Finals First Semester (Just keep on flippin...)

Code

/// Name: Amir Salehi
/// Period: 7
/// Program Name:Display Probability
/// File Name:DisplayProbability.java
/// Date Finished: 1/21/2016

import java.util.Random;
import java.util.Scanner;

public class DisplayProbability
{
	public static void main ( String[] args )
	{
		Random r = new Random();
        
        Scanner input = new Scanner(System.in);
        
        int x = 1 + r.nextInt(2), flips;
        int counter = 0;
        double head = 0;
        double tails = 0;
        
        System.out.println(" Welcome to coin flipper!");
        
          System.out.println("How many times would you like to flip? ");
        flips = input.nextInt();
        
        while ( flips < 0 && flips < 2100000000)//I use this while statement to not surpass the bounderies.
        {
             System.out.println(" Sorry, You have chosen an Invalid number.");
            System.out.println("Please choose a number between 1 and 2100000000");
            flips = input.nextInt();
        }
        
        while (flips != counter) //To count how many times it will flip before stopping.
        {
            x = 1 + r.nextInt(2);
            if ( x == 1) {
                System.out.print(" Heads ");
                head++;
            }if (x == 2) {
                System.out.print(" Tails ");
                tails++;
            }
            
            counter++;
        }
        System.out.println("");    
        
        System.out.println("Looks like you had " + head + " amount of Heads and " + tails + " amount of Tails!");

       double probhead = head / flips;
        double probtails = tails / flips;
        
        System.out.println("Probablities of Heads = " + probhead);
        System.out.println("Probablities of Tails = " + probtails);
    }
}
    

Picture(s) of the output