How can parse primitive json array contains null with Gson?

Question

Json String

{"userName":null," msgArr":[null],"numrow":0} //String result

Gson

new Gson().fromJson(result, MyClass.class);

MyClass

public String userName;
public int[] msgArr;
...

Error Stack

at java.lang.IllegalArgumentException: Primitive array can't take null values.
at java.lang.reflect.Array.set(Array.java:406)
at com.google.gson.internal.bind.ArrayTypeAdapter.read(ArrayTypeAdapter.java:78)
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.Gson.fromJson(Gson.java:803)
at com.google.gson.Gson.fromJson(Gson.java:768)
at com.google.gson.Gson.fromJson(Gson.java:717)
at com.google.gson.Gson.fromJson(Gson.java:689)
at com.test.dao.RequestBase.onPostExecute(RequestBase.java:79)

How can avoid this exception if I can not change json string "msgArr=[null]"?

Answer 1

user2507946 has the right answer in your comments.

int is not nullable in Java but you can substitute the wrapper class Integer to handle null values.

Example

public String userName;
public Integer[] msgArr;
...

Answer 2

Gson gson = new GsonBuilder
     .serializeNulls()
     .create();