TiledGame trying to get it to work

TilesGame.java

package com.mygdx.game;

import com.badlogic.gdx.ApplicationAdapter;
import com.badlogic.gdx.Gdx;
import com.badlogic.gdx.graphics.GL20;
import com.badlogic.gdx.graphics.OrthographicCamera;
import com.badlogic.gdx.graphics.Texture;
import com.badlogic.gdx.graphics.g2d.*;
import com.badlogic.gdx.maps.MapLayers;
import com.badlogic.gdx.maps.tiled.TiledMap;
import com.badlogic.gdx.maps.tiled.TiledMapTileLayer.Cell;
import com.badlogic.gdx.maps.tiled.TiledMapTileLayer;
import com.badlogic.gdx.maps.tiled.renderers.OrthogonalTiledMapRenderer;
import com.badlogic.gdx.maps.tiled.tiles.StaticTiledMapTile;
import com.badlogic.gdx.math.Vector2;
import com.badlogic.gdx.utils.viewport.*;

public class TilesGame extends ApplicationAdapter {
    private OrthographicCamera camera;
    private OrthogonalTiledMapRenderer mapRenderer;
    private BitmapFont font;
    private TiledMap tileMap;
    private Viewport viewport;
    private Hero hero;
    private TextureRegion heroTextureRegion;
    private float delta;
    private float screenWidth, screenHeight;

    static class Hero {
        static float WIDTH, HEIGHT;
        final Vector2 position = new Vector2();
    }

    @Override
    public void create() {
        screenHeight = Gdx.graphics.getHeight();
        screenWidth = Gdx.graphics.getWidth();
        font = new BitmapFont();

        camera = new OrthographicCamera();
        viewport = new ScreenViewport(camera);
        camera.position.set(viewport.getWorldWidth() / 2, viewport.getWorldHeight() / 2, 0);
        viewport.apply();

        createMap();
        createHero();
    }

    private void createMap() {
        tileMap = loadMap();
        mapRenderer = new OrthogonalTiledMapRenderer(tileMap);
    }
    
    private TiledMap loadMap() {
      // omitted for brevity
    }
    
    private void createHero() {
      // omitted for brevity
    }
    
    @Override
    public void render() {
        Gdx.gl.glClearColor(0, 0, 0, 1);
        Gdx.gl.glClear(GL20.GL_COLOR_BUFFER_BIT);

        camera.update();

        delta = Gdx.graphics.getDeltaTime();

        mapRenderer.setView(camera);
        mapRenderer.render();

        renderHero();
       // renderFPS();
        renderCameraCoords();
    }

    private void renderCameraCoords() {
        Batch batch = mapRenderer.getBatch();
        batch.begin();
        font.draw(batch, camera.position.toString(), 0, 0);
        batch.end();
    }

    private void renderFPS() {
        Batch batch = mapRenderer.getBatch();
        batch.begin();
        font.draw(batch, "FPS: " + Gdx.graphics.getFramesPerSecond(), viewport.getScreenX(), 2);
        batch.end();
    }

    private void renderHero() {
        Batch batch = mapRenderer.getBatch();
        batch.begin();
        batch.draw(heroTextureRegion, hero.position.x, hero.position.y);
        batch.end();
    }
    
     @Override
    public void resize(int w, int h) {
        viewport.update(w, h);
    }
}