Final

Code

    /// Gian Adoremos
    /// Period: 7
    /// Program Name: Final
    /// File Name: DisplayProbability.java
    /// Date Finished: 11/19/2015
        
    import java.util.Random;
    import java.util.Scanner;
    
    public class DisplayProbability
    {
        public static void main(String[] args) 
        {
            Scanner key = new Scanner(System.in);
            Random r = new Random();
            int d1;
            int numberOfHeads=0,numberOftails=0, flips;//needed for math at end
            
            System.out.println("how many flips?");
            flips = key.nextInt();
            int rflips= flips;
            if (flips < 1 ||flips>2100000000)//easly makes sure the number is in usable bounds
                System.out.println("error please restart");
            else
            {
            while (rflips>0)
            {
                d1 = r.nextInt(2);
                if (d1==1)
                {
                    numberOfHeads++;
                }
                else
                {
                    numberOftails++;
                }
                rflips= rflips-1;
                    
            }
            
            System.out.println("you got "+numberOfHeads+" heads and "+numberOftails+" tails");
            double probOfHeads = (double)numberOfHeads / flips; 
            System.out.println("The probability of heads is " +probOfHeads);
                    
            double probOftails = (double)numberOftails / flips; 
            System.out.println("The probability of tails is " +probOftails);
            }

        }
    }
 

Picture of the output