How can I prevent gson from converting integers to doubles

Question

I\'ve got integers in my json, and I do not want gson to convert them to doubles. The following does not work:

@Test
public void keepsIntsAsIs(){
    String          


        

Answer 1

This works fine for me:

private static class DoubleSerializer implements JsonSerializer {
    @Override
    public JsonElement serialize(Double src, Type typeOfSrc, JsonSerializationContext context) {
        return src == src.longValue() ? new JsonPrimitive(src.longValue()) : new JsonPrimitive(src);
    }
}

Gson gson = new GsonBuilder().registerTypeAdapter(Double.class, new DoubleSerializer()).setPrettyPrinting().create();