Have not used Log4J for ages but is this the common way to do it? To concatenate...

Have not used Log4J for ages but is this the common way to do it? To concatenate parameters into the log messages? In most logging tools where templates with parameters is used you are supposed to pass input as parameters into the templates, not change the templates?. No?

Edit: Found the answer to my own Q. "Do not use String concatenation. Use parameterized message..."