updating json object using java [closed]

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Closed 6 years ago.

Let i've an JSON Object like as shown below

{"Name":"Manu","Age":"25","Address":""}

Updation

Read the json object and need to update the address field like as given below

 {"Name":"Manu","Age":"25","Address":"XXXX"}

can anyone please tell me how to update the Address details in the JSON using java

My code

JSONObject rec = new JSONObject(data);
String name = rec.getString("Name");
String age  = rec.getString("Age"); 
String add  = rec.getString("Address"); 

now how to add some information to the address field

Update 1

String jsonstring="{Name:Manu,Age:25,Address:''}";
JSONObject object=new JSONObject(jsonstring);
JSONObject childobject=object.getJSONObject("Address");

JSONObject modifiedjson=new JSONObject();
modifiedjson.put("type",childobject.get("type"));
modifiedjson.put("value","newvalue"); 

Exception

Exception in thread "main" org.json.JSONException: JSONObject["Address"] is not a JSONObject.
    at org.json.JSONObject.getJSONObject(JSONObject.java:557)
    at kotouch.Sample.main(Sample.java:59)
Java Result: 1

Answer 1

Parse the JSON and call the particular Key needs to be updated and set the value for the key. Please be more specific.

Create a new JSON Object

private JSONObject Data = new JSONObject;

public Test(){

try {

Data.put("address", username);
    }

catch (JSONException e) {

  // TODO Auto-generated catch block

  e.printStackTrace();
    }
}

Answer 2

If you are using the JsonObject class it is immutable

So i believe you have to duplicate the object and change the value like this:

JSONObject object=new JSONObject(jsonstring);
JSONObject childobject=object.getJSONObject("XXXX");

JSONObject modifiedjson=new JSONObject();
modifiedjson.put("type",childobject.get("type"));
modifiedjson.put("value","newvalue");  // Add new value of XXXX here