Reverse Geocode latitude longitude with Geotools using Natural Earth Shapefiles in Java

I am trying to perform reverse geocoding in Java using GeoTools and Natural Earth Shapefiles. I just want to pass latitude longitude and get the corresponding country name + state name. I have searched entire internet and all the posts on this forum but couldn't find an answer for my specific use case. I am not sure how to pass the latitude longitude value and use Natural Earth shape files to get the country name and state name. I don't want to display anything on the map. Just the country and state name would be enough.