Hierarchy view
We use the Hierarchy view to display the type hierarchy of a selected type.
To view the hierarchy of a class type, select the class in the Package Explorer, and press F4 or right-click the class and select Open Type Hierarchy. The hierarchy of the selected class is displayed, as shown in Figure | -3.
Figure 8-3 Hierarchy view for a selected class
The Hierarchy view provides three kinds of hierarchy layouts:
|  Type Hierarchy: All supertypes and subtypes of the selected type are shown.
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|  Supertype Hierarchy: Only all supertypes of the selected type are shown.
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|  Subtype Hierarchy: Only all subtypes of the selected type are shown.
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Other options in the Hierarchy view:
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|  Locks the view and shows members in hierarchy. For example, use this option if you are interested in all types implementing the toString() method.
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|  Shows all inherited members.
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|  Sorts members by their defining types. Defining type is displayed before the member name.
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|    Filters the displayed members.
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