[Libgdx] Actions after a certain time elapsed

How to do the following with the least code possible?

-> After holding a certain key down for one second, do stuff

Now of course you can create a variable, increment that variable by delta time, and if that variable > 1, then do stuff, like

int ticks = 0;

public void foo(float delta) {
        ticks += delta;
        if(ticks > 1) doStuff();

But I find that code clunky and adds variables to the class that I don’t really like.

Is there a more elegant way of doing it? (And btw I’m using kotlin language so don’t be afraid to post the possibilities in that language)