How to Update JSONArray value on java

Question

can anyone help me, i'am new on java programing

let say i have JSONArray with this data below :

[{
    "STATUSUPDATE": 0,
    "IDSERV": "2"
}, {
   "STATUSUPDATE": 0,
   "IDSERV": "3"
}, {
   "STATUSUPDATE": 0,
   "IDSERV": "1"
}]

How to update STATUSUPDATE to 1 in IDSERV 2

How to update STATUSUPDATE to 2 in IDSERV 3

and was trying to loop the data

for (int i=0; i < array.length; i++){
JSONObject itemArr = (JSONObject)array.get(j);
if(itemArr.get("IDSERV").equals(2)){
//should be itemArr.set(with new val) 
//but method *set* can cal; only on JSONArray not an JSONObject
//and looping the next one 
}
}

can anyone help me

Answer 1

JSONArray specific code:

Output

Initial array : [{"STATUSUPDATE":0,"IDSERV":"2"},{"STATUSUPDATE":0,"IDSERV":"3"},{"STATUSUPDATE":0,"IDSERV":"1"}]
Output array : [{"STATUSUPDATE":"1","IDSERV":"2"},{"STATUSUPDATE":"2","IDSERV":"3"},{"STATUSUPDATE":0,"IDSERV":"1"}]

Code

public class Test {
    public static void main(String[] args) throws JSONException {
        JSONArray array = new JSONArray("[{\"STATUSUPDATE\":0,\"IDSERV\":\"2\"},{\"STATUSUPDATE\":0,\"IDSERV\":\"3\"},{\"STATUSUPDATE\":0,\"IDSERV\":\"1\"}]");
        System.out.println("Initial array : " + array);

        for (int i=0; i < array.length(); i++){
            JSONObject jsonObject = new JSONObject(array.get(i).toString());
            if(jsonObject.get("IDSERV").equals("2")) {
                jsonObject.put("STATUSUPDATE", "1");
                array.put(i, jsonObject);
            }
            else if(jsonObject.get("IDSERV").equals("3")) {
                jsonObject.put("STATUSUPDATE", "2");
                array.put(i, jsonObject);
            }
        }

        System.out.println("Output array : " + array);
    }
}