What use java in html works??

Answer 1

javascript is different than Java with no connection js is used to add interactivity to the webpage. there is java in webpage as applet in html but they are not normally used today

Answer 2

There is no Java in html.
And there is JavaScript which helps us to realize all page interactivity.

Answer 3

There is also JSF(Java Server Faces) which is a java framework you can use to write html with custom tags and an expression language backed by java beans.