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NullpointerException while inserting  RSS feed

 
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Hey !! i have a frame and when i'm inserting the data i.e when after filling the details when i click on "submit" button i'm getting a NullPointerException.
Please help me..


 
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So which object is null? The exception stack trace should point you to the line of code where that happens - you should put "ee.printStackTrace()" into your catch block so that you get useful information.

I would also strongly urge not to use the JDBC/ODBC bridge -you know that has been removed from Java 8, right?- and instead to use a proper DB.
 
arjun gaur
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This is the stacktrace,can you figure out what is the problem ??

D:\m28>java Modify_appointment
error java.sql.SQLException: General error
java.sql.SQLException: General error
at sun.jdbc.odbc.JdbcOdbc.createSQLException(JdbcOdbc.java:6993)
at sun.jdbc.odbc.JdbcOdbc.standardError(JdbcOdbc.java:7121)
at sun.jdbc.odbc.JdbcOdbc.SQLExecute(JdbcOdbc.java:3156)
at sun.jdbc.odbc.JdbcOdbcPreparedStatement.execute(JdbcOdbcPreparedState
ment.java:215)
at sun.jdbc.odbc.JdbcOdbcPreparedStatement.executeUpdate(JdbcOdbcPrepare
dStatement.java:137)
at Modify_appointment.actionPerformed(Modify_appointment.java:188)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:20
18)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.jav
a:2341)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel
.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259
)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonL
istener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6505)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3320)
at java.awt.Component.processEvent(Component.java:6270)
at java.awt.Container.processEvent(Container.java:2229)
at java.awt.Component.dispatchEventImpl(Component.java:4861)
at java.awt.Container.dispatchEventImpl(Container.java:2287)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4832
)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4492)

at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4422)
at java.awt.Container.dispatchEventImpl(Container.java:2273)
at java.awt.Window.dispatchEventImpl(Window.java:2719)
at java.awt.Component.dispatchEvent(Component.java:4687)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:735)
at java.awt.EventQueue.access$200(EventQueue.java:103)
at java.awt.EventQueue$3.run(EventQueue.java:694)
at java.awt.EventQueue$3.run(EventQueue.java:692)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:87)
at java.awt.EventQueue$4.run(EventQueue.java:708)
at java.awt.EventQueue$4.run(EventQueue.java:706)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDo
main.java:76)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:705)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThre
ad.java:242)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.
java:161)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:146)

at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:138)

at java.awt.EventDispatchThread.run(EventDispatchThread.java:91)
 
arjun gaur
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Sorry for the above post.Posted at the wrong place..
 
Ulf Dittmer
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Let's continue the discussion in this duplicate thread.
 
It is sorta covered in the JavaRanch Style Guide.
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