public static void main(String args[]) {
        SerializeDeserializeBinaryTree sd = new SerializeDeserializeBinaryTree();
        Node node = sd.deserialize("10,$,30,15,$,%,20,$,21,16,$,%,18");
        TreeTraversals tt = new TreeTraversals();
        tt.inOrder(node);
        String serializedTree= sd.serializeLevelOrder(node);
        Node root = sd.deserializeLevelOrder("1,2");
        tt.inOrder(root);
    }
Deserialize Tree using level order traversal.
src/com/interview/tree/SerializeDeserializeBinaryTree.java