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If I'm in an interface and pointing to a method name, what can I do to quickly go to the ONLY implementation of that method?

Using Eclipse 3.6.

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4 Answers 4

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129

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. I believe that the first one is automatically selected so that Ctrl-T + Enter will do what you need.

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    Ctrl-T + Enter doesn't work in my case. The default focus is the filter text box. Thus, this combined keys just opens the interface.
    – Loc Phan
    Commented May 26, 2016 at 2:20
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    @TheSea Ctrl-T + Arrow down + Enter perhaps then?
    – Thorbjørn Ravn Andersen
    Commented Jan 12, 2017 at 11:40
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    Yes. However, Arrow down + Enter is pretty expensive when we are reading code. Especially, after pressing Ctrl + T, Eclipse search all the implementations in the workspace which causes some unpredictable delay :)
    – Loc Phan
    Commented Jan 13, 2017 at 3:12
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    @TheSea I have since switched to IntelliJ which does this much much better.
    – Thorbjørn Ravn Andersen
    Commented Jan 13, 2017 at 6:55
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I just checked this on my Eclipse 3.6 install: Hold control (command on Mac), hover over the method name and select "Open Implementation".

You may assign a keyboard shortcut to this action by using Window > Preferences > General > Keys and searching for "Open Implementation".

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    You might also want to change that key binding's scope ('When') to 'Editing Java Source` or something.
    – J. Katzwinkel
    Commented Aug 1, 2017 at 15:44
  • This works perfectly fine unless u have to be switching between machines that are used by several users...RIP no mouse users...
    – dbl
    Commented Jul 21, 2020 at 12:50
  • this will save me a lot of clicks ! thanks for sharing !
    – mounaim
    Commented May 27, 2022 at 13:53
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In the keymap (General > Keys) search for "open implementation" and map it to whatever you want. I chose Ctrl + Shift + I. Make sure you select "Editing Java Source" in the When box. I tested it, and having the cursor over the method name and pressing Ctrl + Shift + I took me directly to the implementation instead of showing the hierarchy that you get with Ctrl + T.

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Also you can see an answer to a nearly identical question for other options:

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    Note that we can actually keep the original F3 key rather than having to invent some extra nonstandard key: if we assign F3 to "Open implementation" with "When = Editing Java Source", there is no conflict with the original F3 "Open declaration" with "When = In Windows"
    – Johan Boulé
    Commented Feb 5, 2019 at 15:53
  • Further note: "Ctrl + Shift + I" is already taken by the debugger's Inspect expression command.
    – Johan Boulé
    Commented Feb 5, 2019 at 16:25
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If someone still need this information nowadays (Eclipse version 2022), to jump into interface method definition starting from an @Override method, now in Eclipse you can see on the left, next to the method signature, a little white triangle. By clicking on that you will jump to the implemented interface method. here an image of the little triangle

Oterwise, if you are on a interface method definition and you need to jump to one of the implementations, you must use CTRL+T shortcut to see the list of available implementations and than click on one of them.

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