New to Java

I'm brand new to java and I'm seriously in need of some help. I'm on loops and while people have told me they are easy, I'm still a bit confused. This program has thrown me into programming something that flips a coin randomly getting heads or tails, based on user input.

How do I do this? Well, I can get the user input part in fine and get the program to run based on the number put in, it's just I can't get it to flip the coin. Help me out, if you please.