Identifying duplicate elements in an array

The function should determine whether there is at least one element in the given array that occurs more than once.

Example: Input: [1, 2, 3, 4, 5] → false Input: [1, 2, 3, 1, 5] → true

class Main {
    public static void main(String[] args) {
        int[] arr;
        boolean hasDup = containsDuplicate(arr);
    }

    public static boolean containsDuplicate(int[] numbers) {
        return false;
    }
}