Help please I get Null Pointer Exception with my SQL query

The following statement gives me a null pointer exception when executed
from the doPost of my servlet.
rs=stmt.executeQuery(sqlQuery);
The error message reads:
java.lang.NullPointerException
at stockserv.Servlet1.doPost(Servlet1.java:142)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:760)
===etc.
when I execute the same statement and query (same DB and table) from a standard java
program I do not get the error and get the propper result.
Any obvious thing I should check?
Thanks

Yes line 142 is as follows
rs=stmt.executeQuery(sqlQuery);
I also tried it with the folowing literal statement and get the same error.
rs=stmt.executeQuery("select * from table1 Where symbol= 'brt' ");
Does null pointer mean I am sending a null query or something else?
Again this same statment works from a regular java (non-server)program.
Thanks Again

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 at com.sap.engine.services.rmi_p4.DispatchImpl._run(DispatchImpl.java:183)
 at com.sap.engine.services.rmi_p4.server.P4SessionProcessor.request(P4SessionProcessor.java:119)
 at com.sap.engine.core.service630.context.cluster.session.ApplicationSessionMessageListener.process(ApplicationSessionMessageListener.java:37)
 at com.sap.engine.core.cluster.impl6.session.UnorderedChannel$MessageRunner.run(UnorderedChannel.java:71)
 at com.sap.engine.core.thread.impl3.ActionObject.run(ActionObject.java:37)
 at java.security.AccessController.doPrivileged1(Native Method)
 at java.security.AccessController.doPrivileged(AccessController.java(Compiled Code))
 at com.sap.engine.core.thread.impl3.SingleThread.execute(SingleThread.java(Compiled Code))
 at com.sap.engine.core.thread.impl3.SingleThread.run(SingleThread.java(Compiled Code))
#5 09:30:35 [AWT-EventQueue-0] FINE AutoLog.created.com.sap.aii.utilxi.misc.api.BaseRuntimeException: com.sap.aii.utilxi.misc.api.BaseRuntimeException: Invalid key element attribute id "NAMESPACE". Valid values are: {SWC_VENDOR,SWC_NAME,SWC_VERSION,SWC_ELTYPEID}.
 at com.sap.aii.ib.bom.gen.XiTypeInformation.validateKeyElementAttributeId(XiTypeInformation.java:890)
 at com.sap.aii.ib.bom.gen.XiTypeInformation.getKeyElementIndex(XiTypeInformation.java:905)
 at com.sap.aii.ib.bom.gen.XiKey.getPosition(XiKey.java:169)
 at com.sap.aii.ib.bom.gen.XiKey.getKeyfield(XiKey.java:162)
 at com.sap.aii.ib.bom.gen.XiKey.getNamespace(XiKey.java:157)
 at com.sap.aii.ib.gui.operations.SubmitSubsetDialog.<init>(SubmitSubsetDialog.java:74)
 at com.sap.aii.ib.gui.operations.SubmitSubsetCommand.execute(SubmitSubsetCommand.java:104)
 at com.sap.aii.utilxi.swing.framework.ExecutionContext.execute(ExecutionContext.java:196)
 at com.sap.aii.utilxi.swing.framework.ExecutionContext.executeSafe(ExecutionContext.java:134)
 at com.sap.aii.utilxi.swing.framework.CommandAction.actionPerformed(CommandAction.java:69)
 at javax.swing.AbstractButton.fireActionPerformed(Unknown Source)
 at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(Unknown Source)
 at javax.swing.DefaultButtonModel.fireActionPerformed(Unknown Source)
 at javax.swing.DefaultButtonModel.setPressed(Unknown Source)
 at javax.swing.AbstractButton.doClick(Unknown Source)
 at com.sap.plaf.frog.FrogMenuItemUI$MouseInputHandler.mouseReleased(FrogMenuItemUI.java:833)
 at java.awt.Component.processMouseEvent(Unknown Source)
 at java.awt.Component.processEvent(Unknown Source)
 at java.awt.Container.processEvent(Unknown Source)
 at java.awt.Component.dispatchEventImpl(Unknown Source)
 at java.awt.Container.dispatchEventImpl(Unknown Source)
 at java.awt.Component.dispatchEvent(Unknown Source)
 at java.awt.LightweightDispatcher.retargetMouseEvent(Unknown Source)
 at java.awt.LightweightDispatcher.processMouseEvent(Unknown Source)
 at java.awt.LightweightDispatcher.dispatchEvent(Unknown Source)
 at java.awt.Container.dispatchEventImpl(Unknown Source)
 at java.awt.Window.dispatchEventImpl(Unknown Source)
 at java.awt.Component.dispatchEvent(Unknown Source)
 at java.awt.EventQueue.dispatchEvent(Unknown Source)
 at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.run(Unknown Source)
#4 09:30:35 [AWT-EventQueue-0] DEBUG AutoLog.created.com.sap.aii.utilxi.misc.api.BaseRuntimeException: Invalid key element attribute id "NAMESPACE". Valid values are: {SWC_VENDOR,SWC_NAME,SWC_VERSION,SWC_ELTYPEID}.
#3 09:29:40 [AWT-EventQueue-0] FINE AutoLog.created.com.sap.aii.ib.core.service.TypeNotRegisteredException: com.sap.aii.ib.core.service.TypeNotRegisteredException: Type "TypeConntestObj" is not registered in the service class Type Service - Type Information
 at com.sap.aii.ib.core.service.ServiceBase.getServiceImpl(ServiceBase.java:71)
 at com.sap.aii.ib.bom.gen.TypeServiceImpl.getTypeInformation(TypeServiceImpl.java:82)
 at com.sap.aii.ib.gui.xiitem.services.InternalXiItemService.getTypeInfo(InternalXiItemService.java:23)
 at com.sap.aii.ib.gui.xiitem.services.InternalXiItemService.createEmptyXiItem(InternalXiItemService.java:92)
 at com.sap.aii.ib.gui.xiitem.services.XiItemServiceProvider.createEmptyXiItem(XiItemServiceProvider.java:97)
 at com.sap.aii.ib.gui.xiitem.InternalXiItemServiceForNameNamespaceObjects.addType(InternalXiItemServiceForNameNamespaceObjects.java:68)
 at com.sap.aii.ib.gui.xiitem.InternalXiItemServiceForNameNamespaceObjects.<init>(InternalXiItemServiceForNameNamespaceObjects.java:55)
 at com.sap.aii.ib.gui.applcomp.StartupCodeEntry.guiStartup(StartupCodeEntry.java:151)
 at com.sap.aii.ib.gui.applcomp.StartupCodeEntry.startup(StartupCodeEntry.java:108)
 at com.sap.aii.ib.core.applcomp.IStartupCodeEntry.startupIfNotAlreadyDone(IStartupCodeEntry.java:33)
 at com.sap.aii.ibrep.gui.applcomp.StartupCodeEntry.startup(StartupCodeEntry.java:68)
 at com.sap.aii.ib.core.applcomp.IStartupCodeEntry.startupIfNotAlreadyDone(IStartupCodeEntry.java:33)
 at com.sap.aii.ib.core.applcomp.ExplicitApplicationComponentImpl.startup(ExplicitApplicationComponentImpl.java:116)
 at com.sap.aii.ib.core.applcomp.ExplicitApplicationComponents.startup(ExplicitApplicationComponents.java:383)
 at com.sap.aii.ib.core.applcomp.ApplicationComponent.startup(ApplicationComponent.java:208)
 at com.sap.aii.ib.gui.login.SplashLoginFrame$6.run(SplashLoginFrame.java:429)
 at java.awt.event.InvocationEvent.dispatch(Unknown Source)
 at java.awt.EventQueue.dispatchEvent(Unknown Source)
 at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.run(Unknown Source)
#2 09:29:40 [AWT-EventQueue-0] DEBUG AutoLog.created.com.sap.aii.ib.core.service.TypeNotRegisteredException: Type "TypeConntestObj" is not registered in the service class Type Service - Type Information
#1 09:29:40 [AWT-EventQueue-0] FINE AutoLog.created.com.sap.aii.ib.core.service.TypeNotRegisteredException: com.sap.aii.ib.core.service.TypeNotRegisteredException: Type "versConflList" is not registered in the service class Type Service - Type Information
 at com.sap.aii.ib.core.service.ServiceBase.getServiceImpl(ServiceBase.java:71)
 at com.sap.aii.ib.bom.gen.TypeServiceImpl.getTypeInformation(TypeServiceImpl.java:82)
 at com.sap.aii.ib.gui.xiitem.services.InternalXiItemService.getTypeInfo(InternalXiItemService.java:23)
 at com.sap.aii.ib.gui.xiitem.services.InternalXiItemServiceBase.<init>(InternalXiItemServiceBase.java:44)
 at com.sap.aii.ib.gui.xiitem.CommonInternalXiItemService$ForVersionConflictList.<init>(CommonInternalXiItemService.java:326)
 at com.sap.aii.ib.gui.applcomp.StartupCodeEntry.guiStartup(StartupCodeEntry.java:147)
 at com.sap.aii.ib.gui.applcomp.StartupCodeEntry.startup(StartupCodeEntry.java:108)
 at com.sap.aii.ib.core.applcomp.IStartupCodeEntry.startupIfNotAlreadyDone(IStartupCodeEntry.java:33)
 at com.sap.aii.ibrep.gui.applcomp.StartupCodeEntry.startup(StartupCodeEntry.java:68)
 at com.sap.aii.ib.core.applcomp.IStartupCodeEntry.startupIfNotAlreadyDone(IStartupCodeEntry.java:33)
 at com.sap.aii.ib.core.applcomp.ExplicitApplicationComponentImpl.startup(ExplicitApplicationComponentImpl.java:116)
 at com.sap.aii.ib.core.applcomp.ExplicitApplicationComponents.startup(ExplicitApplicationComponents.java:383)
 at com.sap.aii.ib.core.applcomp.ApplicationComponent.startup(ApplicationComponent.java:208)
 at com.sap.aii.ib.gui.login.SplashLoginFrame$6.run(SplashLoginFrame.java:429)
 at java.awt.event.InvocationEvent.dispatch(Unknown Source)
 at java.awt.EventQueue.dispatchEvent(Unknown Source)
 at java.awt.EventDispatchThread.pumpOneEventForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
 at java.awt.EventDispatchThread.run(Unknown Source)
#0 09:29:40 [AWT-EventQueue-0] DEBUG AutoLog.created.com.sap.aii.ib.core.service.TypeNotRegisteredException: Type "versConflList" is not registered in the service class Type Service - Type Information
Any assistance is appreciated.
Thanks,
Jeff

Hi Jeff,
Have you seen this SAP note: 859465 ?
some of your error message look exactly like those mentioned in this note...
at com.tssap.dtr.pvc.basics.transaction.WriteSet.getObjects(WriteSet.java(Compiled Code))
at com.tssap.dtr.pvc.basics.persistence.TransactionalComponent.rollback(TransactionalComponent.java:115)
at com.tssap.dtr.pvc.basics.transaction.Transaction.rollback(Transaction.java(Compiled Code))
at com.tssap.dtr.pvc.basics.transaction.Transaction.flushWriteSets(Transaction.java(Compiled Code))
Remember to restart the server after the changes
Regards,
michal
Message was edited by: Michal Krawczyk

Null pointer exception with thread

ok,
When i try to start a thread i get a null pointer exception:
Exception in thread "Thread-2" java.lang.NullPointerException
        at MainWindow$8.run(MainWindow.java:274)
        at java.lang.Thread.run(Thread.java:619)Here is the thread code:
t = new Thread(new Runnable(){
         public void run(){
             for (int i = 100; i > 0; i--){
                 blockArray = p.physicsPass(blockArray);
                 repaintCanvas();
    t.start();After stepping through it it would appear the exception is thrown before physicsPass() gets called...
blockArray is not empty so im not sure what the null pointer is.
Its probably something obvious im missing, any ideas?
Cheers
J

JamesBarnes wrote:
look for the dots?
I dont understand, care to elaborate?In your code there was two dots:
blockArray = p.physicsPass(blockArray);
t.start();So either p was null or t was null.

Null pointer exception with inner class

Hi everyone,
I've written an applet that is an animation of a wheel turning. The animation is drawn on a customised JPanel which is an inner class called animateArea. The main class is called Rotary. It runs fine when I run it from JBuilder in the Applet Viewer. However when I try to open the html in internet explorer it gives me null pointer exceptions like the following:
java.lang.NullPointerException
at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:2761)
at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:2722)
at Rotary$animateArea.paintComponent(Rotary.java:251)
at javax.swing.JComponent.paint(JComponent.java:808)
at javax.swing.JComponent.paintWithOffscreenBuffer(JComponent.java:4771)
at javax.swing.JComponent.paintDoubleBuffered(JComponent.java:4724)
at javax.swing.JComponent._paintImmediately(JComponent.java:4668)
at javax.swing.JComponent.paintImmediately(JComponent.java:4477)
at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:410)
at javax.swing.SystemEventQueueUtilities$ComponentWorkRequest.run(SystemEventQueueUtilities.java:117)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:178)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:448)
at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Do inner classes have to be compiled seperately or anything?
Thanks a million for you time,
CurtinR

I think that I am using the Java plugin ( Its a computer in college so I'm not certain but I just tried running an applet from the Swing tutorial and it worked)
Its an image of a rotating wheel and in each sector of the wheel is the name of a person - when you click on the sector it goes red and the email window should come up (that doesn't work yet though). The stop and play buttons stop or start the animation. It is started by default.
This is the code for the applet:
import java.applet.*;
import javax.swing.JApplet;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.awt.geom.*;
import javax.swing.*;
import java.awt.image.*;
import java.util.StringTokenizer;
import java.net.*;
public class Rotary extends JApplet implements ActionListener, MouseListener
public boolean rotating;
private Timer timer;
private int delay = 1000;
private AffineTransform transform;
private JTextArea txtTest; //temp
private Container c;
private animateArea wheelPanel;
private JButton btPlay, btStop;
private BoxLayout layout;
private JPanel btPanel;
public Image wheel;
public int currentSector;
public String members[];
public int [][]coordsX, coordsY; //stores sector no. and x or y coordinates for that point
final int TOTAL_SECTORS= 48;
//creates polygon array - each polygon represents a sector on wheel
public Polygon polySector1,polySector2,polySector3, polySector4, polySector5,polySector6,polySector7,polySector8,polySector9,polySector10,
polySector11,polySector12,polySector13,polySector14,polySector15,polySector16,polySector17,polySector18,polySector19,polySector20,
polySector21,polySector22,polySector23,polySector24,polySector25,polySector26,polySector27,polySector28,polySector29,polySector30,
polySector31,polySector32,polySector33,polySector34,polySector35,polySector36,polySector37,polySector38,polySector39,polySector40,
polySector41,polySector42,polySector43,polySector44,polySector45,polySector46,polySector47,polySector48;
public Polygon polySectors[]={polySector1,polySector2,polySector3, polySector4, polySector5,polySector6,polySector7,polySector8,polySector9,polySector10,
 polySector11,polySector12,polySector13,polySector14,polySector15,polySector16,polySector17,polySector18,polySector19,polySector20,
 polySector21,polySector22,polySector23,polySector24,polySector25,polySector26,polySector27,polySector28,polySector29,polySector30,
 polySector31,polySector32,polySector33,polySector34,polySector35,polySector36,polySector37,polySector38,polySector39,polySector40,
 polySector41,polySector42,polySector43,polySector44,polySector45,polySector46,polySector47,polySector48};
public void init()
members = new String[TOTAL_SECTORS];
coordsX= new int[TOTAL_SECTORS][4];
coordsY= new int[TOTAL_SECTORS][4];
currentSector = -1;
rotating = true;
transform = new AffineTransform();
//***********************************Create GUI**************************
wheelPanel = new animateArea(); //create a canvas where the animation will be displayed
wheelPanel.setSize(600,580);
wheelPanel.setBackground(Color.yellow);
btPanel = new JPanel(); //create a panel for the buttons
btPanel.setLayout(new BoxLayout(btPanel,BoxLayout.Y_AXIS));
btPanel.setBackground(Color.blue);
btPanel.setMaximumSize(new Dimension(30,580));
btPanel.setMinimumSize(new Dimension(30,580));
btPlay = new JButton("Play");
btStop = new JButton("Stop");
//txtTest = new JTextArea(5,5); //temp
btPanel.add(btPlay);
btPanel.add(btStop);
// btPanel.add(txtTest); //temp
c = getContentPane();
layout = new BoxLayout(c,layout.X_AXIS);
c.setLayout(layout);
c.add(wheelPanel); //add panel and animate canvas to the applet
c.add(btPanel);
wheel = getImage(getDocumentBase(),"rotary2.gif");
getParameters();
for(int k = 0; k <TOTAL_SECTORS; k++)
polySectors[k] = new Polygon();
for(int n= 0; n<4; n++)
polySectors[k].addPoint(coordsX[k][n],coordsY[k][n]);
btPlay.addActionListener(this);
btStop.addActionListener(this);
wheelPanel.addMouseListener(this);
startAnimation();
public void mouseClicked(MouseEvent e)
if (rotating == false) //user can only hightlight a sector when wheel is not rotating
for(int h= 0; h<TOTAL_SECTORS; h++)
if(polySectors[h].contains(e.getX(),e.getY()))
currentSector = h;
wheelPanel.repaint();
email();
public void mouseExited(MouseEvent e){}
public void mouseEntered(MouseEvent e){}
public void mouseReleased(MouseEvent e){}
public void mousePressed(MouseEvent e){}
public void email()
try
URL rotaryMail = new URL("mailto:[email protected]");
getAppletContext().showDocument(rotaryMail);
catch(MalformedURLException mue)
System.out.println("bad url!");
public void getParameters()
StringTokenizer stSector;
String parCoords;
for(int i = 0; i <TOTAL_SECTORS; i++)
{ //put member names in applet parameter list into an array
members[i] = getParameter("member"+i);
//separate coordinate string and store coordinates in 2 arrays
parCoords=getParameter("sector"+i);
stSector = new StringTokenizer(parCoords, ",");
for(int j = 0; j<4; j++)
coordsX[i][j] = Integer.parseInt(stSector.nextToken());
coordsY[i][j] = Integer.parseInt(stSector.nextToken());
public void actionPerformed(ActionEvent e)
wheelPanel.repaint(); //repaint when timer event occurs
if (e.getActionCommand()=="Stop")
stopAnimation();
else if(e.getActionCommand()=="Play")
startAnimation();
public void startAnimation()
if(timer == null)
timer = new Timer(delay,this);
timer.start();
else if(!timer.isRunning())
timer.restart();
Thanks so much for your help!

Null pointer exception with ImageToBuffer.create(........)

I'm trying to draw two lines on received video frames so I implemented an effect that takes a frame then :
frame = Buffer -> Image -> BufferedImage -> draw lines -> Image -> Buffer ( Problem ).
the problem is in converting the Image back to Buffer in order to assign it as the Effect outcome buffer ( which will be showed ), the process function code is as followed :
BufferToImage bti;
ImageToBuffer itb;
public int process(Buffer inBuffer, Buffer outBuffer)
Object data = inBuffer.getData();
if (bti == null)
bti = new BufferToImage( (VideoFormat) inBuffer.getFormat());
Image image = bti.createImage(inBuffer);
if (image != null)
Graphics2D g = bImage.createGraphics();
g.drawImage(image, null, null);
g.drawLine(160, 0, 160, 240);
g.drawLine(0, 120, 320, 120);
if (itb == null)
itb = new ImageToBuffer();
Image i = Toolkit.getDefaultToolkit().createImage(bImage.getSource());
if (b == null)
b = new Buffer();
b = itb.createBuffer(i, 15); ///causes null pointer exception
if (b != null)
inBuffer.setData(outBuffer.getData());
outBuffer.setData(b.getData());
else
inBuffer.setData(outBuffer.getData());
outBuffer.setData(data);
// Copy the input attributes to the output
outBuffer.setFormat(inBuffer.getFormat());
outBuffer.setLength(inBuffer.getLength());
outBuffer.setOffset(inBuffer.getOffset());
return BUFFER_PROCESSED_OK;
Any solutions for the problem.
Thank you for replying in advance..

thanks Timo
through this URL i get possible deletion methods...
pls give more Information about the concept of removeRowWithKey, setCurrentRowWithKey, setCurrentRowWithKeyValue operation.... Just For Knowledge....
Edited by: NZL on Mar 2, 2012 9:37 AM
Edited by: NZL on Mar 2, 2012 9:42 AM

Help please I get Null Pointer Exception with my SQL query

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