How to deal with "null" variables in JSON file?

fedpep

This is an excerpt of a JSON file I'm working on with Processing

"headlineReview":{
         "text":"Lorem ipsum dolor sit amet, consectetur adipiscing elit. Vivamus gravida dignissim neque, eu scelerisque lacus.",
         "author":"Lorem ipsum"
      },
      "classicalReview":null,
      "classicalReviewUri":null,

Sometimes the "headlineReview" is null (like "classicalReview") and some other times it contains a String (as shown above). How do I check if that particular field is null? I already tried with .getString(), .getBoolean() etc... but I always get an error so I cannot run an if statement.

Chrisir

pseudo code:

String test=null;

test=cccc.getString();

if(test!=null){

....

?

Also:

Maybe look at try catch.....

fedpep

As I said, the problem is that if I use .getString() I got the error "JSONObject["classicalReview"] is not a String"

GoToLoop

According to JSONObject's getString() reference here:
https://processing.org/reference/JSONObject_getString_.html

It got an override version w/ 2 arguments. In which we can set up an optional return value for when the "key" doesn't exist. :-B

fedpep

Thanks @GoToLoop, didn't see that!