What is the diffrence between java and js

Question

beside the html which of them is needed?

Answer 1

an easy way

java is for android

js is for web its used for the logics in html.

Answer 2

Java is a platform-independent, object-oriented programming language developed by James Gosling of Sun Microsystems in 1984 & first publicly released in 1995.
https://en.m.wikipedia.org/wiki/Java_(software_platform)
JavaScript is a scripting language developed by Brendan Eich of Netscape in 1995.

https://en.m.wikipedia.org/wiki/JavaScript

They are, by far, different.