SetAttribute and Timers

//First we should have the method to create the timer
public static Timer createMyTimer(){
    Timer timer = new Timer(blablabla);


    return timer;
}


//Then give it to each player as an attribute when they log in
@EventMethod
public void onSpawn(PlayerSpawnEvent event){
    Player player = event.getPlayer();
    player.setAttribute("timerAttribute", createMyTimer())
}


//Then for example for starting or stopping the timer. Ofc this can be done in any other way you want
public static void startPersonalTimer(Player player){
    Timer timer = (Timer) player.getAttribute(timerAttribute);
    timer.start();
}


public static void stopPersonalTimer(Player player){
    Timer timer = (Timer) player.getAttribute(timerAttribute);
    timer.pause();
}


//Note that I have set all the methods except the EventMethod as static, this way you can call them for different classes in the same package without instancing the other class first.