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collections

Santosh Kumar Nayak
Ranch Hand

Joined: Aug 02, 2011
Posts: 136
What is the meaning of the Collection<? extends String> my_plan

Can some one explain me the above syntax.
Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14809
    
  26

That's generics with wildcards. See this tutorial: Generics - Wildcards.


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Tony Docherty
Bartender

Joined: Aug 07, 2007
Posts: 2681
    
  56
That use of an upper bounded wildcard is actually pointless as the String class is final and so there are no subclasses of String.
 
 
subject: collections