Write a program RandomWalkers.java that takes two integer command-line arguments N and T. In each of T independent experiments, simulate a random walk of N steps and compute the squared distance. Output the mean squared distance (the average of the T squared distances).

public class RandomWalkers {

public static void main(String[ ] args) {

int n = Integer .parseInt(args[0]);

int t = Integer.parseInt(args[1]);

int x = 0;

int y = 0;

int i = x * x + y * y;

while (t > 0)

{

t = t - 1;

while (n > 0)

{

double a = Math.random();

n = n - 1;

if (a <= 0.25) {

x = x + 1;

} else if (a <= 0.5) {

x = x - 1;

} else if (a <= 0.75) {

y = y + 1;

} else if (a <= 1.00) {

y = y - 1;

}

}

i = i + x * x + y * y;

}

int v = Integer.parseInt(args[1]);

System.out.println("mean squared distance = " + i / v);

}

}