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collections

 
Santosh Kumar Nayak
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What is the meaning of the Collection<? extends String> my_plan

Can some one explain me the above syntax.
 
Jesper de Jong
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That's generics with wildcards. See this tutorial: Generics - Wildcards.
 
Tony Docherty
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That use of an upper bounded wildcard is actually pointless as the String class is final and so there are no subclasses of String.
 
It is sorta covered in the JavaRanch Style Guide.
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