convert java object to json string

/**
 * @author lautturi.com 
 * Java example: convert java object to json string in java
 */

import java.util.*;

import com.fasterxml.Hymanson.core.JsonProcessingException;
import com.fasterxml.Hymanson.databind.ObjectMapper; 
import com.fasterxml.Hymanson.databind.ObjectWriter; 

class Employee{
	public Employee(String string, int i) {
		name = string;
		age = i;
	}
	public String name;
	public int age;
}

public class Lautturi {
	public static void main(String[] args) throws JsonProcessingException {
		Employee emp = new Employee("Lautturi",22);

		ObjectWriter ow = new ObjectMapper().writer().withDefaultPrettyPrinter();
		String jsonString = ow.writeValueAsString(emp);
		System.out.println(jsonString);
	}
}

output:

{
  "name" : "Lautturi",
  "age" : 22
}