Haga lo que hicimos en aula

Se crea una clase

package co.ancabu.test;

import co.ancabu.excepcion.ErrorEnConversionDeDuracionException;
import com.google.gson.FieldNamingPolicy;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;

import java.io.FileWriter;
import java.io.IOException;
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.ArrayList;
import java.util.List;

public class Api_movie {
    private static String json;
    private static List listPeliculas=new ArrayList();
    public static String getmovie(String pelicula){

        try {
            HttpClient client = HttpClient.newHttpClient();
            HttpRequest request = HttpRequest.newBuilder().uri(URI.create("http://www.omdbapi.com/?apikey=5b7d7608&t=" + pelicula)).build();
            HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
            json = response.body();
            System.out.println(json);
            return json;
        } catch (NumberFormatException e) {
            System.out.println("Ocurrio un error");
            System.out.println(e.getMessage());
        } catch (IllegalArgumentException e) {
            System.out.println("Error en la URI, verifique la direccion");
        } catch (ErrorEnConversionDeDuracionException e) {
            System.out.println(e.getMessage());
        } catch (Exception e) {
            System.out.println("Ocurrio un error inesperado");
        }
        return null;
    }

    public static List saveListMovie(String movie){

        Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).setPrettyPrinting().create();
        TitleOmdb myTitle = gson.fromJson(movie, TitleOmdb.class);
        System.out.println(myTitle);

        Title myTitles = new Title(myTitle);
        System.out.println(myTitles);

        listPeliculas.add(myTitles);

        return listPeliculas;
    }

    public static void exportMovies(List listPeliculas,String formato) throws IOException {
        Gson gson = new GsonBuilder().setFieldNamingPolicy(FieldNamingPolicy.UPPER_CAMEL_CASE).setPrettyPrinting().create();
        FileWriter escribirFile = new FileWriter("Peluculas"+formato);
        escribirFile.write(gson.toJson(listPeliculas));
        escribirFile.close();
    }

}

main

package principal;
import co.ancabu.test.Api_movie;
import java.io.IOException;
import java.util.List;
import java.util.Scanner;

public class MainSearch {
    public static void main(String[] args) throws IOException, InterruptedException {
        Scanner teclado=new Scanner(System.in);
        List listPeliculas=null;
        String movies;
        while (true) {
            System.out.println("Escriba el nombre de la pelicula");
            String pelicula = teclado.next();
            if(pelicula.equals("Salir")){
                break;
            }
            movies=Api_movie.getmovie(pelicula);
            listPeliculas=Api_movie.saveListMovie(movies);
        }
        if(listPeliculas.size()>0) {
            System.out.println("En que formato desea exportar 1) .txt 2) .json");
            int selectFormato=teclado.nextInt();
            String format=selectFormato==1?".txt":".json";
            Api_movie.exportMovies(listPeliculas,format);
            System.out.println("Finalizo la ejecucion");
        }

    }
}