I need each line of code commented.

Here is my code:

import java.util.Random;

import java.util.Scanner;

public class cardGame {

public static void main(String[] args) {

// TODO Auto-generated method stub

cardG thedeck = new cardG();

Scanner cardReader = new Scanner (System.in);

int inputVal = 0;

while (inputVal!=2) {

System.out.println("1. To play War");

System.out.println("2. Exit Game");

System.out.println("Enter number choice:");

inputVal = cardReader.nextInt();

if (inputVal==1) {

System.out.println("Enter value of the card:");

int cardNum = cardReader.nextInt();

if (cardNum >= 0 && cardNum<=51) {

thedeck.theReturn(cardNum);

}

else {

System.out.println("Incorrect Card!");

}

}

}

System.out.println("System:" + thedeck.systemWon);

System.out.println("You" + thedeck.playerWinner);

}

}

class cardG{

int playerWinner = 0;

int systemWon = 0;

String cards []= {

"Diamonds",

"Spades",

"Hearts",

"Clubs",

};

Random randomNum = new Random();

String inputCard(int card) {

int theSuit = card/13;

int theRanks = card%13;

String cardOutput = "";

switch (theRanks) {

case 0:

cardOutput = "Ace of" + cards [theSuit];

break;

case 10:

cardOutput = "Jack of" + cards [theSuit];

break;

case 12:

cardOutput = "Queen of" + cards [theSuit];

break;

case 11:

cardOutput = "King of" + cards [theSuit];

break;

default:

cardOutput = theRanks + 1 + "of" + cards [theSuit];

break;

}

return cardOutput;

}

void theReturn (int theCard) {

int systemRanks = randomNum.nextInt(52);

System.out.println("Your chosen card:" + "" + theCard + "" + "" + "Your card-" + inputCard(theCard));

System.out.println(" The System chose:" + "" + "" + systemRanks + "" + "Systems Card-" + "" + inputCard(systemRanks));

if (systemRanks > theCard) {

systemWon++;

System.out.println("System has won.");

}

else if (systemRanks == theCard) {

System.out.println(" Round was a tie.");

}

else {

playerWinner++;

System.out.println("You win.");

return;

}

}

}