Access JSON value called "class" with Gson

Question

I am trying to get the value of class in the following JSON:

{    
    "battlegroup": "Misery",
    "class": 1,
    "race": 4,
    "gender": 0
}

I access the other fields (battlegroup, race etc.) with:

WoWDetails info = gson.fromJson(response, WoWDetails.class);
raceID = info.race;

WoWDetails is as following:

class WoWDetails {
// character details
   public String battlegroup;
   public Integer achievementPoints;
   public Integer race;
   public Integer class;
}

But if I try WoWDetails.class it's giving me an error saying "Unknown class: info". Which makes sense because info is not a class.

Is there a way around this? Can I escape the word "class" in any way possible?

The name class is not editable, since it's not my API.

Duplicate of http://stackoverflow.com/questions/28957285/what-is-the-basic-purpose-of-serializedname-annotation-in-android-using-gson — Lyubomyr Shaydariv, Apr 20 '17 at 12:45

PEHLAJ · Answer 1 · 2017-04-20T12:55:27.753

3

You can map the class field to JSON key using @SerializedName

WowDetails.java

public class WoWDetails {

    String battlegroup;

    @SerializedName("class")
    int className;

    int race;
    int gender;

}

edited Apr 20 '17 at 12:55

answered Apr 20 '17 at 12:53

PEHLAJ

9,980
9
41
53

Thank you, it worked! But the other answer did too, which one do I accept? *General question* – R. Montanje Apr 20 '17 at 12:55
To be fair, this deserves to be upvoted just because this is not a jsonschema2pojo copy/paste. – Lyubomyr Shaydariv Apr 20 '17 at 12:55
Always accept the answer which explains the answer so that you can learn. – PEHLAJ Apr 20 '17 at 12:58
Okay, thanks! They're both good answers, the 1st one has more explanation. But they worked both for me. Thanks! – R. Montanje Apr 20 '17 at 13:02
I'm pretty surprised that this answer was not accepted. – Lyubomyr Shaydariv Apr 20 '17 at 13:08

score 2 · Accepted Answer · answered Apr 20 '17 at 12:50

2

Set your Package name

package com.nonprofit.nonprofit;

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class WoWDetails {

    @SerializedName("battlegroup")
    @Expose
    private String battlegroup;
    @SerializedName("class")
    @Expose
    private Integer _class;
    @SerializedName("race")
    @Expose
    private Integer race;
    @SerializedName("gender")
    @Expose
    private Integer gender;

    public String getBattlegroup() {
        return battlegroup;
    }

    public void setBattlegroup(String battlegroup) {
        this.battlegroup = battlegroup;
    }

    public Integer getClass_() {
        return _class;
    }

    public void setClass_(Integer _class) {
        this._class = _class;
    }

    public Integer getRace() {
        return race;
    }

    public void setRace(Integer race) {
        this.race = race;
    }

    public Integer getGender() {
        return gender;
    }

    public void setGender(Integer gender) {
        this.gender = gender;
    }

}

You can get your details like below

WoWDetails info = gson.fromJson(response, WoWDetails.class);

info.getGender();
info.getRace();

answered Apr 20 '17 at 12:50

pradeep

307
1
8

Is "info.getClasses_" supposed to be with underscore? What is the purpose of this? – R. Montanje Apr 20 '17 at 12:54
you will be able to get your value in info.getClass_(); – pradeep Apr 20 '17 at 12:57
You can get your getter and setter from this site http://www.jsonschema2pojo.org/ – pradeep Apr 20 '17 at 12:58
@R.Montanje `class` is a reserved word and the way you though it should work causes Java syntax errors. – Lyubomyr Shaydariv Apr 20 '17 at 12:59
Yeah I noticed it was, I just needed a way around it, and I got it :) – R. Montanje Apr 20 '17 at 13:00
Class is java default keyword so if creating a getter and setter need to set_. – pradeep Apr 20 '17 at 13:00

Access JSON value called "class" with Gson

2 Answers2