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Failed communicate with MYSQL Database

 
gah hon
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SQLException: Communications link failure

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
SQLState: 08S01
VendorError: 0
java.lang.NullPointerException


The statement from the above is the error I got after I executed my program.
I am using MYSQL Workbench to connect RDS Amazon.
I had create one new database named ("kwongDB"), connection named ("COS80001"), in my MYSQL Workbench.


 
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