Forwarded from, Java programming thought book a program __ programming

It feels like there's a program that's really interesting.

Package webgate;

Class Egg2 {public
	Egg2 () {
		System.out.println ("New Egg2 ()");
		Y.F ();
	}
	Private yolk y = new yolk ();
	public void insertyolk (yolk yy) {
		y = yy;
	}
	public void G () {
		y.f ();
	}
	Protected class Yolk {public
		yolk () {
			System.out.println ("Egg2.yolk ()");
		}
		public void F () {
			System.out.println ("Egg2.yolk.f ()");
}} public class BigEgg2 extends Egg2 {public
	class yolk extends Egg2.yolk {public
		yolk () {
			System.out.printl N ("Bigegg2.yolk ()");
		}
		public void F () {
			System.out.println ("Bigegg2.yolk.f ()");
		}
	Public BigEgg2 () {
		insertyolk (new Yolk ());
	}
	public static void Main (string[] args) {
		Egg2 e2 = new BigEgg2 ();
		E2.G ();
	}
/// :

What the output of this program is.