Run up and down test

import java.io.*;

class RunUpAndDown {

    void ruab(double seq[], double n, double critival) {

        double count = 1;                           // total runs

        int i = 0;

        f:

        while (i < n - 1) {

            int j = 0;

            while (seq[i] < seq[i + 1]) {

                i++;

                j++;

                if (i == n - 1) {

                    break f;

                }

            }

            if (j > 0) {

                count++;

            }

            while (seq[i] > seq[i + 1]) {

                i++;

                if (i == n - 1) {

                    break f;

                }

            }

            count++;

        }

        //System.out.println("Count is : " + count);

        double mean = ((2 * n) - 1) / 3.0;                      //formulea for mean

        double varsq = ((16 * n) - 29) / 90;                    //formulea for variance

        double var = Math.sqrt(varsq);                    // square root of variance

        double rup = (count - mean) / var;

        System.out.println(rup);

        if (critival > rup && rup > -critival) {

            System.out.println("Randomness of given numbers accepted");

        } else {

            System.out.println("Randomness of given numbers rejected");

        }

    }

}

/**

 *

 * @author Sanket

 */

public class Main {

    public static void main(String[] args) throws IOException {

        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));

        System.out.println("Enter total number in sequence : ");

        int n = Integer.parseInt(br.readLine());

        double seq[] = new double[n];

        System.out.println("Enter numbers in sequences : ");

        for (int i = 0; i < n; i++) {

            seq[i] = Double.parseDouble(br.readLine());

        }

        double p = (double) n;

        System.out.println("Enter Critical Value : ");

        double cv = Double.parseDouble(br.readLine());

        RunUpAndDown r = new RunUpAndDown();

        r.ruab(seq, p, cv);

    }

}