Having problems trying to resize gridworld grid

I want to resize the grid in gridworld from the default 10x10 to whatever I want. I've been testing it with 15x15 just to see if it works. But I can't seem to figure this out and other sources on the internet say that what I'm doing should work.

The grid stays at 10x10 even though I try and set rowSize & colSize, how can I fix this so that it opens the grid to a 15x15 screen?

This class is where I resize the grid

import info.gridworld.actor.*;
import info.gridworld.grid.BoundedGrid;

public class pokeGrid extends ActorWorld{

    private static final int rowSize = 15;
    private static final int colSize = 15;

    public pokeGrid(){
        super(new BoundedGrid<Actor>(rowSize, colSize));
    }
}

This class is the runner for the actor

public class BeecherBugRunner extends pokeGrid {

    private static pokeGrid world = new pokeGrid();

    public static void main(String[] args)
    {
        ActorWorld world = new ActorWorld();
        BeecherBug beecher = new BeecherBug(4);
        world.add(new Location(7, 8), beecher);
        world.show();
    }
}

private static pokeGrid world = new pokeGrid();

public static void main(String[] args)
{
    ActorWorld world = new ActorWorld();

    ...
}

The problem here is that the world variable of base type ActorWorld declared in main is shadowing your pokeGrid member variable world. The subsequent method calls on world are thus operating on a default world type, not your customized one.

To fix this, remove the ActorWorld world = ... declaration from main. The method calls will then be operating on your customized class.