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joptionpanel won't show  RSS feed

 
david luis
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Hi,
I have a button in a jframe that call to other method class and check some things and show a Joptionpanel. To make these I pass the jframe value to the method but doesn't show anything.
Could you help me please?



 
K. Tsang
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Does "estaVacio(rs)" return true?
 
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