Return: Quiz III in Java

Quiz: What would this code produce if we were to copy-paste it in a code editor and run it?

String get_greeting(String name) {
	System.out.println("Hey, " + name);
}

void mainFunction() {
	String greeting = get_greeting("Andy");
	System.out.println(greeting);
}

Important Note:

Do not use an actual code editor to get the answer! It would defy the whole purpose of the quiz!