Gson.JsonSyntaxException - java.lang.NumberFormatException: Invalid double: ""

I run this code and it crashes. Could you help me?

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;

      

        
        
        
      

    

...

Calling Gson (). fromJson () for this class

RepairCostsData[] repairCostsData = new Gson().fromJson(jsonObject.getJSONArray(DATA).toString(),
                                                                RepairCostsData[].class);

      

        
        
        
      

    

** JSON from server **

[{"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": "July", "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}]

Magazines

 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.<init>(RepairCosts.java:29)
               at com.DriverNotes.AndroidMobileClientTest.model.server.statistics.RepairCostsStatistics.<init>(RepairCostsStatistics.java:20)
               at com.DriverNotes.AndroidMobileClientTest.network.VolleyServerConnector$48$1.run(VolleyServerConnector.java:780)
               at java.lang.Thread.run(Thread.java:856)

      

        
        
        
      

    

Failure on this line:

RepairCostsData[] repairCostsData = new Gson().fromJson(jsonObject.getJSONArray(DATA).toString(),
                                                                RepairCostsData[].class);