1.
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In the Package Explorer view, find junit.framework.TestCase.java.
From its context menu, select Open Type Hierarchy.
You can also open type hierarchy view:
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2.
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In the Hierarchy view, click the Show
the Type Hierarchy button to see the class hierarchy, including
the base classes and subclasses.
The small arrow on the left side of the type icon of TestCase indicates that the hierarchy was opened on this type. ![]() |
3.
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Click the Show the Supertype
Hierarchy button to see a hierarchy showing the type's parent elements
including implemented interfaces, i.e., the results of going up the
type hierarchy.
![]() In this "reversed hierarchy" view, you can see that TestCase
implements the Test interface.
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4.
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Click the Show the Subtype Hierarchy
button in the view toolbar.
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5.
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Click the Lock View and Show
Members in Hierarchy button in the toolbar of the member pane, then
select the runTest() method in the member pane.
The view will now show all the types implementing runTest().
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6.
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In the Hierarchy view, click the Show
the Supertype Hierarchy button. Then on the member pane, select
countTestCases() to display the places where this method
is overridden.![]() |
7.
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In the Hierarchy view select the Test element and select Focus
On 'Test' from its context menu.
The resource containing the selected element is represented
in the Hierarchy view and also opens in an active editor.
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8. |
Activate the Package Explorer view and select the package
junit.framework. Use Open Type Hierarchy
from its context menu.
A hierarchy is opened containing all classes of the package.
For completion of the tree, the hierarchy also shows some classes from
other packages. These types are shown by a type icon with a white fill.
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9. | Use Previous Hierarchy Inputs to go
back to a previously opened element. Click on the arrow next to the button
to see a menu or click on the button to edit the history list.
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10.
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From the menu bar, select Window
> Preferences. Go to Java and select Open
a new Type Hierarchy Perspective. Then click OK.
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11.
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In the Hierarchy view, select the Test element again,
and activate Open Type Hierarchy from the
Navigate menu bar.
The resource containing the selected type is shown in
a new perspective (the Hierarchy perspective), and its source is shown
in the Java editor.
By setting the preference option for viewing type hierarchy perspectives,
you can have more than one type hierarchy in your workbench and switch
between them as needed.
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