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  Tutorial: hi, Everyone ,i'm learning jdbc, i got an nullpointerexception when execute this program.

hi, Everyone ,i'm learning jdbc, i got an nullpointerexception when execute this program.


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hi, Everyone ,i'm learning jdbc, i got an nullpointerexception when execute this program.

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hi, Everyone ,i'm learning jdbc, i got an nullpointerexception when execute this program.

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