This is an example for StackOverflow to help someone resolve a GSON issue.

gistfile1.java

import java.lang.reflect.Type;
import java.util.List;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class MapData {
  private int id;
	private String city;
	private String street;
	private String state;
	private int zipcode;
	private double lat;
	private double lng;

	public MapData(int id, String city, String street, String state,
			int zipcode, double lat, double lng) {
		this.id = id;
		this.city = city;
		this.street = street;
		this.state = state;
		this.zipcode = zipcode;
		this.lat = lat;
		this.lng = lng;
	}

	public int getId() {
		return id;
	}

	public void setId(int id) {
		this.id = id;
	}

	public String getCity() {
		return city;
	}

	public void setCity(String city) {
		this.city = city;
	}

	public String getStreet() {
		return street;
	}

	public void setStreet(String street) {
		this.street = street;
	}

	public String getState() {
		return state;
	}

	public void setState(String state) {
		this.state = state;
	}

	public int getZipcode() {
		return zipcode;
	}

	public void setZipcode(int zipcode) {
		this.zipcode = zipcode;
	}

	public double getLat() {
		return lat;
	}

	public void setLat(double lat) {
		this.lat = lat;
	}

	public double getLng() {
		return lng;
	}

	public void setLng(double lng) {
		this.lng = lng;
	}

	public static void main(String[] args) {
		List<MapData> data = getData();
		System.out.println(data.get(0).city);
	}
	
	public static List<MapData> getData(){
		Gson gson = new Gson();
		String jsonString = "[{\"id\":18,\"city\":\"test\",\"street\":\"test 1\",\"zipcode\":121209,\"state\":\"IL\",\"lat\":32.158138,\"lng\":34.807838},{\"id\":19,\"city\":\"test\",\"street\":\"1\",\"zipcode\":76812,\"state\":\"IL\",\"lat\":32.161041,\"lng\":34.810410}]";
		Type type = new TypeToken<List<MapData>>(){}.getType();
		return gson.fromJson(jsonString, type); 	
	}
}