Get size or length of json array response (restAssured Response interface) - rest-assured

Question

We have REST API automation scripts using RestAssured. In this declared response object as public static Response response; and retrieving the response data using response.jsonPath().get("id"), during this trying to even get the size or length of the id, even need to get details about tags array.
JSON Response:
[
{
"id": 1,
"name": "test1",
"tags": [
{
"tagType": "details1",
"tag": {
"description": null
}
}
]
},
{
"id": 2,
"name": "test2",
"tags": [
{
"tagType": "details2",
"tag": {
"description": null
}
}
]
}
]
Tried below ways:
public static Response response;
List<String> resIDs = response.jsonPath().get("id");
System.err.println("Retrieved IDs from Response: " + resIDs);
O/P: is [1,2,3,4,5,6,7]
Tried as resIDs.size(), that also no response printed.
List<Object> size = response.jsonPath().getList("$");
System.err.println("ArraySize for IDs from Response: " + size);
or
int size = response.jsonPath().getList("$").size();
O/P: Not printed/nothing shown
Please guide how to get the size/length.

Answer 1

I don't seem to find any issue in your code, I just changed a bit to run locally and its working fine. Here's my code
public class S_62591968 {
public static Response postCallWithJsonBodyParam(String URL) {
return RestAssured.given().relaxedHTTPSValidation().contentType(ContentType.JSON).request().when().get(URL);
}
public static void main(String[] args) {
String url_endPoint = "http://localhost:8089/def/abc";
Response response = postCallWithJsonBodyParam(url_endPoint);
List<String> resIDs = response.jsonPath().get("id");
System.out.println("Retrieved IDs from Response : " + resIDs);
System.out.println("ArraySize for IDs from Response : " + resIDs.size());
}
}
Console :
Retrieved IDs from Response : [1, 2]
ArraySize for IDs from Response : 2