Shuffle

Considering , i have not been posting a lot , does it make me busy perhpas not but my lethargy wins over me again .

Good link for shuffle
1. http://www.cs.princeton.edu/introcs/25array/

public class Shuffle {
   public static void main(String[] args) {
       int N = Integer.parseInt(args[0]);
       String[] a = new String[N];

       // read in data
       for (int i = 0; i < N; i++) {
           a[i] = StdIn.readString();
       }

       // shuffle
       for (int i = 0; i < N; i++) {
           int r = (int) (Math.random() * (i+1));     // int between 0 and i
           String swap = a[r];
           a[r] = a[i];
           a[i] = swap;
       }

       // print permutation
       for (int i = 0; i < N; i++)
           System.out.println(a[i]);

   }
}