Forcing static variable initialization at runtime

Is there a way to ensure that a class's static initialization is performed at runtime, and not on the first access of said class?

I am asking because I am currently using a library(of useful tools across multiple projects) but some of them take a reasonable amount of time to initialize. This leads to noticeable lag on the first access of said class, which is not good.

I do understand I can manually initialize it by adding a static method that I call myself at runtime, which does nothing, to force initialize that class, but if there is something I can do to ensure it will be initialized without manually calling an initialization method, that would be much better.

This is what I mean:

Utility Class:

public class Utility {
    public static final Map mapping = new HashMap();
    static {
        //Read file and fill in mappings
    }
}

Main Class:

public class Main {
    public void main(String[] args){
        //
        //Do things for a while
        //

        Object something = 
           Utility.mapping.get("else"); //Lag spike occurs here as the
                                        //static initialization was
                                        //only just now run
    }
}

This is what I currently do to force it, but requires me to call it manually:

Utility Class:

public class Utility {
    public static final Map mapping = new HashMap();
    static {
        //Read file and fill in mappings
    }

    public static void init(){}
}

Main Class:

public class Main {
    public void main(String[] args){
        Utility.init();     //Lag occurs here, where it belongs
        //
        //Do things for a while
        //

        Object something = 
           Utility.mapping.get("else"); //No lag spike now
    }
}