Notable features of Java 11 to 17

Here are some notable features introduced in Java versions 11 to 17, along with example code:

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Java 11:

1. Local-Variable Syntax for Lambda Parameters:

• In Java 11, the ‘var’ keyword was introduced to allow the use of type inference for lambda parameters.
• The example demonstrates how you can use the ‘var’ keyword to declare lambda parameters without explicitly specifying the type.

// Before Java 11
Function<Integer, String> oldLambda = (Integer x) -> "The number is: " + x;

// With Java 11
Function<Integer, String> newLambda = (var x) -> "The number is: " + x;

2. HTTP Client (Standard):

• Java 11 introduced a new built-in HTTP client API that provides a more modern and flexible way to interact with HTTP services.
• The example demonstrates how to create an HTTP client, send a GET request to a specified URI, and retrieve the response body.

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

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

Java 12: