IntelliJ IDEA has a rich set of keyboard shortcuts to use, but you can also create your own.

To add a custom shortcut, open Settings | Keymap and search for the action you want to add a shortcut to. Right-click this action and from the context menu, select Add Keyboard Shortcut. In the Keyboard Shortcut popup, add the shortcut you want to assign to this action.

To add an abbreviation, Open Settings | Keymap and search for the term you want to add an abbreviation to. Right-click this term and from the context menu, select Add Abbreviation. In the Abbreviation popup, add the abbreviation you want to assign to this action.