Answer 1

Java has a Thread class for that you can use
Thread.sleep(10);
to wait 10 milliseconds.
But it could throws a InterruptedException. So you should surround your the sleep method with a try and catch like shown below.
https://www.sololearn.com/learn/Java/2177/?ref=app
https://www.sololearn.com/learn/Java/2185/?ref=app

Answer 2

Java also have a Clock class. Here is an example I wrote.

https://code.sololearn.com/ca3GSqMQb1PO/?ref=app