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To understand what you see in the class-hierarchy browser, you need to know how the class hierarchy is displayed.
First, note that every class in Smalltalk is a subclass of some other
class, except for the class named Object. Thus, the classes in
Smalltalk form an treelike, hierarchical structure, rooted in the
Object class. The following shows a small portion of the
class hierarchy:
Object
|
*-*------------*--
| |
| |
Collection Magnitude
| |
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*-*-----*-- *-*--------*---------*--
| | | | |
| | | | |
Bag Set Number Date Time
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*-*-------*---------*--
| | |
| | |
Float Fraction Integer
Now, think of turning the class-hierarchy diagram on its side:
Object
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*-- Collection
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| *-*-- Bag
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| *-- Set
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*-- Magnitude
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*-*-- Number
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| *-*-- Float
| |
| *-- Fraction
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| *-- Integer
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*-- Date
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*-- Time
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Then, think of deleting all empty lines and indenting classes on each level by just one space per level:
Object Collection Bag Set ... Magnitude Number Float Fraction Integer ... Date Time ... ...