Change the value of a variable after N milliseconds in Java

Question

I'm making a game in Java using Netbeans() and I want a Boolean variable takes the value of true when it is taken an item "X", the item "X" represents a character's ability which lasts "N" miliSeconds, what is the best way to do that after "N" miliSeconds the variable returns the value from false?

Answer 1

Now, not sure if it is my place to say, but I have a recommendation and an answer.

I would recommend building a skills/ability library. Use that to track cool downs, casting times etc. It would be more efficient overall.

As for the answer, check to see if the current time minus the time the ability was started is over 1000, then set the variable. Have this be used in a looped system such as a thread.