difference between java, java EE, servlet, JDK

Java is programming language but what is the difference between java, java EE, servlet, JDK?

I know Java EE is built on top of Java SE but what is it actually a platform, framework or what? Servlet technology is used to create web application but is it a platform, programming language, framework or what?

Java language is used in android app development but where do we use Java ME?

Thanks