Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException

[dilshod]

Help, please! Following errors are written To mine to the program.

Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
at com.mysql.jdbc.UpdatableResultSet.syncUpdate(Updat ableResultSet.java:1548)
at com.mysql.jdbc.UpdatableResultSet.updateString(Upd atableResultSet.java:2493)
at newpackage.forma_registratsiya.jButton1ActionPerfo rmed(forma_registratsiya.java:133)
at newpackage.forma_registratsiya.access$000(forma_re gistratsiya.java:22)
at newpackage.forma_registratsiya$1.actionPerformed(f orma_registratsiya.java:55)
at javax.swing.AbstractButton.fireActionPerformed(Abs tractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed (AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed (DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultB uttonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseRe leased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.jav a:6267)
at javax.swing.JComponent.processMouseEvent(JComponen t.java:3267)
at java.awt.Component.processEvent(Component.java:603 2)
at java.awt.Container.processEvent(Container.java:204 1)
at java.awt.Component.dispatchEventImpl(Component.jav a:4630)
at java.awt.Container.dispatchEventImpl(Container.jav a:2099)
at java.awt.Component.dispatchEvent(Component.java:44 60)
at java.awt.LightweightDispatcher.retargetMouseEvent( Container.java:4577)
at java.awt.LightweightDispatcher.processMouseEvent(C ontainer.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Conta iner.java:4168)
at java.awt.Container.dispatchEventImpl(Container.jav a:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2478 )
at java.awt.Component.dispatchEvent(Component.java:44 60)
at java.awt.EventQueue.dispatchEvent(EventQueue.java: 599)
at java.awt.EventDispatchThread.pumpOneEventForFilter s(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(E ventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarch y(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispa tchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThre ad.java:122)

Program code:

try { 
	           Class.forName("com.mysql.jdbc.Driver"); 
	           conn = DriverManager.getConnection("jdbc:mysql://localhost/baza_zapis","root",""); 
	           Statement sely = conn.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE); 
	           resultup = sely.executeQuery("select * from tablitsa_zapis"); 
	             
	         resultup.updateString(2, jTextField1.getText()); 
	         resultup.updateString(3,jTextField2.getText()); 
	         resultup.updateString(4, jTextField4.getText()); 
	         resultup.updateString(5, jTextField3.getText()); 
	         resultup.insertRow(); 
	      
	             } catch (SQLException ex) { 
	           Logger.getLogger(forma_registratsiya.class.getName()).log(Level.SEVERE, null, ex); 
	       } catch (ClassNotFoundException ex) { 
	           try { 
	               Logger.getLogger(forma_registratsiya.class.getName()).log(Level.SEVERE, null, ex); 
	               resultup.insertRow(); 
	         
	         
	         
	   }                                         
	           catch (SQLException ex1) { 
	               Logger.getLogger(forma_registratsiya.class.getName()).log(Level.SEVERE, null, ex1); 
	           }  }

[Fubarable]

Based on this message:

at newpackage.forma_registratsiya.jButton1ActionPerformed(forma_registratsiya.java:133)

which line of code is line 133 of forma_registratsiya.java?

[dilshod]

this:

resultup.updateString(4, jTextField4.getText());

[Fubarable]

Well that tells you that either resultup or jTextField4 is null. Now your job is to first figure out which -- some println statements above the offending line of code shown above can help you with this, and then to look back into your code and figure out why it's null.

[dilshod]

I have checked up result up and jTextField. Resultup yields result and from jTextField1 to jTextField4 I entered the text. After a line

 resultup.updateString (2, jTextField1.getText ());

The same error gives out. Help, please, will solve these errors?

[Tolls]

Shouldn't the resultSet actually be pointing at a row to do the updates?
Because you haven't called next() yet...

Also, why are you doing a set of updates on an essentially random row?