课程

You've reached Level 33

"Hi, Amigo!" "Hi, Bilaabo!" "I'm glad to see you. Today we have a small but very informative lesson. Today I will tell you about the JavaScript language ..."

"False alarm. Everything is fine with my relief valve." "Let's continue. Today I want to explain what JSON is." "Yeah, I've heard that word many times. What does it mean?" "With the web's growth, HTML pages with JavaScript began to actively communicate with servers and download data from servers. To make this process easier, a standard was invented for communication between the server and a JavaScript program ..."

"Hi, Amigo!" "Hi, Ellie!" "Since you've already been introduced to JSON, let's talk more about it today." "OK. Where is it usually used?" "Here's how it usually works. Someone (the client) requests data from a Java program (the server). The program creates Java objects and fills them with information from the database. It then converts them into a format that the requester (the client) can understand ..."

"Hi, buddy!" "Hey, Diego." "I see here you've learned the basics of JSON serialization?" "What do you mean 'basics'? I know a lot!""So naive. You don't know the half of it. Ten percent at best." "You're kidding. What else is there?" "Deserialization of an object hierarchy (polymorphic deserialization), deserialization of collections, and a whole lot more! The Jackson framework is large and powerful ..."

"How's it going?" "Great. Can't complain. Today Bilaabo told me about JavaScript. Not everything, of course, but more than just a little. Of course, I still haven't written anything in JS, but I don't think it would be difficult." "And Ellie told me about JSON serialization. And you explained the Jackson framework and how to set up 'polymorphic deserialization' using annotations ..."

"Not so fast, young man! I have two more lessons for you!" "Two? Wow. Well, okay. What wouldn't you do to enhance your own coolness! I'm all ears." "XML, like JSON, is often used when passing data between different programs and computers. And there are several frameworks that greatly simplify the lives of Java programmers when working with XML. Today I will introduce you to one of them ..."

"Okay, then. As you've probably already guessed, that wasn't everything." "Now I'll tell you about several other aspects of JAXB. But as we did with JSON, we will begin with collections." "When deserializing collections using JAXB, there is also uncertainty about which particular collection (ArrayList, LinkedList, Vector, etc.) to use for the List variable ..."

"Here are some exercises ..."