How have you used JDK 11 in your projects and what features did you work with?

In projects using JDK 11, I utilized new features and improvements introduced in this version:

• Local variables with var: you can use var to declare local variables with the type inferred by the compiler.
• New methods in standard APIs: for example, methods in String (isBlank, lines, repeat), Optional (ifPresentOrElse), Collection (toArray(IntFunction)), and others.
• HTTP Client API: a new standard HTTP client for asynchronous and synchronous requests.
• Flight Recorder and JFR Event Streaming: for monitoring and profiling applications.

Example of using the new HTTP client:

HttpClient client = HttpClient.newHttpClient();
HttpRequest request = HttpRequest.newBuilder()
    .uri(URI.create("https://example.com"))
    .build();

HttpResponse<String> response = client.send(request, HttpResponse.BodyHandlers.ofString());
System.out.println(response.body());

JDK 11 also supports running single-line Java scripts and improved Unicode handling.