title: Parse a nested JSON using gson
body: <pre><code>{
      "Response": {
          "MetaInfo": {
              "Timestamp": "2011-11-21T14:55:06.556Z"
          },
          "View": [
              {
                  "_type": "SearchResultsViewType",
                  "ViewId": 0,
                  "Result": [
                      {
                          "Relevance": 0.56,
                          "MatchQuality": {
                              "Country": 1,
                              "State": 1,
                              "County": 1,
                              "City": 1,
                              "PostalCode": 1
                          },
                          "Location": {
                              "LocationType": "point",
                              "DisplayPosition": {
                                  "Latitude": 50.1105,
                                  "Longitude": 8.684
                              },
                              "MapView": {
                                  "_type": "GeoBoundingBoxType",
                                  "TopLeft": {
                                      "Latitude": 50.1194932,
                                      "Longitude": 8.6699768
                                  },
                                  "BottomRight": {
                                      "Latitude": 50.1015068,
                                      "Longitude": 8.6980232
                                  }
                              },
                              "Address": {
                                  "Country": "DEU",
                                  "State": "Hessen",
                                  "County": "Frankfurt am Main",
                                  "City": "Frankfurt am Main",
                                  "District": "Frankfurt am Main",
                                  "PostalCode": "60311",
                                  "AdditionalData": [
                                      {
                                          "value": "Germany",
                                          "key": "CountryName"
                                      }
                                  ]
                              }
                          }
                      }
                  ]
              }
          ]
      }
  }
  </code></pre>
  
  <p>I am trying to retrieve the postal code from the above JSON. I am using gson to parse it. I am very new to JSON and from what i read from all the posts here(some very similar to this), I understood that the fields name should be as it is. So I understand i have to make 4 classes viz Response, view, Result and Address. I made them static nested classes, but I am only getting null value as output. In the next JSON, I have multiple addresses. But I am stuck on this single response.</p>
  
  <p>For a short example, I try to retrieve Timestamp with this code, but it gives me a null value</p>
  
  <pre><code>public class ParseJSON {
      public static void main(String[] args) throws Exception {
          BufferedReader br = new BufferedReader(new FileReader("try.json"));
  
          Gson gson = new GsonBuilder().create();
          Pojo pojo = gson.fromJson(br,Pojo.class);
          System.out.println(Pojo.Response.MetaInfo.Timestamp);
          br.close();
      }
  }
  
  class Pojo {
      public Pojo() { }
  
      static class Response{
          static class MetaInfo {
              static public String Timestamp;
  
              public String getTimestamp() {
                      return Timestamp;
              }
          }
      }
  }
  </code></pre>