Detect Loop in linked list

class Node {
    int data;
    Node next;

    Node(int d) {
        data = d;
        next = null;
    }
}

class Solution {
    // Function to check if the linked list has a loop.
    public static boolean detectLoop(Node head) {
        Node slow = head;
        Node fast = head;
        while (fast.next != null && fast.next.next != null) {
            slow = slow.next;
            fast = fast.next.next;
            if (slow == fast)
                return true;
        }
        return false;
    }
}