It seems just fine to me. There is nothing in the GSON instance that makes it related to a specific instance of LoginSession, so it should be static. GSON instances should be thread-safe, and there was a bug regarding that which was fixed.
This is simple code to do it, I avoided all checks but this is the main idea. public String parse(String jsonLine) { JsonElement jelement = new JsonParser().parse(jsonLine); JsonObject jobject = jelement.getAsJsonObject(); jobject = jobject.getAsJsonObject(“data”); JsonArray jarray = jobject.getAsJsonArray(“translations”); jobject = jarray.get(0).getAsJsonObject(); String result = jobject.get(“translatedText”).getAsString(); return result; } To make the use more generic – … Read more
If anyone ever comes across this in the future because you are trying to define your own custom converter factory and are getting this error, it can also be caused by having multiple variables in a class with a misspelled or the same serialized name. IE: public class foo { @SerializedName(“name”) String firstName; @SerializedName(“name”) String … Read more
Even without seeing your JSON string you can tell from the error message that it is not the correct structure to be parsed into an instance of your class. Gson is expecting your JSON string to begin with an object opening brace. e.g. { But the string you have passed to it starts with an … Read more
It seems that you need to define formats for both date and time part or use String-based formatting. For example: Gson gson = new GsonBuilder() .setDateFormat(“EEE, dd MMM yyyy HH:mm:ss zzz”).create(); or using java.text.DateFormat Gson gson = new GsonBuilder() .setDateFormat(DateFormat.FULL, DateFormat.FULL).create(); or do it with serializers: I believe that formatters cannot produce timestamps, but this … Read more
You may use TypeToken to load the json string into a custom object. logs = gson.fromJson(br, new TypeToken<List<JsonLog>>(){}.getType()); Documentation: Represents a generic type T. Java doesn’t yet provide a way to represent generic types, so this class does. Forces clients to create a subclass of this class which enables retrieval the type information even at … Read more
I looked at Google’s Gson as a potential JSON plugin. Can anyone offer some form of guidance as to how I can generate Java from this JSON string? Google Gson supports generics and nested beans. The [] in JSON represents an array and should map to a Java collection such as List or just a … Read more
Here you go: import java.lang.reflect.Type; import com.google.gson.reflect.TypeToken; Type type = new TypeToken<Map<String, String>>(){}.getType(); Map<String, String> myMap = gson.fromJson(“{‘k1′:’apple’,’k2′:’orange’}”, type);
use JsonParser; for example: JsonObject o = JsonParser.parseString(“{\”a\”: \”A\”}”).getAsJsonObject();
The problem is you’re telling Gson you have an object of your type. You don’t. You have an array of objects of your type. You can’t just try and cast the result like that and expect it to magically work 😉 The User guide for Gson Explains how to deal with this: https://github.com/google/gson/blob/master/UserGuide.md This will … Read more