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Detecting 2 periods in 1 String  RSS feed

 
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Hello,

My JTable contains the contents of a user's hard drive with one column displaying a short file extension type description.
My method that searches the Hashtable for the file extension and retrieves the description determines the file extension by the indexOf() method like so:



there are instances however where there are 2 periods in the file name including before the file extension so the indexOf() method naturally stops at the first period. Example: intel.com.DAT

in the above example my method fails to detect .DAT as the file extension.

Is there a way to detect if there are 2 or more periods in a String.

Thanks.
 
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Why can't you use the lastIndexOf() method instead of the indexOf() method?

Henry
 
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Produces
 
Isaac Hewitt
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thank you so much Tim
 
Isaac Hewitt
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and Henry too
 
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