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arada theera
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I try to launch crytal report viewer ,it's display correctly but when I press print button.It display error on my error page :java.lang.NullPointerException

then I try again by change a little bit code and It works !

Different between first and second is
first receive value of parameter field ( of cyrstal report ) from previous.
For second I fix values for parameter field.

Who can help me,now I so wonder ?
Thanks for coming help.
 
It is sorta covered in the JavaRanch Style Guide.
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