How to delete JSONArray elements using Java

yaryan997 ：

my JsonArray is

[{
"Id": null,
"Name": "One New task",
"StartDate": "2010-02-03T05:30:00",
"EndDate": "2010-02-04T05:30:00",
"Duration": 1,
"DurationUnit": "d",
"PercentDone": 0,
"ManuallyScheduled": false,
"Priority": 1,
"parentId": 8,
"index": 0,
"depth": 3,
"checked": null },{
"Id": null,
"Name": "New task",
"StartDate": "2010-02-04T05:30:00",
"EndDate": "2010-02-04T05:30:00",
"Duration": 0,
"DurationUnit": "d",
"PercentDone": 0,
"ManuallyScheduled": false,
"Priority": 1,
"parentId": 8,
"index": 1,
"depth": 3,
"checked": null }]

Now I want to remove the ID from this JsonArray, ManualScheduled, checked,

I try to use jsonArray.remove(1)and in JAVA jsonArray.discard("Id"). But nothing happened. Am I deleting the array items wrong?

I am using JAVA as technology.

jabclab：

What you have is an array of objects. So you will have to iterate through the array and remove the necessary data from each object , e.g.

for (int i = 0, len = jsonArr.length(); i < len; i++) {
    JSONObject obj = jsonArr.getJSONObject(i);
    // Do your removals
    obj.remove("id");
    // etc.
}

I'm assuming you're using org.json.JSONObjectand org.json.JSONArray, but the body remains the same no matter what JSON processing library you use.

If you want to convert [{"id":215},{"id":216}]to [215,216], you can do this:

JSONArray intArr = new JSONArray();
for (int i = 0, len = objArr.length(); i < len; i++) {
    intArr.put(objArr.getJSONObject(i).getInt("id"));
}

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