I want to make a JSON object and define its keys. I will initialize values to it later. Is there any way to do that? I want something like this when i print the JSONObject before initializing values to it and after defining it:
education:{ "name":"", "year":, "qualification": }
i.e only keys are there,no values to them exist. how do i define this "education" object. i know its defination can be:
JSONObject education=new JSONObject();
but where do the keys fit in here?
You can simply create a JSON object and then put each attribute with an empty string.
here is the code:
JSONObject education = new JSONObject();
education.put("name",new String());
education.put("year",new String());
education.put("qualification",new String());
You simply cannot have only keys defined. What you are essentially trying to say is I want these fields, but without defining the type of these fields. So even if let's say hypothetically it was allowed, how would you know what to expect as a value for any of the field.
education:{ "name":"", "year":, "qualification": }
From just this declaration, we cannot figure out is name again a JSON object? or a String field? same goes with other fields.
So the solution to your query would be, have default values for these fields. Ex. if it's a string have ""(empty string), if it's an object put null.
Then in turn you can modify them as and when you get actual values.
education:{ "name":null, "year":null, "qualification": null }