java generic array and Classcast exception

I had declared BinaryTree as below :

public class BinaryTree<T extends Comparable<T>> {}

But when I call

Character[] actual = binaryTreeChar.preOrderTraversal(root, Character[].class); 

it is throwing exception as below.

java.lang.ClassCastException: [[Ljava.lang.Character; cannot be cast to [Ljava.lang.Comparable;

Is there any better way to deal these cases ?

public T[] preOrderTraversal(BinaryNode<T> root, Class<T[]> clazz) {
        if (root == null)
            return null;
        T[] array = (T[]) Array.newInstance(clazz, count);
        Stack<BinaryNode<T>> stack = new Stack<>();
        stack.push(root);
        int i = 0;
        while (!stack.empty()) {
            BinaryNode<T> next = stack.pop();
            array[i++] = next.data;
            if (next.right != null)
                stack.push(next.right);
            if (next.left != null)
                stack.push(next.left);
        }
        return array;
    }


}