Weird null point with win2000 & Jtable
Hi,
I have an application which uses a jtable, which has its own treeCellRenderer.
This application has 2 seperate trees which use the same renderer, 1 tree is always showing, and the other is displayed only at certain times.
Now everything works fine on my machine (win XP), when displaying the 2nd tree....but I tried it on a win2000 machine, and i got a nukk pointer exception.
the null pointer was here:
public Component getTreeCellRendererComponent(JTree tree, Object value, boolean sel, boolean expanded, boolean leaf, int row, boolean hasFocus) {
Object userObject = ((DefaultMutableTreeNode) value).getUserObject();
Map iconMap = (Map) icons.get(userObject.getClass()); //null pointer here
so i am assuming the getUserObject() is returning a null pointer....but i have no idea why...
anyone have any clues?
thansk!
any help on this.. anybody. ?
Similar Messages
-
Please help! I'm new to Java and have done the following:
Created an array to hold 100 records.
Created 5 records for the array (index 0, 1, 2, 3, 4)
Now I'm trying to use a for loop to have a write output of the array values and I'm getting a NULL pointer exception.
Any ideas???When an array is initialized, all its values initially point to null (except for primitives, which point to their respective 0's).Try printing out the index of the value before you print the value - it should fail at index 5. If you want to end the for-loop at the first null entry, use
for(int index = 0 ; index < array.length && array[index] != null ; index++)
array[index].doStuff();
}if you only want to print out non-null values, and skip all the rest, instead use
for(int index = 0 ; index < array.length; index++)
if(array[index] != null )
array[index].doStuff();
} -
Null Pointer Exception and Illegal Arguement when ran with Wireless Toolkit
The following code throws a null pointer exception after it tried to initialize the textBox. I am not sure if there is something I am not importing, or if it's just because I'm sick and my head is cloudy. :-}.
I am using Wireless Toolkit 2.2 and Java 5.0
Anyhelp would be appreicated. Thank You.
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class TacticalTestMain extends MIDlet implements CommandListener {
private Display display;
private Form formMain;
private TextBox tbHelp; //Text Box for help Command
private Command cmExit; //A button to exit midLet
private Command cmBack; //Go "back" to main form
private Command cmHelp; //Ask for help
public TacticalTestMain()
display = Display.getDisplay(this);
formMain = new Form("Tactical Survey Program");
cmExit = new Command("Exit", Command.SCREEN, 1);
cmBack = new Command("Back", Command.BACK, 1);
cmHelp = new Command("Help", Command.HELP, 1);
formMain.addCommand(cmExit);
formMain.addCommand(cmBack);
formMain.addCommand(cmHelp);
formMain.setCommandListener(this);
System.out.println("Before Create Text Box");
//Create the help textBox with a max of 25 charecters
tbHelp = new TextBox("HeLp", "You can press the back button", 25, 0);
tbHelp.addCommand(cmBack);
tbHelp.setCommandListener(this);
System.out.println("AfTER Create Text Box");
}//end constructor
public void startApp()
System.out.println("Inside StartApp()");
display.setCurrent(formMain);
}//end startApp()
public void pauseApp()
}//end pauseApp
public void destroyApp(boolean unconditional)
notifyDestroyed();
}//end destroyApp()
//Check to see if the exit button was selected
public void commandAction(Command c, Displayable d)
System.out.println("Inside commandAction()");
String sLabel = c.getLabel();
if(sLabel.equals("Exit"))
destroyApp(true);
Errors from the KToolbar:
Running with storage root DefaultColorPhone
Before Create Text Box
Unable to create MIDlet TacticalTestMain
java.lang.IllegalArgumentException
at javax.microedition.lcdui.TextField.setChars(+105)
at javax.microedition.lcdui.TextField.setString(+27)
at javax.microedition.lcdui.TextField.<init>(+134)
at javax.microedition.lcdui.TextBox.<init>(+74)
at TacticalTestMain.<init>(+134)
at java.lang.Class.runCustomCode(+0)
at com.sun.midp.midlet.MIDletState.createMIDlet(+19)
at com.sun.midp.midlet.Selector.run(+22)
Execution completed.
743701 bytecodes executed
23 thread switches
741 classes in the system (including system classes)
4071 dynamic objects allocated (120440 bytes)
2 garbage collections (91412 bytes collected)Hi zoya,
Here is the problem:
tbHelp = new TextBox("HeLp", "You can press the back button", 25, 0);
This line declares a maximum textbox size of 25 but in reality he is declaring a textbox of size 29.
Thats why it is throwing the illegal argument.
happy coding :) -
Null pointer Exception with Float.parseFloat
I need to assign a float value from a database to a variable recurrently throughout a while loop. but i am getting a null pointer exception error:
while ( rs.next() )
out.println("<TR>");
float corr = Float.parseFloat((String) request.getParameter("echo"));
out.println("<center><TD><b><font color = #990000>" + rs.getString("race_number") + "</b></TD>");
out.println("<center><TD><b><font color = #990000>" + rs.getString("sail_number") + "</b></TD>");
out.println("<center><TD><b><font color = #990000>" + rs.getString("finish_time_elapsed") + "</b></TD>");
out.println("<center><TD><b><font color = #990000>" + rs.getString("echo") + "</b></TD>");
out.println("</TR>");
I've also tried:
float corr = Float.parseFloat( String request.getParameter("echo"));
float corr = 0;
corr Float.parseFloat((String) request.getParameter("echo"));
corr = echo;
corr = request.getParameter("echo");
corr = rs.getString("echo");
corr = Float.parseFloat(request.getParameter("echo"));
temp = rs.getFloat("Problem_Description");
Any ideas Please!!!Null pointer exception means that the value you are trying to turn into a Float is null. Probably request.getParameter("echo") returns null.
Is "echo" a request parameter, or a field you want to get from the database?
request.getParameter() has nothing to do with a database query.
That is your http request coming from the form submission. It won't change.
If "echo" is meant to be a request parameter, then make sure the parameter is actually present.
If its a database field (stored as a number) then
float corr = rs.getFloat("echo");
should do the trick.
Can the value be null in the database?
Cheers,
evnafets -
Null pointer Exception with removeRowWithKey operation
Hii experts,,,
I am using JDevelepor 11.1.2.1.0 Version
I Am new in ADF ,
In My sample application i select row in iterator by findIterator() method
then get the specified row by getCurrentRow();
then i get the rowKey By row.getKey() method..
I put rowKey as parameter to removeRowWithKey operation
I have get null pointer Exception with removeRowWithKey operation
java.lang.NullPointerException
at oracle.jbo.server.ViewRowSetImpl.prepKeyForFind(ViewRowSetImpl.java:5352)
at oracle.jbo.server.ViewRowSetImpl.findByKey(ViewRowSetImpl.java:5394)
at oracle.jbo.server.ViewRowSetImpl.findByKey(ViewRowSetImpl.java:5296)
at oracle.jbo.server.ViewRowSetImpl.findByKey(ViewRowSetImpl.java:5290)
at oracle.jbo.server.ViewObjectImpl.findByKey(ViewObjectImpl.java:11536)
at oracle.adf.model.binding.DCIteratorBinding.removeRowWithKey(DCIteratorBinding.java:3748)
at oracle.jbo.uicli.binding.JUCtrlActionBinding.doIt(JUCtrlActionBinding.java:1598)
how can solve this???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 -
Null pointer exception with Lists
Hi,
I have got a problem with java.util.List. It is giving Null pointer exception whenever I try to add after extracting from my XML file.I have written the code like this:
List year; //Global variable
List loaddatas; //Global variable
Element e1; //Global
loaddatas=root.getChild("Load").getChildren("LoadData");
int k=loaddatas.size();
for(int i=0;i<loaddatas.size();i++)
e1=(Element)loaddatas.get(i);
year.add(i,Integer.valueOf(e1.getChildText("Year"))); // I am getting exception here.....
root is root element in XML file.
I am able to display "Integer.valueOf(e1.getChildText("Year"))" correctly.
Anybody please tell me how to solve this.
Thanks,
Sai RamLooks like somebody forgot to learn to program before starting to write code....
List list = new ArrayList(); -
SAP Portal Display Documents is hanging with Null Pointer Exception
Hi I am having problems with an iview from the products section of SAP standard iviews
In my portal page I have the following three iviews, find documents, display master data and display documents both the find docs and display master data work great, but the display documents seems to hang and a java Null Pointer Exception shows in the data frame of IE. It hangs up the whole page and I have to keep hitting back button to close the window and open. I have the following in config for web front end
DOC_OBJ is mapped to DOKAR, DOKNR, DOKVR and DOKTL with default set.
DOC_REQ is set to DOKAR default checked
EQUI_REQ is set to EQUI-EQUNR default checked
This is under SIMG_SPORT -> products -> select data fields for web front end
Am I missing something?
Cheers,
DevlinThe following code is your problem:
//-------construct
public void MySlide()
contents = new Tile[ROWS][COLS];
reset();
}Constructors don't return anything including void. Therefore you really aren't calling the above method as you assume in your main method as it is not a constructor. Remove the void keyword and your initializing code will execute properly. -
Help with Null Pointer Exception
Hi, I am working on a simple menu program. It compiles and works correctly except for one item. I am having a problem with Greying out a menu item...... Specifically, When I press the EDIT / OPTIONS / READONLY is supposed to Greyout the Save and SaveAs options. But, when I do that it displays a Null Pointer Exception error message in the command window.
Your advice would be much appreciated!
Now for the code
/ FileName Menutest.java
// Sample Menu
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
public class MenuTest extends JFrame {
private Action saveAction;
private Action saveAsAction;
private JCheckBoxMenuItem readOnlyItem;
// set up GUI
public MenuTest()
super( "Menu Test" );
//* file menu and menu items
// set up File menu and its menu items
JMenu fileMenu = new JMenu( "File" );
// set up New menu item
JMenuItem newItem = fileMenu.add(new TestAction( "New" ));
// set up Open menu item
JMenuItem openItem = fileMenu.add(new TestAction( "Open" ));
// add seperator bar
fileMenu.addSeparator();
// set up Save menu item
JMenuItem saveItem = fileMenu.add(new TestAction( "Save" ));
// set up Save As menu item
JMenuItem saveAsItem = fileMenu.add(new TestAction( "Save As" ));
// add seperator bar
fileMenu.addSeparator();
// set up Exit menu item
JMenuItem exitItem = new JMenuItem( "Exit" );
exitItem.setMnemonic( 'x' );
fileMenu.add( exitItem );
exitItem.addActionListener(
new ActionListener() { // anonymous inner class
// terminate application when user clicks exitItem
public void actionPerformed( ActionEvent event )
System.exit( 0 );
} // end anonymous inner class
); // end call to addActionListener
//* Edit menu and menu items
// set up the Edit menu
JMenu editMenu = new JMenu( "Edit" );
//JMenuItem editMenu = new JMenu( "Edit" );
// set up Cut menu item
Action cutAction = new TestAction("Cut");
cutAction.putValue(Action.SMALL_ICON, new ImageIcon("cut.gif"));
// set up Copy menu item
Action copyAction = new TestAction("Copy");
copyAction.putValue(Action.SMALL_ICON, new ImageIcon("copy.gif") );
// set up Paste menu item
Action pasteAction = new TestAction("Paste");
pasteAction.putValue(Action.SMALL_ICON, new ImageIcon("paste.gif") );
editMenu.add(cutAction);
editMenu.add(copyAction);
editMenu.add(pasteAction);
// add seperator bar
editMenu.addSeparator();
// set up Options menu, and it submenus and items
JMenu optionsMenu = new JMenu("Options");
readOnlyItem = new JCheckBoxMenuItem("Read-only");
readOnlyItem.addActionListener(
new ActionListener()
{ // anonymous inner class
public void actionPerformed( ActionEvent event)
saveAction.setEnabled(!readOnlyItem.isSelected());
saveAsAction.setEnabled(!readOnlyItem.isSelected());
} // end anonymous inner class
); // end call to addActionListener
optionsMenu.add(readOnlyItem);
// add seperator bar
optionsMenu.addSeparator();
// Work on Radio Buttons
ButtonGroup textGroup = new ButtonGroup();
JRadioButtonMenuItem insertItem = new JRadioButtonMenuItem("Insert");
insertItem.setSelected(true);
JRadioButtonMenuItem overTypeItem = new JRadioButtonMenuItem("Overtype");
textGroup.add(insertItem);
textGroup.add(overTypeItem);
optionsMenu.add(insertItem);
optionsMenu.add(overTypeItem);
editMenu.add(optionsMenu);
//* Help menu and menu items
// set up the Help menu
JMenu helpMenu = new JMenu( "Help" );
helpMenu.setMnemonic( 'H' );
// set up index menu item
JMenuItem indexItem = helpMenu.add(new TestAction( "Index" ));
indexItem.setMnemonic( 'I' );
helpMenu.add( indexItem );
// set up About menu item
JMenuItem aboutItem = new JMenuItem( "About" );
aboutItem.setMnemonic( 'A' );
helpMenu.add( aboutItem );
aboutItem.addActionListener(
new ActionListener() { // anonymous inner class
// display message dialog when user selects Open
public void actionPerformed( ActionEvent event )
JOptionPane.showMessageDialog( MenuTest.this,
"This is MenuTest.java \nVersion 1.0 \nMarch 15, 2004",
"About", JOptionPane.PLAIN_MESSAGE );
} // end anonymous inner class
); // end call to addActionListener
// create menu bar and attach it to MenuTest window
JMenuBar bar = new JMenuBar();
setJMenuBar( bar );
bar.add( fileMenu );
bar.add( editMenu );
bar.add( helpMenu );
setSize( 500, 200 );
setVisible( true );
} // end constructor
public static void main( String args[] )
MenuTest application = new MenuTest();
application.setDefaultCloseOperation( JFrame.EXIT_ON_CLOSE );
// inner class to handle action events from menu items
private class ItemHandler implements ActionListener {
// process color and font selections
public void actionPerformed( ActionEvent event )
repaint();
} // end method actionPerformed
} // end class ItemHandler
// Prints to action name to System.out
class TestAction extends AbstractAction
public TestAction(String name) { super(name); }
public void actionPerformed( ActionEvent event )
System.out.println(getValue(Action.NAME) + " selected." );
} // end class TestAction
} // end class MenuTestalan, I've been trying to figure out a solution.
You can initialize it like this
private Action saveAction= new Action();
private Action saveAsAction=new Action();
THE ABOVE WILL NOT WORK.
because Action is an interface. An interface does not have constructors. However, interface references are used for polymorphic purposes.
Anyway, all you have to do is find some class that implemets Action interface.... I cant seem to find one. Or maybe this is not how its supposed to be done?
Hopefully, someone can shed some light on this issue.
FYI,
http://java.sun.com/products/jfc/swingdoc-api-1.1/javax/swing/Action.html -
Null Pointer Exception with Oracle Transformer
Hi all,
I'm getting a NullPointerException after building a DOM tree and feeding it to a stream via the Oracle JAXP transformer. I am trying to convert the data in DOMSource to PDF file. The following code:
TransformerFactory transFact = TransformerFactory.newInstance();
Transformer transForm = transFact.newTransformer();
ByteArrayOutputStream pdfOutStream = new ByteArrayOutputStream();
DOMSource pdfInput = new DOMSource(doc);
StreamResult pdfOutput = new StreamResult(pdfOutStream);
transForm.transform(pdfInput,pdfOutput);
int pdfByteSize = pdfOutStream.size();
System.out.println("Size of pdfByteSize : "+ pdfByteSize);
pdfByte = new byte[pdfByteSize];
pdfByte = pdfOutStream.toByteArray();
InputStream formInputStream = new ByteArrayInputStream(pdfByte);
Iam getting error at "transForm.transform(pdfInput,pdfOutput);".
Here the StackTrace :
07/05/24 10:59:40 XML-22900: (Fatal Error) An internal error condition occurred.
javax.xml.transform.TransformerException: XML-22900: (Fatal Error) An internal error condition occurred.
at oracle.xml.jaxp.JXTransformer.reportException(JXTransformer.java:775)
at oracle.xml.jaxp.JXTransformer.transform(JXTransformer.java:374)
Caused by: java.lang.NullPointerException
at oracle.xml.parser.v2.XMLText.reportSAXEvents(XMLText.java:402)
at oracle.xml.parser.v2.XMLElement.reportChildSAXEvents(XMLElement.java:3072)
at oracle.xml.parser.v2.XMLElement.reportSAXEvents(XMLElement.java:3061)
at oracle.xml.parser.v2.XMLElement.reportChildSAXEvents(XMLElement.java:3072)
at oracle.xml.parser.v2.XMLElement.reportSAXEvents(XMLElement.java:3061)
at oracle.xml.parser.v2.XMLElement.reportChildSAXEvents(XMLElement.java:3072)
at oracle.xml.parser.v2.XMLElement.reportSAXEvents(XMLElement.java:2165)
at oracle.xml.jaxp.JXTransformer.transform(JXTransformer.java:337)
Environment we are using is Sun JDK 1.4.2_06 on Windows, running JDeveloper 10 g with OC4j as Application Server.
Can any one please explain me in this regard?
Thanks
ManojThanks for the Reply.
Before Null Pointer Exception I am getting another Fatal error:
javax.xml.transform.TransformerException: XML-22900: (Fatal Error) An internal error condition occurred.
at oracle.xml.jaxp.JXTransformer.reportException(JXTransformer.java:775)
at oracle.xml.jaxp.JXTransformer.transform(JXTransformer.java:374)
Please Help -
Null pointer Exception with Custom EventQueue
I created a simple class customEventQueue which is extended from EventQueue class and pushed it using
Toolkit.getDefaultToolkit().getSystemEventQueue().push(customEventQueue);
Now, whenever there are three modal dialogs on top of a frame and if I click on top dialog that closes all three dialog boxes, I get nullpointer exception in console. The custom event class does not have any method in it. It just extends from EventQueue.
I checked it in different JRE and it happens only in JRE1.3.1.
Has anybody tried the same thing with custom event queue? Any help is most welcome. Thanks...
java.lang.NullPointerException
at sun.awt.windows.WInputMethod.dispatchEvent(Unknown Source)
at sun.awt.im.InputContext.dispatchEvent(Unknown Source)
at sun.awt.im.InputMethodContext.dispatchEvent(Unknown Source)Hi Chandel me having the same problem
java.lang.NullPointerException
at sun.awt.windows.WInputMethod.dispatchEvent(Unknown Source)
at sun.awt.im.InputContext.dispatchEvent(Unknown Source)
at sun.awt.im.InputMethodContext.dispatchEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(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.KeyboardFocusManager.redispatchEvent(Unknown Source)
at java.awt.DefaultKeyboardFocusManager.dispatchKeyEvent(Unknown
Source)
at
java.awt.DefaultKeyboardFocusManager.preDispatchKeyEvent(Unknown Sour
ce)
at
java.awt.DefaultKeyboardFocusManager.pumpApprovedKeyEvents(Unknown So
urce)
at
java.awt.DefaultKeyboardFocusManager.typeAheadAssertions(Unknown Sour
ce)
at java.awt.DefaultKeyboardFocusManager.dispatchEvent(Unknown
Source)
at java.awt.Component.dispatchEventImpl(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.SequencedEvent.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)
Th bigger problem is that i don't know what is causing this exception, cause the stack trace doesn't mention the line of code where the exception occurred.
In earlier version of java we had pData null pointer exception. This bug manifests when the pull down menu doesn't fit completely into the frame's bounds and swing has to create a seaprate window for the pull-down.
The problem is that WInputMethod caches a reference to peer and that that reference becomes stale when peer is destroyed and recreated.
In this bug cached peer reference becomes stale as the Window for the menu is hidden (and its peer is destroyed) and shown again (with new peer this time).
WInputMethod have a cached reference to the old peer but that old peer is not connected to the underlying native window used to display the menu.
But it's been fixed. I want to know if our problem is in some way related to this pData bug.
Thanx. -
Panic with Raw Socket-Page fault in module "ip" due to a NULL pointer deref
I see a panic when using raw sockets with Solaris 10 10/09 (u8). I included a sample program that can cause this issue (panic happens when a udp datagram is received on port 60000). This sample code works as expected with the previous version I was using - 5/08. If I bind with a port number of 0 I don't see the panic but I don't receive anything either.
I believe I have all the latest patches installed. I'd appreciate any assistance in resolving this. Thanks...
^Mpanic[cpu11]/thread=fffffe8000916c60:
BAD TRAP: type=e (#pf Page fault) rp=fffffe80009166c0 addr=83 occurred in module "ip" due to a NULL pointer dereference
sched:
#pf Page fault
Bad kernel fault at addr=0x83
pid=0, pc=0xffffffffedf86a10, sp=0xfffffe80009167b0, eflags=0x10246
cr0: 8005003b<pg,wp,ne,et,ts,mp,pe> cr4: 6f8<xmme,fxsr,pge,mce,pae,pse,de>
cr2: 83 cr3: 1a345000 cr8: c
rdi: ffffffffa7092808 rsi: ffffffffb0094e00 rdx: ffffffffa73c9d40
rcx: 0 r8: fffffe8000916878 r9: fffffe8000916880
rax: 0 rbx: ffffffffb0094e00 rbp: fffffe8000916800
r10: ffffffffa7c18840 r11: ffffffffa73c9d40 r12: fffffe8000916880
r13: ffffffff9b314000 r14: ffffffff9a70b000 r15: 0
fsb: ffffffff80000000 gsb: ffffffff9c52d800 ds: 43
es: 43 fs: 0 gs: 1c3
trp: e err: 0 rip: ffffffffedf86a10
cs: 28 rfl: 10246 rsp: fffffe80009167b0
ss: 30
fffffe80009165d0 unix:die+da ()
fffffe80009166b0 unix:trap+5e6 ()
fffffe80009166c0 unix:_cmntrap+140 ()
fffffe8000916800 ip:ip_udp_check+b0 ()
fffffe80009168b0 ip:ip_udp_input+15a ()
fffffe80009169d0 ip:ip_input+c7c ()
fffffe8000916aa0 dls:i_dls_link_rx+32e ()
fffffe8000916af0 mac:mac_rx+71 ()
fffffe8000916b90 bnx:bnx_recv_ring_recv+113 ()
fffffe8000916ba0 bnx:bnx_rxpkts_intr+17 ()
fffffe8000916bc0 bnx:bnx_intr_recv+58 ()
fffffe8000916bf0 bnx:bnx_intr_1lvl+120 ()
fffffe8000916c40 unix:av_dispatch_autovect+78 ()
fffffe8000916c50 unix:intr_thread+5f ()
EXAMPLE USED TO CAUSE ABOVE PANIC
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <sys/socket.h>
#include <arpa/inet.h>
#define BUFFER_SIZE 2048
int main(int argc, char *argv[])
int i, j, sd, iosize;
char *ipbuffer;
struct sockaddr_in saddr, daddr;
ipbuffer = calloc( 1, BUFFER_SIZE );
//if ( ( sd = socket(PF_INET, SOCK_DGRAM, IPPROTO_UDP) ) < 0 ) { // Works
if ( ( sd = socket(PF_INET, SOCK_RAW, IPPROTO_UDP) ) < 0 ) { // Fails
perror("socket() error");
exit(-1);
saddr.sin_family = AF_INET;
saddr.sin_addr.s_addr = inet_addr( "0.0.0.0" );
saddr.sin_port = htons( 60000 );
if ( bind( sd, (struct sockaddr *) &saddr, sizeof( saddr ) ) < 0 ) {
perror("bind() error");
exit(-1);
printf( "Awaiting inbound datagrams...\n" );
for ( i = 1; i <= 10; i++ ) {
j = sizeof( daddr );
iosize = recvfrom( sd, ipbuffer, BUFFER_SIZE, 0, (struct sockaddr *) &daddr, &j );
printf( "Received %d bytes from %s\n", iosize, inet_ntoa( daddr.sin_addr ) );
close( sd );
return( 0 );
}------------------------------------------------------------------This issue could be related. Recommend you open a call with support.
http://bugs.opensolaris.org/bugdatabase/view_bug.do?bug_id=6882984 -
Null Pointer Exception when working with Custom Sql
I viewed the video on adding Custom Sql and everything seemed to work fine with regards to adding it to my report. However, I get a null pointer exception when I add a field from the Custom Sql table to the report and try to run the report including if I try to View Sql. There doesn't seem to be a stacktrace that I can show.
BTW... this was a work around for not being able to use Stored Procedures... I have killed 2 days now working on different ways to work around the Stored Procedure thing
Thanks,
SteveHi,
I'm trying to use a custom sql in my report. I could successfully create a custom SQL and add it to my report in the designer. But I'm getting NullPointer exception when I try to see the results in Preview. Can someone please help me resolve this issue.
Thanks! -
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?
ThanksYes 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 -
Null pointer error if not started with 1st in string
hi, this little pratice is about building a simple shopping cart. the TOAD.JSP will display the item list and quantity, user could check item and input the quantity that they want. if the user input larger quantity than database, servlet will sent the back to TOAD.jsp and show message. now it works if selected from 1 item, but if selected 2nd or 3rd, it will have null pointer error over here:
for(int i=0; i<ItemList.size(); i++)
newit = (ItemBean)ItemList.get(i);
if (item != null && item.equals(newit.getItem()) )
%>
<tr>
<td ><input type="checkbox" name = "item" value="<%= newit.getItem() %>"><b><%= newit.getItem() %> </b><br></td>
<td><input type=text name="<%= newit.getItem() %>Qty" value="<%= orderQty%>"></td>
</tr>
<tr><td colspan = 2>
<font size="3" color="red">
The item <%= newit.getItem() %> is NOT available in stock</font>
</td>
</tr>
<%
} else {
%>
<tr>
<td ><input type="checkbox" name = "item" value="<%= newit.getItem() %>"><b><%= newit.getItem() %> </b><br></td>
<td><b><input type=text name="<%= newit.getItem() %>Qty" value="<%= newit.getQty()%>"></b> </td>
</tr>
<%
%>
thanks for your time!You have prvided unsufficent information and poorly formatted code and as such no meaningful answer can given you at present.
But here is the best that one can guess at.
You have a null somewhere.
Is it coming from this code? I am going to say no.
Where does it come from? I don't know.
Where should you look? In the code that does processing to see what happens when yuo have more than one item.
What should you do next? Start putting in some debugging and tracing statements to see where you are heading off into the null abyss. -
Crystal report (crystalReportsViewer) crash with null pointer exception
Hi,
My application are simple : m_crystalReportsViewer.ViewerCore.ReportSource = report; but in throw exception null pointer when I call showDialog.
I see in code, we have method ShowTabHeader.
private void ShowTabHeader(bool isShow)
Grid child = VisualTreeHelper.GetChild(this.tabViews, 0) as Grid;
TabPanel panel = child.FindName("HeaderPanel") as TabPanel;
if (!isShow)
panel.Visibility = Visibility.Collapsed;
else
panel.Visibility = Visibility.Visible;
My problem : child.FindName("HeaderPanel") as TabPanel return null
=> if (!isShow)
panel.Visibility = Visibility.Collapsed;
else
panel.Visibility = Visibility.Visible;
throws null pointer exception.
Do you have any idea about this?
Thanks.
Here is stack trace :
Unerwarteter Fehler im System ---> System.NullReferenceException: Object reference not set to an instance of an object.
at SAPBusinessObjects.WPF.Viewer.ReportAlbum.ShowTabHeader(Boolean isShow)
at SAPBusinessObjects.WPF.Viewer.ReportAlbum.ItemsChangedEventHandler(Object sender, ItemsChangedEventArgs e)
at System.Windows.Controls.Primitives.ItemsChangedEventHandler.Invoke(Object sender, ItemsChangedEventArgs e)
at System.Windows.Controls.ItemContainerGenerator.OnItemAdded(Object item, Int32 index)
at System.Windows.Controls.ItemContainerGenerator.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
at System.Windows.Controls.ItemContainerGenerator.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e)
at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
at System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
at System.Collections.Specialized.NotifyCollectionChangedEventHandler.Invoke(Object sender, NotifyCollectionChangedEventArgs e)
at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Windows.Controls.ItemCollection.System.Windows.IWeakEventListener.ReceiveWeakEvent(Type managerType, Object sender, EventArgs e)
at System.Windows.WeakEventManager.DeliverEventToList(Object sender, EventArgs args, ListenerList list)
at System.Windows.WeakEventManager.DeliverEvent(Object sender, EventArgs args)
at System.Collections.Specialized.CollectionChangedEventManager.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
at System.Windows.Data.CollectionView.OnCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Windows.Data.ListCollectionView.ProcessCollectionChangedWithAdjustedIndex(NotifyCollectionChangedEventArgs args, Int32 adjustedOldIndex, Int32 adjustedNewIndex)
at System.Windows.Data.ListCollectionView.ProcessCollectionChanged(NotifyCollectionChangedEventArgs args)
at System.Windows.Data.CollectionView.OnCollectionChanged(Object sender, NotifyCollectionChangedEventArgs args)
at System.Collections.ObjectModel.ObservableCollection`1.OnCollectionChanged(NotifyCollectionChangedEventArgs e)
at System.Collections.ObjectModel.ObservableCollection`1.InsertItem(Int32 index, T item)
at System.Collections.ObjectModel.Collection`1.Add(T item)
at SAPBusinessObjects.WPF.Viewer.ReportAlbum.OnCreateNewDocumentViewComplete(CreateNewDocumentArgs args)
at SAPBusinessObjects.WPF.Viewer.DelegateMarshaler.<>c__DisplayClass6`1.<Invoke>b__4(Object )
at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
--- End of inner exception stack trace ---
Edited by: duyhai707 on Jul 13, 2011 7:42 PM
Edited by: duyhai707 on Jul 13, 2011 8:09 PMA lot I don't understand in here... actually, I don't understand anything in your post:
When you call ShowDialog, what exactly are you trying to show? The code is the decompiled showtabheader method of the viewer. So, are you trying to override the viewer control and reportalbum? My guess is that the null reference is for the reportalbum's child object which is not the reportalbum object of the viewer. I don't understand why the code since its all handled internally to the viewer anyhow.
Perhaps searching the forum for code sample will help?
Also, see the [WPF Demo|http://www.sdn.sap.com/irj/scn/elearn?rid=/library/uuid/a09f7025-0629-2d10-d7ae-df006a51d1a8]
Other good WPF resources to consult:
http://www.redmondpie.com/incorporate-crystal-reports-in-a-c-wpf-application/
http://www.sdn.sap.com/irj/scn/elearn?rid=/library/uuid/a09f7025-0629-2d10-d7ae-df006a51d1a8
http://www.codeproject.com/Tips/74499/Crystal-Report-in-WPF.aspx
Re: Crystal Reports for Visual Studio 2010 - WPF Viewer for .Net 4.0
http://codegain.com/articles/crystalreports/howto/incorporate-crystal-reports-in-wpf-using-c-sharp.aspx
CRVS2010 Beta - WPF Viewer, how to hide the GroupTree control?
Re: CRVS2010 Beta - WPF Viewer, how to hide the GroupTree control?
Ludek
Follow us on Twitter http://twitter.com/SAPCRNetSup
Got Enhancement ideas? Try the [SAP Idea Place|https://ideas.sap.com/community/products_and_solutions/crystalreports]
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