How do I create a new class in IntelliJ without using the mouse?

With Esc and Command + 1 you can navigate between project view and editor area - back and forward, in this way you can select the folder/location you need

With Control +Option + N you can trigger New file menu and select whatever you need, class, interface, file, etc. This works in editor as well in project view and it relates to the current selected location

// please consider that this is working with standard key mapping

If you are already in the Project View, press Alt+Insert (New) | Class. Project View can be activated via Alt+1.

To create a new class in the same directory as the current one use Ctrl+Alt+Insert (New...).

You can also do it from the Navigation Bar, press Alt+Home, then choose package with arrow keys, then press Alt+Insert.

Another useful shortcut is View | Select In (Alt+F1), Project (1), then Alt+Insert to create a class near the existing one or use arrow keys to navigate through the packages.

And yet another way is to just type the class name in the existing code where you want to use it, IDEA will highlight it in red as it doesn't exist yet, then press Alt+Enter for the Intention Actions pop-up, choose Create Class.

For Mac Os, command + 1 , then press control + return

You can also use: ctrl+alt+insert