JQuery Autocomplete — how to make drop down list, the first was the line that begins with the entered sequence?

JQuery Autocomplete - how to make drop down list, the first was the line that begins with the entered sequence?

For example, if you go to their website:
https://jqueryui.com/autocomplete/
and enter in the field "Tags" the letter j.
The winning list:
Clojure
Java
Javascript

But I entered j. Why the first falls Clojure? How to make Java? She's on J starts.