Exe34.java

package in.ajduke.ap013;

import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

public class Example34 {
  public static void main(String[] args) {
    
    Gson gson = new Gson();
    String json = gson.toJson(new JsonClass());
    System.out.println("Default behaviour....");
    System.out.println(json);
    
    gson = new GsonBuilder().setFieldNamingPolicy(
    FieldNamingPolicy.LOWER_CASE_WITH_DASHES).create();
    json = gson.toJson(new JsonClass());
    System.out.println("\nFields with lower case with dashes...");
    System.out.println(json);
    
    gson = new GsonBuilder().setFieldNamingPolicy(
    FieldNamingPolicy.UPPER_CAMEL_CASE_WITH_SPACES).create();
    json = gson.toJson(new JsonClass());
    System.out.println("\nFields with upper case with spaces...");
    System.out.println(json);
    
  }
}

class JsonClass {
  String myField = "value1";
  String myAnotherField = "value2";
}