How can we convert map to JSON object in Java?

JSON is a lightweight , text based and language agnostic >Data exchange format. JSON can represent two structured types, such as object and array. An object is an unordered collection of key /value pairs, and an array is an ordered sequence of values.

We can use the toJSONString() method to convert the Map into a JSON object ( >static) ##org.json.simple.JSONValue. It has two important static methods: writeJSONString()The method encodes the object into JSON text and writes it out, escape()The method escapes special characters and Meaningful quotation marks, \, /, \r, \n, \b, \f, \t.

Example

import java.util.*;
import org.json.simple.JSONValue;
public class ConvertMapJSONTest {
   public static void main(String[] args) {
      Map<String, Object> map = new HashMap<String, Object>();
      map.put("1", "India");
      map.put("2", "Australia");
      map.put("3", "England");
      map.put("4", "South Africa");
      String jsonStr = JSONValue.toJSONString(map); // converts Map to JSON
      System.out.println(jsonStr);
   }
}

Output

{"1":"India","2":"Australia","3":"England","4":"South Africa"}

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