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Java 11 Cookbook

Java 11 Cookbook

By : Nick Samoylov, Sanaulla
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Java 11 Cookbook

Java 11 Cookbook

1 (1)
By: Nick Samoylov, Sanaulla

Overview of this book

For more than three decades, Java has been on the forefront of developing robust software that has helped versatile businesses meet their requirements. Being one of the most widely used programming languages in history, it’s imperative for Java developers to discover effective ways of using it in order to take full advantage of the power of the latest Java features. Java 11 Cookbook offers a range of software development solutions with simple and straightforward Java 11 code examples to help you build a modern software system. Starting with the installation of Java, each recipe addresses various problem by explaining the solution and offering insights into how it works. You’ll explore the new features added to Java 11 that will make your application modular, secure, and fast. The book contains recipes on functional programming, GUI programming, concurrent programming, and database programming in Java. You’ll also be taken through the new features introduced in JDK 18.3 and 18.9. By the end of this book, you’ll be equipped with the skills required to write robust, scalable, and optimal Java code effectively.
Table of Contents (18 chapters)
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Making an HTTP request for a protected resource


In this recipe, we will look at invoking an HTTP resource that has been protected by user credentials. http://httpbin.org/basic-auth/user/passwd has been protected by HTTP basic authentication. Basic authentication requires a username and a password to be provided in plain text, which is then used by the HTTP resources to decide whether the user authentication is successful. 

If you open http://httpbin.org/basic-auth/user/passwd in the browser, it will prompt you for the username and password:

Enter the username as user and password as passwd, and you will be authenticated to be shown a JSON response:

{
  "authenticated": true,
  "user": "user"
}

Let's achieve the same thing using the HttpClient API.

 

How to do it...

  1. We need to extend java.net.Authenticator and override its getPasswordAuthentication() method. This method should return an instance of java.net.PasswordAuthentication. Let's create a class, UsernamePasswordAuthenticator, which extends...

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