Final Exam

Code

    /// Name: Xinting Chen
    /// Period: 7
    /// Program Name: Final Exam
    /// File Name: FinalExam.java
    /// Date Finished: 1/21/2016
  
import java.util.Scanner;
import java.util.Random;
import java.util.InputMismatchException;

public class FinalExam
{
	public static void main( String[] args )
	{
		
        Random r = new Random();
        
        int heads = 0;
        int tails = 0;
        int flips = getFlips();
      
        
        for (int i = 0; i< flips; i++)
		{
			if (r.nextInt(2)==0)
                tails++;
            else
                heads++;
        }
        double probHeads = ((double)heads / flips *100);
        double probTails = ((double)tails / flips *100);
        System.out.println( "The number of heads is ... " + heads);
        System.out.println( "The number of tails is ... " + tails);
        System.out.println( "The probablity of rolling heads is... " + probHeads + "%");
        System.out.println( "The probablity of rolling tails is... " + probTails + "%");      
    }
    static int getFlips()
    {   
            Scanner keyboard = new Scanner(System.in);
            boolean exception = false;
            int flips = 0;
            while (flips <= 0 || flips >= 2100000000)
            {
                keyboard = new Scanner(System.in);
                exception= false;
                try
                {
                    System.out.println( "How many times do you want to flip the coin? " );
                    flips = keyboard.nextInt();
                }
                catch (InputMismatchException e)
                {
                    System.out.println( "Try another number please.");
                    flips = 0;
                    exception = true;
                }
                if (( flips <=0 || flips >= 2100000000) && !exception)
                    System.out.println( "Try another number that's greater than 0 and less than 2100000000.");
            }
        return flips;
      
    }
  }
        
        


    

Picture of the output