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JavaRanch » Java Forums » Certification » Programmer Certification (SCJP/OCPJP)
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kranthi kumar
Greenhorn

Joined: Nov 04, 2008
Posts: 13
hi every one
can any one tell me what does <? mean in java



thaks in advance


regards
kranthi.
Ankit Garg
Sheriff

Joined: Aug 03, 2008
Posts: 9293
    
  17

Hi Kranthi! welcome to javaranch.

First of all you must change your name as your first name and last name are the same. Please use your actual name..

Secondly I think you are trying to ask about the generic declaration like this

<? extends Number> or <? super Integer>

It is a wildcard generic declaration. I think you must read a tutorial or book to be familiar with it...


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Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14114
    
  16

kranthi kranthi, please check your private messages. You can see them by clicking My Private Messages.

When you post a question on JavaRanch, please use a meaningful subject line instead of something like "java".
[ November 05, 2008: Message edited by: Jesper Young ]

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kranthi kumar
Greenhorn

Joined: Nov 04, 2008
Posts: 13
hi ankith
the display name was a type mismatch and i have corrected it and comming to my question i have asked what ineed is does <? mean the same as inn jsp or it mean differntly.


thanks a lot
regards
kranthi.
Jesper de Jong
Java Cowboy
Saloon Keeper

Joined: Aug 16, 2005
Posts: 14114
    
  16

As Henry Wong already told you, your new name unfortunately still does not conform to the naming policy. Your display name should consist of a first and a second name - not just one name. Please change your name again.

<? does not mean the same in Java as in a JSP. Ankit Garg already answered your question above.
[ November 12, 2008: Message edited by: Jesper Young ]
 
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subject: java