Lessons

You've reached Level 39

"Hi, Amigo!" "Hello, Bilaabo! What are we doing today?" "Today I'm going to tell you how to install a Tomcat web server." "What's a web server? What's a regular server?" "There is a way for programs to interact called a client-server relationship. The server serves client requests. Clients send their requests to the server, and the server fulfills them and returns the result ..."

"Here I am. As requested, I'll now tell you how to write your first web server." "A web server is like an operating system. It's not valuable in and of itself. It's valuable because you can run special web programs (servlets) on it." "It's these servlets that process the requests that come from users." "How do they process requests? How do I run my program inside a web server? ..."

"Hi, Amigo!" "Hi, Ellie! Did you do your hair differently? It looks good on you!" "Really? Thanks!" "Today I'm going to tell you about working in IntelliJ IDEA." "But I've been using it for quite a while now." "Yes, I know. That's why I want to tell you about a few things that make life much simpler." "The first and most important thing that every developer must be able to do is debug programs ..."

"But that's not all. "Why do you think debug mode was invented?" "That was a rhetorical question." "The most interesting thing is that, while debugging, you can watch the value of every variable at every step! This includes local method variables, arguments, and almost anything really." "When you reach a breakpoint in debug mode, a special panel appears at the bottom ..."

"In addition to Watches, there's also a powerful feature called Evaluate Expression." "You right-click a variable in the code and select Evaluate Expression in the menu. Or simply press Alt+F8." "Then a magical window opens where you can calculate the value of any expression ..."

"And now a few more new features as a special treat." "These are not the most important functions, but they are some of the most frequently used." "Searching files in the project." "You'll find that real projects usually have thousands of files. They include java, properties, xml, html, css, and js files — and much more." "Sometimes you'll remember the name of a file or class, but won't remember its exact location ..."

Hello again." "Hi!" "Today I'm going to tell you about refactoring. Refactoring is changing the code in a project without changing its functionality." "But how is that possible?" "Well, in the simplest cases, we could rename variables and/or methods. After all, changing the name of a variable won't make the program work differently, will it?" "Of course not." "You can also break large methods into several ..."

"I want to tell you about a few more magic tricks." "Please do! Today is simply a day of miracles. It seems I haven't been using half of IntelliJ IDEA's features." Magic trick #4: Search. "Imagine that you've opened a file with 5,000 lines, and you need to find a method called getProcessTask. Or getProcessorTask or getTaskProcessor or something like that." "IntelliJ IDEA has a very powerful mechanism for searching ..."

"Hi, Amigo. Here, take this interesting task ..."

"Just two small items left." Magic trick #6: Surround with."For example, suppose we want to wrap some code in a try-catch block. IntelliJ IDEA also has a key combination for this: Ctrl+T.." "Just select some code, e.g. the same println method in the printAddress method — and press Ctrl+T. Here's what we get ..."

"Hi, Amigo!" "Let's continue our lessons on how to google." "Here are some exercises ..."