Assignment #70 and Flip Again?

Code

///John Mulligan
///period 5
///Program Name: FlipAgain
///File Name: FlipAgain.java


import java.util.Random;
import java.util.Scanner;

      public class FlipAgain
      {
      	public static void main( String[] args )
      	{
	      	Scanner keyboard = new Scanner(System.in);
	      	Random rng = new Random();

              System.out.println("Would you like to flip a coin (y/n) ?");
	      	String again = keyboard.next();

	        	do
	    	{
		      	int flip = rng.nextInt(2);
		      	String coin;
    
		    	if ( flip == 1 )
		      		coin = "HEADS";
		      	else
		      		coin = "TAILS";

		      	System.out.println( "You flip a coin and it is... " + coin );

		      	System.out.print( "Would you like to flip again (y/n)? " );
		      	again = keyboard.next();
	          	} while ( again.equals("y") );
	      }
}