Getting Java System Properties in ColdFusion

October 29, 2004 by Pete Freitag

A while back I wrote some CFML code to dump the Java System Properties, the code went something like this:

<cfset system = CreateObject("java", "java.lang.System")>
<!--- properties is a java.util.Properties object --->
<cfset properties = system.getProperties()>

 <!--- propNames is a java.util.Enumeration --->
<cfset propNames = properties.propertyNames()>


<cfoutput>
 <cfloop condition="propNames.hasMoreElements()">
	<cfset propName = propNames.nextElement()>
	<strong>#propName#</strong> = #system.getProperty(propName)#<br /> 
 </cfloop>
</cfoutput>

That works (the code didn't work in until CFMX 6.1, see this post), but I realized today as I wanted to display the results in a table much like the way CFDUMP works - that a java.util.Properties object is a java.util.Dictionary, and a ColdFusion structure is a Dictionary so I can probably CFDUMP a Properties object. And you can infact CFDUMP a Properties object or any Hashtable, and it will output the values in a table just like a structure. So now I can dump the java system properties in a table with only two lines of code:

<cfset system = CreateObject("java", "java.lang.System")>
<cfdump var="#system.getProperties()#">