java rest client code example

Example 1: http client java

HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
      .uri(URI.create("http://openjdk.java.net/"))
      .build();
client.sendAsync(request, BodyHandlers.ofString())
      .thenApply(HttpResponse::body)
      .thenAccept(System.out::println)
      .join();

Example 2: java resto

char calculaLetra(int dni) 
{ 
    String juegoCaracteres="TRWAGMYFPDXBNJZSQVHLCKE"; 
    int modulo= dni % 23; 
    char letra = juegoCaracteres.charAt(modulo); 
    return letra; 
}