Print data of JSONObject in java.

Question

I have a JSONObject consisting of a simple json document(doesn't consists nested objects or JSONArray). I want to print that data.

import org.json.JSONObject;
import java.util.Scanner;
public class Test2{
  public static void main(String[] args) {
    Scanner scan=new Scanner(System.in);
    String s=scan.nextLine();
    JSONObject j=new JSONObject(s);
    // What code should I write here
  }
}

Let us say if the input is {fname:"Stack", lname:"Overflow"} then the output should be:-

fname => Stack
lname => Overflow

If the input is {country:"India", city:"Delhi"}then the output should be:-

country => India
city => Delhi

Can you please help me how I can do it.

score 1 · Accepted Answer · answered Jul 18 '18 at 11:40

1

From the documentation you can iterate over the keys, and take the values :

Using Streams :

j.keySet().stream().map(k -> k +"=>"+ j.get(k)).forEach(System.out::println);

Using classic for each loop

for(String key : j.keySet()){
    String val = j.getString(key);
    System.out.println(key +"=>"+ val);
}

^{Also you JSON is not valid, it should be {"fname":"Stack", "lname":"Overflow"}}

answered Jul 18 '18 at 11:40

azro

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you should not spend this much time answering a question that has been asked and answered many times before already. Just throw a close vote at it and move on – Tim Jul 18 '18 at 11:45
@TimCastelijns I usually, and always do that when possible, but duplicates came after my answer, and I did not know them, also I did not use the same way but less old wy as for each and stream and not basic arry iteration like in the link – azro Jul 18 '18 at 11:48
*duplicates came after my answer* - it takes 10 seconds to search for them. You can also do this yourself before answering – Tim Jul 18 '18 at 11:52

Print data of JSONObject in java.

1 Answers1