For some reason it wont read the input correctly, my arrays dont contain the right coordinates. Can anyone tell me why?


import java.util.*;
import java.io.*;

public class rope
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int n = in.nextInt();
        int r = in.nextInt();

        double[] x = new double[n];
        double[] y = new double[n];

        double ans = 0.0;
        ans += 2*Math.PI*r;

        for (int i=0; i<n; i++)
        {
            x[i]=in.nextDouble();
            y[i]=in.nextDouble();
        }

        for (int i=0; i<n; i++)
        {
        ans+= Math.sqrt(Math.pow((x[i]-x[i==0 ? n-                1 : i-1]),2)+Math.pow((y[i]-y[i==0 ? n-                1:i-1]),2));
        }

        out.println(ans);
        out.flush();
    }
}

 r is real.

Double r = in.nextDouble();

Code
=================================================================
import java.util.*;
import java.io.*;

public class t1020
{
    public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        PrintWriter out = new PrintWriter(System.out);

        int N = in.nextInt();
        Double R = in.nextDouble();

        Double[] x = new Double[N];
        Double[] y = new Double[N];

        double len = 2 * Math.PI * R;

        for(int i = 0; i < N; i ++)
        {
            x[i] = in.nextDouble();
            y[i] = in.nextDouble();
        }

        for(int i = 0; i < N - 1; i ++)
            len += Math.sqrt(Math.pow((x[i] - x[i == 0 ? N - 1 : i - 1]), 2) + Math.pow((y[i] - y[i == 0 ? N - 1 : i - 1]), 2));

        out.println(len);
        out.flush();
    }
}
================================================================
Write:
================================================================
4 1.0
Exception in thread "main" java.util.InputMismatchException
    at java.util.Scanner.throwFor(Unknown Source)
    at java.util.Scanner.next(Unknown Source)
    at java.util.Scanner.nextDouble(Unknown Source)
    at t1020.main(t1020.java:12)
=================================================================
Why I can not read 1.0?!
4 1 --  Read correctly!!!

in.useLocale(Locale.US);