Program to Shuffle a pack of card in O(n)

public class Shuffle {

public static void shuff(int[] arr) {
for(int i=0; i
int rand  = (int)(Math.random() * arr.length);
int temp = arr[rand];
arr[rand] = arr[i];
arr[i] = temp;
}
for(int i=0; i
System.out.println(" "+arr[i]);
}
}
}