We can select increasing or decreasing sections of code near the cursor with ⌥ and Up or Down arrows (MacOS) and Ctrl+W or Ctrl+Shift+W (Windows/Linux).
But we can also type the name of something to run to search for other run configurations. By default, this shows a list of recently run configurations. No matter where we are in the IDE or which file is open, if we double tap Ctrl the Run Anything window opens. We can run anything from anywhere by pressing the Ctrl key twice. If, for example, we press Alt and F7 on this interface name, the search window will show all the places the interface is used, whether it’s a field declaration or a class that implements this interface. Alt+F7 will show us all the places something is used.
Instead of finding the declaration, often we want to find where something is used. See Source Code Navigation for more tips like these last two shortcuts. If we press ⌥⌘B (MacOS) or Ctrl+Alt+B (Windows/Linux), we can navigate to an implementation instead. Pressing it on a class name will take us to the class file. For example, pressing this on a field will take the cursor to the field declaration. With ⌘B (MacOS), or Ctrl+B (Windows/Linux) we can go to the declaration of a symbol. We often want to navigate the code from within the code. Like any window in IntelliJ IDEA we can search for something specific in here by typing.
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We can also open tool windows from here, including ones that don’t have keyboard shortcuts. This pops up the recent files box which you can navigate using arrow keys. We can view the most recently opened files using ⌘E (MacOS) or Ctrl+E (Windows/Linux). The project window may not be the best way to navigate to the file we want. See Editor Basics for more tips on navigating to and from the editor. In fact, escape is useful for closing any popup without applying changes. Whatever tool window is open, this will put you back in the editor so you can carrying on working with the code. To put the focus back on the editor, press escape. You can navigate the tree using the arrow keys and search by typing. ⌘1 (MacOS) or Alt+1 (Windows/Linux) opens the project window and puts the focus in there. We don’t need the mouse to open tool windows either. Combine this with either Alt+Enter, to see all suggestions and pick one, or Shift+Alt+Enter to apply the first suggestion. We don’t want to use the mouse when navigating between errors and warnings in the editor, so use F2 to jump to the next error, warning or suggestion. We can even use Alt+Enter on code that doesn’t have an error, warning or suggestion: it will show us Intention Actions (one of my personal favourites is to add static imports) and Inspections that are enabled but not set to warn us. We can also use Alt and Enter where we see warnings and suggestions and we can choose to accept one of these suggestions. When we see an error in our code, if we place the cursor on the error and press Alt+Enter we get a list of suggested fixes for the problem. This keyboard shortcut can be used to fix just about anything by showing us actions for the current context. There’s a video of all these shortcuts in action on the IntelliJ IDEA YouTube channel. Learning and practicing these shortcuts so they get loaded into our muscle memory can help us to stay in the state of flow. IntelliJ IDEA has keyboard shortcuts for most of its commands related to editing, navigation, refactoring, debugging, and pretty much everything else we might want to do regularly.
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