javascript to detect client java version

Question

I am trying to use deployJava to get client java version. But deployJava.getJREs() is returning empty value. I am using windows 7-64bit.
Is there any way to detect client java version?

• Bhargav Modi: FYI
• Siguza: What does this have to do with JavaScript?

Answer 1

firstly you need to verify whether java is enabled on client machine using below code snippet

navigator.javaEnabled()

if it returns true that means java is enabled and now futher you below code snippet

Version of Java:

 /**
 * @return NULL if not version found. Else return some things like: '1.6.0_31'
 */
 var JavaVersion: function()
 {
 var resutl = null;
 // Walk through the full list of mime types.
 for( var i=0,size=navigator.mimeTypes.length; i<size; i++ )
 {
 // The jpi-version is the plug-in version. This is the best
 // version to use.
 if( (resutl = navigator.mimeTypes[i].type.match(/^application\/x-java-applet;jpi-version=(.*)$/)) !== null )
 return resutl[1];
 }
 return null;
 }

or you can use javascript

<script src="http://www.java.com/js/deployJava.js"></script>
<script>
var versions = deployJava.getJREs();
</script>

• WilliamK: The first script throws an error, but the second one returns a version number