Finding overridden methods
You can discover which methods override a selected method.
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Open the type hierarchy for the selected method's declaring type. Toggle on the Show the Subtype Hierarchy toolbar button.
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In the list pane of the Hierarchy view, make sure that the Lock View and Show Members in Hierarchy button is toggled on. This option
locks the current class in the method pane and shows only those classes in the upper view that implement the currently selected method of the locked class.
The methods of interest are shown in the upper pane. You can select any method and open it in an editor.
Note: The selection might not show all members if a filter (such as Hide Fields or Hide Static Members) is active.

Java development tools (JDT)
Using the Hierarchy view
Filtering elements
Opening an editor for a selected element
Opening a type hierarchy on a Java element
Override methods
Type Hierarchy view