When I want to find usages of a normal method in java it is fairly easy and straightforward CTRL-SHIFT-G .
However if this method has a super d
Alt + ctrl + h
should give you exactly, what you are looking for.
Updated with screenshot from my workspace as some people are facing issue in following it:
After having the same problem as many others in the comments (Eclipse shows references to Object.toString()) I have found a way that seems to work correctly:
Go to outline from your custom class, right click on your toString() implementation and References -> Project. This displays only references to said implementation.
Thanks to @manouti answer, To show when using the overridden method only follow the steps:
Search by Java the method as com.package.MyObject.toString()
And after in search result screen click on the right arrow to the left and check References to Overridden