java hashmap flaws ?

Posted by Tiberiu Hajas on Stack Overflow See other posts from Stack Overflow or by Tiberiu Hajas
Published on 2010-03-16T21:16:47Z Indexed on 2010/03/16 21:21 UTC
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java

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hashmap

hi there,

  if (agents != null)
         for (Iterator iter = agents.keySet().iterator(); iter .hasNext();)
         {
           // some stuffs here
         }

I have the following piece of java code, the agents is a hashmap, wondering if anyone can figure it out why on the line with "for" statement sometimes I got NPE ? is there any flaw with hashmaps ? thanks

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