File APIs for Java Developers
Manipulate DOC, XLS, PPT, PDF and many others from your application.
http://aspose.com/file-tools
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Generics wildcards

 
maggie karve
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Neha Daga
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you are adding a String to the collection that can take only Number and its subtypes.
 
maggie karve
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ya thanks
 
I agree. Here's the link: http://aspose.com/file-tools
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