The JetBrains Blog

How often do you use 'Go To Class/File/Symbol' feature in IntelliJ IDEA? Pretty often I would guess. But do you know everything you can do with it? Let me go through a couple of often overlooked gems. Do you know that when you search for file or class you can preview an image (Ctrl-Shift-I) or see …

Have you ever found yourself in a situation when there is a file that exists on the disc but IntelliJ IDEA doesn't show it anywhere? You press synchronize but nothing happens? OK, may be the next few tips will be helpful. Check "Ignored files and folders" in File | Settings | File Types: Check…

One of the latest features was long awaited fork mode for JUnit run configurations. Since now it is possible to run your tests in separate VMs. It is possible to choose to fork on class level only. Check out the list of all changes in the release notes on the IntelliJ IDEA EAP page and download the…

Java 7 provides a way to remove a compiler warning about generics vararg invocation. With Java 7 you can annotate your vararg method with SafeVararg annotation and your clients won't get these nasty warnings any more. IntelliJ IDEA 10.5 will help you to perform this migration. It will find for you a…

For quite a while IntelliJ IDEA can detect probable NPE’s in your code. But you have to annotate it with JetBrains' @Nullable/@NotNull. In order to leave your code free from JetBrains' annotations you could use external annotations, but they were not so convenient to use as they were not visible in …

As a logical next step after inplace introduce variable refactoring we did in IntelliJ IDEA 10, version 10.5 will offer inplace introduce parameter. Here is a brief overview of what we're working on. Once called, it will gently ask you to choose a method you want to add parameter to Note, that y…

For a long time already IntelliJ IDEA can detect probable NPE's in your code. You need to annotate your methods/fields/variables with @Nullable/@NotNull annotations and IntelliJ IDEA will highlight possible contract violations. Good. But the annotations only begin to work when there is enough of the…

Introduce variable is one of those refactorings used many times a day. So, how can we make it work faster? Get rid of modal dialogs! So, in order to introduce a variable from an expression press Ctrl+Alt+V. Remember modal dialog? No more of it! Now you can edit your code right in the editor: Oh…

Most of applications initially are single threaded, and IntelliJ IDEA was no different; though luckily, now it isn't — but we had to adapt our code to use multiple threads. In this post I'm going to tell you how. In our example we see SAXBuilder, which is too expensive to be created every time we n…

To quickly create a new class I press Alt+Home and then Alt+Ins. And you?…

I often forget to add newly created tests to the testng.xml, which is used in our TeamCity build, and by the time I realize that they don't run something is surely went wrong. What a bummer! Not any more, fortunately — IntelliJ IDEA makes sure no tests are missing. All it takes is to enable th…

With IntelliJ IDEA you can quickly clean up your legacy code. If a problem occurs multiple times in a file, you do not need to manually apply a quick-fix every time — use the Fix all intention to repair them all at once.…