what the current version is.

Can any of you give me some details?

Best regards,
Jan
Denmark

[Martin Honnen]

Re: Q: How to detect which JAVA VM is installed?



Jan Vinten wrote:
[color=blue]
> I'm looking for a javascript, that can detect which java VM is installed and
> what the current version is.[/color]

Using Liveconnect calls from JavaScript to Java you can read out Java
properties with Netscape 4, Netscape 7 and I think with Opera 7:

if (navigator.java Enabled() && typeof java != 'undefined') {
alert(
'java.version: ' + java.lang.Syste m.getProperty(' java.version')
+ '\n'
+ 'java.vendor: ' + java.lang.Syste m.getProperty(' java.vendor'))
}

But that will start up the Java VM.

You could also look into navigator.plugi ns:

var pluginName = 'Java Plug-in';
for (var i = 0; i < navigator.plugi ns.length; i++) {
var plugin = navigator.plugi ns[i];
if (plugin.name == pluginName) {
alert(plugin.de scription);
break;
}
}

That shouldn't start up the Java VM but is obviously restricted to
browsers that use a plugin such as that from Sun to run Java applets and
that support the navigator.plugi ns array.



--

Martin Honnen

http://JavaScript.FAQTs.com/