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I’m programming in JSF2 and NetBeans creates many pages with #{} that contains an expression. However sometimes on the web I found ${} for the same thing!
Are there any differences? What are they?
#{}are for deferred expressions (they are resolveddepending on the life cycle of the page) and can be used to read or
write from or to a bean or to make a method call.
${}are expressions for immediate resolution, as soon as they areencountered they are resolved. They are read-only.
You can read more here: http://docs.oracle.com/javaee/6/tutorial/doc/bnahr.html