JSON serialization/deserialization

Student.java

// Student.java
package com.shail;

import lombok.*;

@Getter
@NoArgsConstructor
@ToString
class Student {
  private int id;
  private String name;
}

////////////////////////////////////////////////////

//Main.java
package com.shail;

import com.fasterxml.jackson.databind.ObjectMapper;
import java.io.IOException;

public class Main {
  private static  ObjectMapper mapper = new ObjectMapper();
  private static final String jsonString = "{\"id\":\"21\", \"name\":\"Shail\"}";

  public static void main(String[] args) throws IOException {
    Student student = mapper.readValue(jsonString, Student.class);
    String studentString = mapper.writerWithDefaultPrettyPrinter().writeValueAsString(student);

    System.out.println(student);
    System.out.println(studentString);
  }
}