Is there some shortcut that would allow me after creating method in an interface, select and jump to implementing class of that interface?
Yes.... in mac, it is Apple + ALT + B. You will need to move your cursor to the interface name before invoking the shortcut. I'm not sure what's the shortcut in PC, for if you right click the interface name -> "Go To" -> "Implementations"... the shortcut is listed there.
In PC, it is CTRL + ALT + B: JetBrains navigation documentation.
In addition to Ctrl + Alt + B mentioned above, you can also use the mouse: Ctrl + Alt + LeftMouseButton to jump directly to implementations.
If you did Alt + Mouse click on method method you want to navigate to You will be navigated to interface (Declaration)
but If you did Alt + Ctrl + Mouse click on method method you want to navigate to You will be navigated to class (Implementation)
On OSX you can jump to the implementation with your mouse by using Alt + Command + Mouse. (comparable with Ctrl + mouse in Eclipse)
If you do not know the shortcut for a specific IntelliJ Command, press Ctrl + Alt + A (or Apple + Alt + A on Mac). That will open a pop-up that allows you to search for all shortcuts. Alternatively, you can access it using the Find Action... from the Help menu.
Moreover, there is the Default Keymap Reference also available from the Help menu (that among other shortcuts contains the shortcut to the Find Action... described above).
Lastly, you can configure your own keyboard shortcuts (and see the current settings) in the Preferences -> Keymap setting.
On MacOs: cmd + (option) + B
来源：https://stackoverflow.com/questions/5051766/intellij-idea-jump-from-interface-to-implementing-class-in-java