Drunken Sailors

import java.util.*;
public class Sailors{
  static int N=10000; //number of sailors
  static double [] sls = new double[N];//actual sailor coordinates
  static double step = 1.;//step size
  static Random rnd = new Random();
  static int currenttime=0;

  static void makestep(){
    for(int i=0;i<N;i++){
    if(rnd.nextDouble()<0.5)
            sls[i]+=step;
        else
            sls[i]-=step;
    }
  }
  static void statistics(){
    double sum=0; //sum of coordinates
    double sum2=0;//sum of coordinate squares
    for(int i=0;i<N;i++){
    sum+=sls[i];
        sum2+=sls[i]*sls[i];
    }
    double mean = sum/N;
    double meansquare = sum2/N;
    System.out.println("Time   "+currenttime+"  Mean    "+mean+"   meansquare   "+meansquare+"  rooted meansquare   "+Math.sqrt(meansquare));
  }
  public static void main(String[] args){
    for(int i=1;i<100;i++){
      currenttime=i;
      makestep();
      statistics();
    }
  }
}