For interfaces with one implementation how can I just directly go to that implementation?

user_124696 0
Viewed 35276

I often have to debug Java code which was written so that there is an interface and exactly one implementation of that interface.

For instance there would be an interface Foo with exactly one implementation called FooImpl. In the following code if I Ctrl-click on doThings it'll jump to Foo.java when I actually want to go to FooImpl.java to see the implementation.

public void doStuff(Foo foo) {
    foo.doThings();
}

When I end up at the interface I have to use Ctrl-Shift-R to open up FooImpl. It'd be really nice if I could do something lick Ctrl-Alt-click on doThings and end up inside FooImpl.java. If there are multiple implementations in the workspace then perhaps it would just pop up a box telling me what they are.

Is there a plugin or existing function in eclipse that does this? I know that I could go to Foo.java and then get the hierarchy and go to the implementation, but that's more clicks than are necessary when there is exactly one implementation of an interface.

keyboard-shortcuts eclipse java
5 Answers
  1. Move the cursor to the method call
  2. Press Ctrl + T
  3. Select your desired implementation
  4. Hit Enter

This also works if there are several implementors.

user_1834060

In Eclipse 3.5, when you hover over doThings while holding down the control key, a pop up box gives you two options to click on:

  • Open Declaration
  • Open Implementation

There's a screenshot as the second section of the Eclipse 3.5 New & Noteworthy page for JDT:

alt text

spdenne_117210

The Implementors plugin does pretty much exactly what you ask for. If there is only one implementation it will open it directly, otherwise it will let you choose.

user_193920

In Eclipse IDE for C/C++ Developers Version: Oxygen.3a Release (4.7.3a) I saw Ctrl+Tab (Toggle Source/Header) which worked for me (although not directly but its a workaround).

Toggle Source/Header

user_24646620
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