Jsoup: get all heading tags

Use doc.select("h1,h2,h3,h4,h5,h6") to get all heading tags. Use doc.select("h1") to get each of those tags separately. See the various things you can do with a select statement in http://preciselyconcise.com/apis_and_installations/jsoup/j_selector.php

Your selector means h-Tag with attribute "0-6" here - not a regex. But you can combine multiple selectors instead: hh = doc.select("h0, h1, h2, h3, h4, h5, h6");.

Grouping: do you need a group with all h-Tags + a group for each h1, h2, ... tag or only a group for each h1, h2, ... tag?

Here's an example how you can do this:

// Group of all h-Tags
Elements hTags = doc.select("h1, h2, h3, h4, h5, h6");

// Group of all h1-Tags
Elements h1Tags = hTags.select("h1");
// Group of all h2-Tags
Elements h2Tags = hTags.select("h2");
// ... etc.

If you want a group for each h1, h2, ... tag you can drop first selector and replace hTags with doc in the others.