Jose Esquivel Pi MonteCarlo

CalculatePI2.java

import java.util.*;

public class CalculatePI2
{
        public static boolean isInsider (double xxPos, double yyPos)
    {
            return true;
        }//end isInsider
                public static boolean isInside (double xPos, double yPos)
	{   
		boolean result;
                //
		double distance = Math.sqrt((xPos * xPos) + (yPos * yPos));
                //double distance = Math.sqrt((xPos * xPos) + (yPos * yPos));
		if (distance < 1)
			result = false;
                        System.out.println("distance = " + distance);
			return(distance < 1);//   distance <= 1 ?
	}

	public static double computePI (int numThrows)
	{
		Random randomGen = new Random (System.currentTimeMillis());
		int hits = 0;
		double PI = 0;

		for (int i = 0; i <= numThrows; i++)
		{

			double xPos = (randomGen.nextDouble()) * 2 - 1.0;
			double yPos = (randomGen.nextDouble()) * 2 - 1.0;
			if (isInside(xPos, yPos))
			{
				hits++;
			}
			PI = (4 * (hits/numThrows));
		}
		return PI;
	}

	public static void main (String[] args)
	{
		Scanner reader = new Scanner (System.in);
		System.out.println("This program approximates PI using the Monte Carlo method.");
		System.out.println("It simulates throwing darts at a dartboard.");
		System.out.print("Please enter number of throws: ");
		int numThrows = reader.nextInt();
		double PI = computePI(numThrows);
		double Difference = PI - Math.PI;
		System.out.println ("Number of throws = " + numThrows + ", Computed PI = " + PI + ", Difference = " + Difference );
	}
}