How to drop keys from string json in java?

Question

I have a json string like this:

{\"a\":\"vala\", \"b\":\"valb\", \"c\":\"valc\"}

I want to convert the above string to a JSONObject so that I

Answer 1

org-json-java can do the things you want

import org.json.JSONException;
import org.json.JSONObject;

public class JsonTest {
    public static void main(String[] args) {
        try {
            JSONObject testObject = new JSONObject("{\"a\":\"vala\", \"b\":\"valb\", \"c\":\"valc\"}");
            testObject.remove("b");
            testObject.remove("c");
            System.out.println(testObject.toString());  // This prints out the json string
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }
}

The execution result is

{"a":"vala"}

Make sure you've downloaded and imported org.json-YYYYMMDD.jar from here before you run the above code.