Do resource bundles in Java support runtime string substitution?

Question

Can you do the following with a Java ResourceBundle?

In the properties file...

example.dynamicresource=You currently have {0} accounts.

Answer 1

Struts have a nice util called MessageResources which does exactly what you ask for....

e.g.

MessageResources resources = getResources(request, "my_resource_bundle"); // Call your bundle exactly like ResourceBundle.getBundle() method
resources.getMessage("example.dynamicresource",accountCount,param2,...);

Limitation It only allows maximum of 3 parameters (i.e. resource attribute, param1, ..., param3).

I suggest using MessageFormat (if you want to use more than 3 parameter values) as suggested by David Sykes.

PS the getResources method is available only in the Struts Action class.