How to Fix the \"Expected BEGIN_ARRAY but was BEGIN_OBJECT\" Error in Gson Parsing?

Error: Expected BEGIN_ARRAY but was BEGIN_OBJECT

This error occurs when Gson expects an array of JSON objects, but encounters an object instead.

Server URL and Request:

The server URL returns a JSON object containing details about a timezone. The request is performed using HttpClient.

Post Class:

The Post class defines a POJO to represent the JSON response. It has a single property: timeZoneId.

Cause of Error:

The error occurs because Gson is configured to expect an array of Post objects, but the JSON response is actually a single object.

Solution:

To resolve the error, modify the code to handle a single Post object instead of an array:

<code class="java">Post post = gson.fromJson(reader, Post.class);</code>

This will instruct Gson to parse the JSON response as a single Post object, which will no longer trigger the "Expected BEGIN_ARRAY" error.

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