I can't find the terminal where the message is supposed to show. How is it called? I'm guessing it should be in View->Tool Windows but nothing from there seems to work. It's a Maven project and all I can see is GlassFish log.
System.out and System.err output is written to either the Run or the Debug tool window depending on whether you launch the run/debug configuration as Run or Debug. See https://www.jetbrains.com/idea/help/running-and-debugging.html and https://www.jetbrains.com/idea/help/run-tool-window.html for more information (Same information is in the Help guide of the IntelliJ IDEA Ultimate version).