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Abstract class in the Java API

 
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Hello

I wonder if there are any abstract classes in the Java API ? I have not encountered with one till now but would like to know if there are any.
All your expert comments would help increase my/everyone's knowledge.
Thank you.
 
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Look at Calendar, Graphics, for a start.

There are actually lots of abstract classes in the API. Some of them have names starting with Abstract, some others have names ending in Adapter.
 
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java.lang.Number
 
sudipto shekhar
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Thanks Campbell and Ankit, thank you very much.
 
Campbell Ritchie
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You're welcome
 
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