Pootie Tang Pootie Tang - 1 year ago 119
JSON Question

Parsing JSON - Can't get boolean value from JsonObject

I've been trying to figure out how to do some basic stuff in Java..

I've got a request being made to an API, which returns the following JSON.

{"success": false, "message": "some string", "data": []}

This is represented by the String
in the following:

JsonObject root = new JsonParser().parse(result).getAsJsonObject();
success = root.getAsJsonObject("success").getAsBoolean();

I need to get the "success" parameter as a boolean. Getting an error on the

java.lang.ClassCastException: com.google.gson.JsonPrimitive cannot be
cast to com.google.gson.JsonObject

What am I doing wrong? How do I get the bool value of "success"?

Answer Source

The reason that is breaking your code is that you are calling the wrong method...


success = root.get("success").getAsBoolean();

instead of

success = root.getAsJsonObject("success").getAsBoolean();


public static void main(String[] args) {
    String result = "{\"success\": false, \"message\": \"some string\", \"data\": []}";
    JsonObject root = new JsonParser().parse(result).getAsJsonObject();
    boolean success = root.get("success").getAsBoolean();
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