What is the difference between Java, JavaScript, and jQuery?

Question

are they related? is there an order to learning them? and are they relevant when simpler to write languages like ruby exists?

Answer 1

jQuery is written in JavaScript. java is not related to them.

Answer 2

Java and JavaScript are independent programming languages. jQuery is just a library written in JavaScript.

Answer 3

Java is a general programming language. Javascript is a web scripting language (in lay man terms: programming language) while jQuery is a library written in Javascript