Java: JSONObject.toString() - adding extra space after colon (":" -> ": ")

Question

Been googling a while but haven't found anything useful since keywords are too common.

Currently in my Java code method toString() (called on some JSONObject object) produces output like this:

{"key_name":<numerical_value>}

while what I need (due to the fact that parser on the other side of the project is imperfect) is:

{"key_name": <numerical_value>}

The only difference is that extra space after colon. Is there any JSONObject builtin way to do it or do I need some handwritten simple string operation for it?

Answer 1

I can only imagine building a custom JSONStringer. In fact, it could be a JSONWriter built using a StringWriter. Then you override all the value methods to add a space before calling parent class method.

class JSONSpaceStringer extends JSONWriter {
    private StringWriter sw;

    JSONSpaceStringer(StringWriter sw) {
        parent(sw); // initialize parent
        this.sw = sw;
    }

    @Override
    public JSONWriter value(long l) throws JSONException {
        sw.write(" "); // add an initial space
        parent.value(l); // and let parent class do the job...
    }

// same for all other value methods
//...
}