Convert Java array list to JSON

import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.gson.JsonArray;
//..................
public static String convertArrayListToJson(
List<Map<String, String>> listToConvert) {
String returnString = "";
try {
Gson gson = new GsonBuilder().create();
JsonArray myJsonArray = gson.toJsonTree(listToConvert)
.getAsJsonArray();
returnString = myJsonArray.toString();
} catch (Exception e) {
e.printStackTrace();
}
return returnString;
}
//....................