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| • |
If the
implementation is identical except for the basic type,
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then Object type is used to get generic
implementations.
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| • |
This is
the equivalent of “template” in C++; every reference
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type is
compatible with the Object type.
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| • |
When
specific methods of the object are needed, then we
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need
to“downcast” to the correct type.
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If a
class does not extend another class, it extends the
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class Object. It is class (not abstract) with
several methods
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including
toString().
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If a
method required is not available in Object, then generic
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implementations
can be achieved using interface.
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