Making Coin Toss for Football game

Hello, I am trying to construct a football simulator game, here is the code that I have so far:

Code :

---

import java.util.Scanner;
import java.util.Random;
 
public class gamePlay{
 
	public static int Downs = 0;
	public static int Yards = 0;
	public static String Coin = null;
	public static String Choice = null;
	public static String Toss = null;
	public static String heads;
	public static String tails;
	public static String Heads;
	public static String Tails;
	public static String Yes;
	public static String No;
public static void main (String[]args){
 
	Scanner keyboard = new Scanner(System.in);
 
	System.out.println("Welcome to todays game, it's time for the coin toss.");
	System.out.println("Please Pick Heads Or Tails By typing you answer.");
	String HT = keyboard.nextLine();
	switch(HT)
	{
	case "Heads":
	case "heads":
		Choice = heads;
		//TODO Make Answer Random
		coinToss();
		break;
	case "Tails":
	case "tails":
		Choice = tails;
		//TODO Make Answer Random
		coinToss();
		break;
		}
		//TODO Test The Above
 
	if(Coin == Heads && (Choice == heads))
	{
		System.out.println("You have won the coin toss!");
		Toss = Yes;
 
	}else if (Coin == Heads && (Choice == tails)){
		System.out.println("You have lost the coin toss...");
		Toss = No;
	}
	if(Coin == Tails && (Choice == tails))
	{	
		System.out.println("You have won the coin toss!");
		Toss = Yes;
	}else if (Coin == Tails && (Choice == heads)){
		System.out.println("You have lost the coin toss...");
		Toss = No;
	}
	if(Toss == Yes)
	{
	//Insert Something here
	}else if(Toss == No)
	{
	//Insert Something here
	}
}
 
public static void coinToss()
{
Random coin = new Random();
int coinRand = coin.nextInt(2);
 
if (coinRand == 0)
{
	System.out.println("The Result was Heads....");
	Coin = Heads;
}else{
System.out.println("The Result was Tails....");
Coin = Tails;
}
 
 
 
	}
 
}

---

My issue is when I run it, it prints "You have won the coin toss!" twice, no matter what the outcome is, could you explain to me what I am doing wrong?

This is a shot in the dark, but I would have used the toss = Math.random(). Then if between 0 and .5 would be equal to heads or tails. Then .6 to 1.0 will be
equal to the other.

I would then have a variable call.

Code :

---

if(call == toss)
{
   System.out.println("you won the toss");
}
 
else
{
   System.out.println("You lost the toss");
}

---

you are printing that out twice because any expression that evaluates to false will print that line, and in both those cases it does.

Ok, how would I make it only have 1 false and 1 true statement? Would it just be a single if-else statement instead?

I would try something like this:

Code :

---

 
public static String CoinToss(String toss)
{
   double call;
   double toss2;
   toss2 = Double.parseDouble(toss);
   String output;
 
  call = Math.random();
 
   if(call == toss)
   {
       output = "You won the coin toss";
    }
 
   else
    {
       output = "You lost the coin toss";
     }
   return output;
}

---

it should be (call == toss2) sorry

Your message prints twice because you have (as you frame it) 4 separate outcomes (choose heads / coin heads, choose heads / coin tails, choose tails / coin heads, choose tails / coin tails), and you have *two* if-else statements like

Code :

---

if (1)
{}
else if (2)
{}
if (3)
{}
else if (4)
{}

---

where you should have

Code :

---

if (1)
else if (2)
else if (3)
else if (4)

---

so that only one condition matches.
That would stop your message appearing twice, but there's another fault in your code: you're assigning

Code :

---

		Choice = heads;

---

but 'heads' is a String reference that has never been assigned - it is null, as is 'tails'