Java Map lookup example

GeoCoordinates.java

package geoCoordinatesMap;

final class GeoCoordinates {
    private final double latitude;
    private final double longitude;

    public GeoCoordinates(double latitude, double longitude) {
        this.latitude = latitude;
        this.longitude = longitude;
    }

    public double getLatitude() {
        return this.latitude;
    }

    public double getLongitude() {
        return this.longitude;
    }
}

GeoLookupDemo.java

package geoCoordinatesMap;

import java.util.Map;
import java.util.HashMap;

class GeoLookupDemo {

    private Map<String, GeoCoordinates> geoMap;

    public void populateDataSet() {
        geoMap = new HashMap<String, GeoCoordinates>();
        geoMap.put("Jeddah", new GeoCoordinates(21.492500, 39.177570));
        geoMap.put("Riyadh", new GeoCoordinates(24.774265, 46.738586));
        geoMap.put("Dammam", new GeoCoordinates(26.399250, 49.984360));
        geoMap.put("makkah", new GeoCoordinates(21.422510, 39.826168));
    }

    public static void main(String[] args) {
        GeoLookupDemo geoDemo = new GeoLookupDemo();
        geoDemo.populateDataSet();
        String cityName = args[0];
        GeoCoordinates geoCoord = geoDemo.geoMap.get(cityName);
        System.out.println(cityName);
        System.out.println(geoCoord.getLatitude() + ", " + geoCoord.getLongitude());
    }
}