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F3 is the typical "go to implementation". For interfaces that go to the interface definition. Instead use Ctrl + T to see all implementations of the interface definition. You can then easily go to the one you want with the arrow keys and Enter.
We can access it in two ways: Using the keyboard shortcut, which is Ctrl + Shift + R on a PC or Cmd + Shift + R on a Mac. Opening the menu under Navigate > Open Resource.
The project might be compiling fine, but eclipse may not be displaying the files and folders correctly and thus the editor is unable to determine the link when you press CTRL-click. So verify your eclipse settings and make sure that all source folders are declared as "source folders" and are added to the build path.
You can open any method or type in your workspace using the "Open Type" wizard or the "Open Method" wizard. -Or- press Ctrl+Shift+T (for a type) or Ctrl+Shift+M (for a method). The "Open Type/Method" dialog will appear. If a type/method was previously selected in the editor or outline views, it will be displayed.
Here's what I do:
The procedure isn't very quick, but it gives you a good overview.
Well... well... I hope you use Eclipse Helios, because what you asked is available on Helios.
Put your text cursor again on the method and click menu Navigate → Open Implementation. Now if you have more than one implementation of the method, you will get choice to pick which implementation to open.
By defining a keybinding on Preferences → General → Keys you can even use the feature easier, but before you do that, see if this shortcut is fast enough for you.
Press Ctrl + click and hold. Now move your mouse over the same method. Tadam… you will get choice.
If you pick Open Implementation you’ll get the same choice as before.
Press Ctrl + T on the method name (rather than F3). This gives the type hierarchy as a pop-up so is slightly faster than using F4 and the type hierarchy view.
Also, when done on a method, subtypes that don't implement/override the method will be greyed out, and when you double click on a class in the list it will take you straight to the method in that class.
There's a big productivity boost if you add an Alt + F3 key binding to the Open Implementation feature, and just use F3 to go to interfaces, and Alt + F3 to go to implementations.
Highlight an interface and use Ctrl+T to open "Quick Type Hierarchy".
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