Write on text area and perform click on web page element

I'm trying to write a text area and submit a button on a Web Page.

I tried using Jsoup but it can also parse the web page.

For example, I want to insert a string on the label (name="q") https://www.google.com/ and submit "Search" button (name="btnK"). I just need the elements names or I need the ids?

Thanks in advance.