How to create Json Object using Streaming Model API?

package com.javaapi.json.examples;

import java.io.StringWriter;

import javax.json.Json;
import javax.json.stream.JsonGenerator;

public class CreateJsonObjGenEx {

	public static void main(String a[]){
		
		StringWriter strWtr = new StringWriter();
		JsonGenerator jsonGen = Json.createGenerator(strWtr);
		JsonGenerator start = jsonGen.writeStartObject();
		start.write("emp_name", "Nataraj G");
		start.write("emp_id", 1016);
		start.write("salary", 20000);
		start.writeEnd();
		jsonGen.close();
		
		System.out.println(strWtr.toString());
	}
}

{"emp_name":"Nataraj G","emp_id":1016,"salary":20000}