Rich OO hierarchies
Smalltalk-80, Java JDK, …
class java.awt.
Component
(implements java.awt.image.
ImageObserver
, java.awt.
MenuContainer
, java.io.
Serializable
)
class java.awt.
Button
class java.awt.
Canvas
class java.awt.
Checkbox
(implements java.awt.
ItemSelectable
)
class java.awt.
Choice
(implements java.awt.
ItemSelectable
)
class java.awt.
Container
class java.awt.
Panel
class java.applet.
Applet
class java.awt.
ScrollPane
class java.awt.
Window
class java.awt.
Dialog
class java.awt.
FileDialog
Magnitude
Association
Character
Date
Number
Float
Fraction
Integer
LargeNegativeInteger
LargePositiveInteger
SmallInteger
Time
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