This week's book giveaways are in the Refactoring and Agile forums. We're giving away four copies each of Re-engineering Legacy Software and Docker in Action and have the authors on-line! See this thread and this one for details.
It calls the constructor of the class EmailAct that takes no arguments. Note that the code above will not compile, because class EmailAct doesn't have a constructor without arguments. I suspect that you copied and pasted part of the code and left something out.