Syntax question

I have been working with the asterisk-java library this week and ran across a syntax I didn't recognize. I don't know what it is called so I can't search for info. Here is what I think are the pertinent lines of code

import org.asteriskjava.manager.event.ManagerEvent;
import org.asteriskjava.manager.event.VarSetEvent;

public class TestEvent implements ManagerEventListener {


...
...
...


//ManagerEventListener is abstract so must override onManagerEvent

public void onManagerEvent(ManagerEvent event) {

String eventName = event.getClass().getSimpleName();
if (eventName.equals("VarSetEvent")) {


//this is the syntax I don't recognize
VarSetEvent vse = (VarSetEvent) event;


}
}

It's called casting.

Quote:

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//this is the syntax I don't recognize
VarSetEvent vse = (VarSetEvent) event;

---

That's called casting. The type to cast to is enclosed in () before the variable.

Thank you.