Can someone walk me through how this program was created?

import java.io.*;

import java.util.*;

public class Prog329f

{

public static void main(String[] args)

{

do

{

System.out.print("Choices of hair style follow:\n1) Parted\n2) Brush Cut\n3) Balding\n4) Mohawk\nEnter Choice: ");

Scanner keyboard = new Scanner(System.in);

int hair = keyboard.nextInt();

System.out.print("\nChoices of eye style follow:\n1) Beady Eyed\n2) Wide Eyed\n3) Wears Glasses\n4) Sleepy Eyes\nEnter Choice: ");

int eyes = keyboard.nextInt();

System.out.print("\nChoices of mouth style follow:\n1) Smiling\n2) Straight Faced\n3) Surprised\n4) Dimples\nEnter Choice: ");

int mouth = keyboard.nextInt();

drawHair(hair);

for (int i = 1; i<=2;i++)

{

faceEdge();

}

drawEyes(eyes);

drawEars();

drawMouth(mouth);

faceEdge();

System.out.println();

}while (nextFace());

}

/* Asks the user if he/she wants to continue

* Pre: User has reached the end of one complete face.

* Post: Method either stops the whole program (if 0 is entered), or loops the questions again in order to make a new face.

*/

public static boolean nextFace()

{

System.out.print("Press any key to continue..[0 to quit] ");

Scanner keyboard = new Scanner(System.in);

String nextFace = keyboard.next();

if (nextFace.equals("0"))

return false;

else

return true;

}

/* Draws the hair of the face/character.

* Pre: User enters hair number choice from 1-4.

* Post: Prints out the hair style chosen by the user.

*/

public static void drawHair(int numEntered)

{

if (numEntered ==1)

System.out.println(" | | | | | / / / / /");

else if (numEntered ==2)

System.out.println(" | | | | | | | | | |");

else if (numEntered ==3)

System.out.println(" |_________________|");

else if (numEntered ==4)

System.out.println(" |______|||||______|");

}

/* Draws the eyes of the face/character.

* Pre: User enters eye number choice from 1-4.

* Post: Prints out the eye style chosen by the user.

*/

public static void drawEyes(int numEntered)

{

if (numEntered ==1)

System.out.println(" | . . |");

else if (numEntered==2)

System.out.println(" | O O |");

else if (numEntered==3)

{

System.out.println(" | ___ ___ |\n |---|_O_|-|_O_|---|");

}

else if (numEntered==4)

System.out.println(" | __ __ |");

}

/* Method draws ears for the character.

* Pre: User has chosen the character's hair and eyes.

* Post: Prints out ears for the character.

*/

public static void drawEars()

{

System.out.println(" _| |_\n|_ _|");

}

/* Draws the mouth of the face/character.

* Pre: User enters mouth number choice from 1-4.

* Post: Prints out the mouth style chosen by the user.

*/

public static void drawMouth(int numEntered)

{

if (numEntered ==1)

System.out.println(" | |_______| |");

else if (numEntered ==2)

System.out.println(" | _______ |");

else if (numEntered ==3)

System.out.println(" | o |");

else if (numEntered==4)

System.out.println(" | )_______( |");

}

/* Prints out edge of head when there is no hair,eyes, or mouth section to draw it.

* Pre: Runs after hair and mouth are drawn.

* Post: Prints out outline for sides/edges of head.

*/

public static void faceEdge()//draw edge of face

{

System.out.print(" |");

for (int n = 1; n<18;n++)

System.out.print(" ");

System.out.print("|\n");

}

}