Gson fromJson() returns object with null attrubutes

Question

I\'m trying to create some Java objects using this line:

Quiz currentQuiz = gson.fromJson(json, Quiz.class);

But the all I get is this:

Answer 1

In my case I had deleted

@SerializedName("OpCode")
@Expose

parts from my model class which are above the

private Integer opCode;

line. And so Gson could not parse it and so my attributes were null. When I added those lines it fixed.