What java-related technologies do you need to learn to get the browser to do something on a site?

Question

Java

I want the browser to insert some text on the site itself, then click it. And the information received was entered somewhere. And I want this process to be repeated without my participation.

Answer 1

Selenium
What is Selenium?
Selenium automates browsers. That's it! What do you do with that power is entirely up to you. Primarily, it is for automating web applications for testing purposes, but is certainly not limited to just that. Boring web-based administration tasks can (and should!) be automated as well.
Selenium has the support of some of the largest browser vendors who have taken (or are taking) steps to make Selenium a native part of their browser. It is also the core technology in countless other browser automation tools, APIs and frameworks.