Test Java Detection

Detecting Java from JavaScript

You can detect whether Java is installed using a couple techniques. But different browsers have different behavior. Also there are many reports on the web of these techniques being buggy. This page can be run with different browsers to see how they behave.

We will now test both techniques on your browser:

1) navigator.javaEnabled() returns

2) Scan the list of plugins. This seems to work on Firefox and Safari but not on IE6.

function IsJavaPluginInstalled() { java_installed = false; if (navigator.plugins && navigator.plugins.length) { for (x = 0; x <navigator.plugins.length; x++) { plugin_name = navigator.plugins[x].name; //document.write( "plugin_name = " + plugin_name + "<br> "); if (plugin_name.indexOf('Java(TM)') != -1) { java_installed = true; break; } else if (plugin_name.indexOf('Java ') != -1) { java_installed = true; break; } } } return java_installed; }

IsJavaPluginInstalled() returns

Results of Tests Made with Various Browsers

	navigator.javaEnabled()	plugin scan
IE6 on Windows XP with Java 1.6.0_03	true	false
IE6 on Windows XP with Microsoft Java	true	false
FireFox on Windows XP with Java 1.6.0_03	true	true
Safari on Mac OS X with Java	true	true
FireFox on Mac OS X with Java	true	true

Your browser's navigator.userAgent is

Your browser's list of navigator.plugins:

ListenUp Test LiveConnect

Detecting Java from JavaScript

Results of Tests Made with Various Browsers