CODEWITHSUNDEEP
eclipseinterfacepolymorphism
aeq
aeq

Reputation: 10567

Jump into interface implementation in Eclipse IDE

You know how in Eclipse, pressing F3 over a method will take you to its declaration? Well I have a method that is part of an interface; clicking F3 over this naturally takes me to the declaring interface.

Obviously there is an object implementing this interface and this is where the method is actually implemented. I want, when I press F3, to jump to the implementation, not the interface declaration. I know that the implementation may not be known at compile-time, so is there a way for Eclipse to show me all the classes implementing the interface so that I can select which implemented method to view? Right now when this happens I am just manually searching for this to find the implemented method.

Upvotes: 148

Views: 137749

Answers (12)

Ralph W
Ralph W

Reputation: 33

Just hold control and hover over interface or method name. A little dialog will pop up, then click 'Open Implementation'.

Upvotes: 0

nanda
nanda

Reputation: 24808

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.

alt text

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.

alt text

If you pick Open Implementation you’ll get the same choice as before.

Upvotes: 133

tbraun
tbraun

Reputation: 2666

ctrl + mouse hover + click "Open Implementation"

On ctrl + hover, you should see the following menu:

enter image description here

Tested on Eclipse Mars.2 (4.5.2)

Upvotes: 16

supernova
supernova

Reputation: 3271

I always use this implementors plugin to find all the implementation of an Interface

http://eclipse-tools.sourceforge.net/updates/

it's my favorite and the best

Upvotes: 2

computingfreak
computingfreak

Reputation: 5129

The best solution would be Ctrl+Alt+I.

Upvotes: -1

Mangusta
Mangusta

Reputation: 473

Here is what I do:

I press command (on Mac, probably control on PC) and then hover over the method or class. When you do this a popup window will appear with the choices "Open Declaration", "Open Implementation", "Open Return Type". You can then click on what you want and Eclipse brings you right there. I believe this works for version 3.6 and up.

It is just as quick as IntelliJ I think.

Upvotes: 3

Jonathan
Jonathan

Reputation: 3263

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.

Upvotes: 81

Roland
Roland

Reputation: 1119

Highlight an interface and use Ctrl+T to open "Quick Type Hierarchy".

Upvotes: 15

Lukasz Frankowski
Lukasz Frankowski

Reputation: 3175

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.

Open implementation keybinding

Upvotes: 56

Chris Lercher
Chris Lercher

Reputation: 37798

Here's what I do:

  • In the interface, move the cursor to the method name. Press F4. => Type Hierarchy view appears
  • In the lower part of the view, the method should already be selected. In its toolbar, click "Lock view and show members in hierarchy" (should be the leftmost toolbar icon).
  • In the upper part of the view, you can browse through all implementations of the method.

The procedure isn't very quick, but it gives you a good overview.

Upvotes: 142

zvikico
zvikico

Reputation: 9825

If you are really looking to speed your code navigation, you might want to take a look at nWire for Java. It is a code exploration plugin for Eclipse. You can instantly see all the related artifacts. So, in that case, you will focus on the method call and instantly see all possible implementations, declarations, invocations, etc.

Upvotes: 0

mahju
mahju

Reputation: 1156

See In eclipse, ctrl-click goes to the declaration of the method I clicked. For interfaces with one implementation, how can I just directly to that implementation? for some alternative solutions.

  • Anyway, I think you might be looking for something like this:

http://eclipse-tools.sourceforge.net/implementors/

Upvotes: 2

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