title: Gson .JsonSyntaxException - java.lang.NumberFormatException: Invalid double: ""
body: <p>I run this code and have crash. Do you can help me?</p>
  
  <pre><code>public class RepairCostsData {
  
  @Expose
  private int month;
  @Expose
  private int month_id;
  @Expose
  private int year;
  @Expose
  private double summa;
  @Expose
  private double detail_price;
  @Expose
  private double job_price;
  </code></pre>
  
  <p>...</p>
  
  <p><strong>Call Gson().fromJson() for this class</strong></p>
  
  <pre><code>RepairCostsData[] repairCostsData = new Gson().fromJson(jsonObject.getJSONArray(DATA).toString(),
                                                                  RepairCostsData[].class);
  </code></pre>
  
  <p>**JSON from server **</p>
  
  <p>[{"month":"","month_id":"3","year":"2014","detail_price":0,"job_price":0,"summa":0},{"month":"","month_id":"4","year":"2014","detail_price":0,"job_price":0,"summa":0},{"month":"","month_id":"5","year":"2014","detail_price":0,"job_price":0,"summa":0},{"month":"","month_id":"6","year":"2014","detail_price":0,"job_price":0,"summa":0},{"month":"Июль","month_id":"7","year":"2014","detail_price":"250.00","job_price":0,"summa":250},{"month":"","month_id":"8","year":"2014","detail_price":0,"job_price":0,"summa":0}]</p>
  
  <p><strong>Logs</strong> </p>
  
  <pre><code> com.google.gson.JsonSyntaxException: java.lang.NumberFormatException:
     Invalid double: ""
                 at com.google.gson.internal.bind.TypeAdapters$7.read(TypeAdapters.java:232)
                 at com.google.gson.internal.bind.TypeAdapters$7.read(TypeAdapters.java:222)
                 at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.read(ReflectiveTypeAdapterFactory.java:93)
                 at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.read(ReflectiveTypeAdapterFactory.java:172)
                 at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.read(TypeAdapterRuntimeTypeWrapper.java:40)
                 at com.google.gson.internal.bind.ArrayTypeAdapter.read(ArrayTypeAdapter.java:72)
                 at com.google.gson.Gson.fromJson(Gson.java:791)
                 at com.google.gson.Gson.fromJson(Gson.java:757)
                 at com.google.gson.Gson.fromJson(Gson.java:706)
                 at com.google.gson.Gson.fromJson(Gson.java:678)
                 at com.DriverNotes.AndroidMobileClientTest.model.server.statistics.RepairCosts.&lt;init&gt;(RepairCosts.java:29)
                 at com.DriverNotes.AndroidMobileClientTest.model.server.statistics.RepairCostsStatistics.&lt;init&gt;(RepairCostsStatistics.java:20)
                 at com.DriverNotes.AndroidMobileClientTest.network.VolleyServerConnector$48$1.run(VolleyServerConnector.java:780)
                 at java.lang.Thread.run(Thread.java:856)
  </code></pre>
  
  <p><strong>Crash in this line:</strong></p>
  
  <pre><code>RepairCostsData[] repairCostsData = new Gson().fromJson(jsonObject.getJSONArray(DATA).toString(),
                                                                  RepairCostsData[].class);
  </code></pre>