Unfortunately, the provided search results do not contain any information about downloading a Java client for v2 API or a recipe vector product.

However, I found that there is an HTTP/REST based Vector DB client available on npm called @upstash/vector. It's built on top of Upstash REST API and might be related to your query.

If you're looking for a Java client for v2 API, I couldn't find any information about it in the search results. You may want to try searching again or providing more context about the v2 API you're referring to.

As for the recipe vector product, I couldn't find any relevant information in the search results. It's possible that it's a specific product or service not related to Java or v2 API.

If you have any more questions or clarification regarding your query, feel free to ask!