Which catch statement, returns null
just wanted to if there is any catch statement which returns if the file is null
something like
catch(NullPointException ex){
}
Ashish.Uppin wrote:
just wanted to if there is any catch statement which returns if the file is null
something like
catch(NullPointException ex){
Can I catch a null pointer exception? Yes.
Do I? No
Can you? Probably not.
Similar Messages
-
How to check the sql:query is return null value
I have use :
<sql:query var="sql1" dataSource="${db}">
select col_name from table_name
where a=<c:out value="${row.test1}"/>
and b='<c:out value="${row.test2}"/>'
</sql:query>
So, how can I check this statement return null value which is no record within this table?The Result should never be null but can be empty. You can check if the Result is empty using an if tag and checking the rowCount property:
<sql:query var="books"
sql="select * from PUBLIC.books where id = ?" >
<sql:param value="${bookId}" />
</sql:query>
<c:if test="${books.rowCount > 0}">
</c:if>http://java.sun.com/j2ee/1.4/docs/tutorial/doc/JSTL7.html#wp84217
Look for query Tag Result Interface -
Problem with accessing dynamically created movie clips, returns null...
Hopefully this is a stupid question with an easy answer, if my code is straight forward enough.
I am using this snippet of code to create menu items, and then use the jCount variable below to give the clips an index number, like so (which seems to be working just fine):
for(var j:Number=0;j<xmlSubMenuLength;j++){
var mcSubMenuItem:mcSubMenu=new mcSubMenu();
addChild(mcSubMenuItem);
jCount++;
mcSubMenuItem.name = "mcSubMenuItem" + jCount;
//traces out names correctly
trace ("---------------------------------jCount NAME = "+ mcSubMenuItem.name);
mcSubMenuItem.x=mcMenuHolder.x+20;
mcSubMenuItem.y =mcMenuHolder.y;
mcSubMenuItem.y+= nextBtnY;
nextBtnY+=subtopicSpace;
global_subi.text = String(jCount); //i see the proper count of 10 in the text field
However, when I try to access the clips using this snippet:
for(var j:Number=0;j<Number(global_subi.text);j++)//
trace("GLOBAL SUBI = "+ String(global_subi.text)); //traces out 10, which it should
var scSubMenuItem:String = "mcSubMenuItem" + j;
var scSubContent:Object = this.getChildByName(scSubMenuItem);
trace(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>scSubContent:Object = "+ scSubContent); //returns null!
My last trace statement returns null. Can anyone see my error, or explain why I can't access my clips after they have been created?
Thank you muchly,
~ChiplehHi kglad,
Thanks for the response.
"it's not clear from the shown code that jCount is initialized." - I've posted the relevant code below, which shows that I'm initializing jCount.
"and it's not clear why you don't use j instead of jCount in that for-loop" - j is used as loop for creating the subtopic movie clips within the i for-loop. So, for each topic in i for-loop, create a group of suptopics using the j for-loop. The j for-loop re-initiates j every time the length of the subtopics is reached(if that makes any sense) - i.e. topic1>subtopic 1,2,3,4 : topic2>subtopic>1,2 : topic3>subtopic1,2,3,4
jCount is used to keep a running count of the total number of subtopcs created - i.e. per the example above, jCount will display 10.
var topicSpace:uint=button_mc.height;
var subtopicSpace:uint = button_mc.height;
var nextBtnY:uint = 0;//whatever;
var jCount:Number = 0;
function createXMLMenu(menuLength:Number,itemName:XMLList):void{
var navItemText:XMLList = itemName;
for(var i:Number=0;i<menuLength;i++)
var mcMenuItem:mcMenu=new mcMenu();
addChild(mcMenuItem);
mcMenuItem.btnTxt.htmlText = i+1 +". " +navItemText[i];
mcMenuItem.ivar = i;
mcMenuItem.name = "mcMenuItem" + i;
mcMenuItem.x=mcMenuHolder.x;
mcMenuItem.y =mcMenuHolder.y;
//kglad's addition
mcMenuItem.y+= nextBtnY;
nextBtnY+=topicSpace;
var subVar:Number = i;//mcMenuItem.ivar
//Submenu content
var xmlSubMenuLength:Number = xml.sim.bodyText.page[i].subpage.length()
var menuItemAttachment:MovieClip = MovieClip(mcMenuItem);
for(var j:Number=0;j<xmlSubMenuLength;j++)
var xmlSubPageNumber:XMLList = xml.sim.bodyText.page[subVar].subpage;
var subNavLinkNumber:Number = xmlSubPageNumber[j];
var subTitleText:String = xml.sim.bodyText.page[subVar].subpage.subNavItem[j];
var mcSubMenuItem:mcSubMenu=new mcSubMenu();
trace("mcSubMenuItem.ivar = "+ j+1);
var mc2Attach2:MovieClip = MovieClip(menuItemAttachment);
mcSubMenuItem.btnTxt.htmlText = j+1 +". " +subTitleText;
mcSubMenuItem.ivar = Number(subVar);
mcSubMenuItem.jvar = Number(j);
addChild(mcSubMenuItem);
jCount++;
mcSubMenuItem.name = "mcSubMenuItem" + jCount;
trace ("---------------------------------jCount NAME = "+ mcSubMenuItem.name);
mcSubMenuItem.x=mcMenuHolder.x+20;
mcSubMenuItem.y =mcMenuHolder.y;
//kglad's addition
mcSubMenuItem.y+= nextBtnY;
nextBtnY+=subtopicSpace;
global_subi.text = String(jCount);
mcSubMenuItem.lExtend.visible = false;
global_i.text = String(i);
Then I try to access the clips like so:
-The first for-loop access the topic movie clips, no problem, and traces out scContent correctly.
-The second for-loop traces out null everytime, when I would expect it to be tracing out the names of the subtopic movie clips.
function accessClips(){
//This will access the topic movie clips
for(var i:Number=0;i<Number(global_i.text);i++)
var scMenuItem:String = "mcMenuItem" + i;
var scContent:Object = this.getChildByName(scMenuItem);
trace(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>scContent:Object = "+ scContent);
//This is supposed to access the subtopic movie clips
for(var j:Number=0;j<Number(global_subi.text);j++)//
var scSubMenuItem:String = "mcSubMenuItem" + j;
var scSubContent:Object = this.getChildByName(scSubMenuItem);
trace(">>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>scSubContent:Object = "+ scSubContent);
Hope this makes sense, Chipleh confused. If the code is not clear enough, let me know and I'll try to further clarify.
Thanks again,
~Chipleh -
I am trying to raise a event in one of classes of userControl, and Fire it in the Main class. I tried two different ways to fire this event, one of them works, But I still want to know why other way cannot work, and how to fix it.
My userContol class:
public partial class UserControl1 : UserControl
public UserControl1()
InitializeComponent();
if (System.ComponentModel.DesignerProperties.GetIsInDesignMode(this))
return;
Class1 c = new Class1();
Thread accept = new Thread(
() =>
c.connection();
accept.Start();
And the Class1:
public class Class1
public delegate void myhandler(object sender, EventArgs e);
public event myhandler test;
public Class1()
public void connection()
test(this, new EventArgs());
In the Main, I just simply add into referent, and add
xmlns:my="clr-namespace:WpfControlLibrary1;assembly=WpfControlLibrary1"
then I try to subscribe this event in the main
public partial class SurfaceWindow1 : SurfaceWindow
/// <summary>
/// Default constructor.
/// </summary>
public SurfaceWindow1()
InitializeComponent();
Class1 c = new Class1();
c.test+=new Class1.myhandler(c_test);
// Add handlers for window availability events
AddWindowAvailabilityHandlers();
public void c_test(object sender, EventArgs e)
MessageBox.Show("fire");
If I only raise this event not into thread, it works fine, but If I try to let it raise in this thread, this test event only return null, and shows:
Object reference not set to an instance of an object.
looks like I did not subscribe it ever. So How to fix it if I must use it in thread.Subscribing to events window to class is not a great approach.
You have to then go un subscribe those handlers in order to allow your instance to be disposed.
Forget that and you'll eventually notice you have memory leaks.
The way I do this sort of thing is using mvvm light messenger.
You can keep everything decoupled then.
http://social.technet.microsoft.com/wiki/contents/articles/26070.aspx
I just did a bit of code for someone else which shows how to do cross thread stuff with this approach.
public partial class MainWindow : Window
public MainWindow()
InitializeComponent();
Messenger.Default.Register<String>(this, (action) => ReceiveString(action));
private void ReceiveString(string msg)
MessageBox.Show(msg);
Dispatcher.BeginInvoke((Action)delegate()
tb.Text = msg;
private void Button_Click(object sender, RoutedEventArgs e)
Task.Factory.StartNew(() => {
Messenger.Default.Send<String>("Hello World");
Note that the message arrives on the thread it was sent from. That's not the ui thread because it was sent from that task.factory.startnew to deliberately put it on a different thread.
In order to change UI controls, it uses dispatcher.begininvoke to run code on the UI thread.
Although this is in one piece of code behind publisher and subscriber can be in two totally different classes which have no reference of knowledge of each other.
Meaning you can send a message<t> from any class1 or whatever you like and your mainwindow can subscribe and act of receipt of a message<t>.
It is the type which defines which message one is. You put data you want to send in t and use it in the subscriber.
Hope that helps.
Technet articles: Uneventful MVVM;
All my Technet Articles -
A getName method allways returns null, why?
I have an
ArrayList<Animals> array_list = new ArrayList<Animals>();
LinkedList<Animals> linked_list = new LinkedList<Animals>();
I want the getName() method in class NewListener to be accessed from the class NextListener which extends NewListener, and therefor should get access to the method. But when I run the program, it allways returns null. Why?
class NewListener implements ActionListener
public String name;
public void actionPerformed(ActionEvent e)
String str_name = showInputDialog(this,"Animal name: ",null);
if(str_name == null)
return;
for(int i=0; i<array_list.size(); i++)
if(array_list.get(i).getName().equalsIgnoreCase(str_name))
setName(str_name); // set the name with the setName() method
linked_list.add(array_list.get(i));
public void setName(String name)
this.name=name;
public String getName()
return name; // this line returns "null"
// return "Hello"; // this line works and returns "Hello"
class NextListener extends NewListener implements ActionListener
public void actionPerformed(ActionEvent e)
try
linked_list .removeFirst();
}catch(NoSuchElementException er)
System.out.println("Numerical value");
String info = getName()+" is in line"; // Why does the getName() method in the NewListener allways return a null?
showMessageDialog(this, info, "Notice", INFORMATION_MESSAGE);
}{code}Roxxor wrote:
Ok, I changed the name to private and I also tried with
public void setName(String name)
System.out.println("setting name on " + this + " to " + name); // <--- ADD THIS LINE
this.name=name;
}and it works. So this.name SHOULD get the value of name, but it doesn�t.
So the question is: why does getName() return null?Your code is doing exactly what you're telling it to do. One or more of your assumptions is wrong. Keep digging. Add more print statements.
Above all, you must drop the attitude that "it should work." There's a bug in your code. You have to find it. Repeating the mantra "It should work" is simply going to put blinders on and make it almost impossible to find your error. Instead, you have to think, "What did I do wrong?" and "If getName is returning null, then setName was never called or was called with null." -
GetConnectionURL returns null in Bluetooth Application
Hi,
I am trying to make my first steps with the JSR-82 API on mobile phones
(Nokia 6680 and Sony Ericsson W800i). I have written a simple program
(see code below), which is supposed to discover near-by devices, search
for a given service (UUID) on a chosen (previously discovered) device
(=server) and then to connect to the server and send a byte (n) to it. The
server should then in turn send n+1 back. All this should be done using
RFCOMM.
The code works fine in the emulator as well as on two Nokia phones and
on two SE phones. It further works, when using a Nokia phone as the
server and a SE phone as the client. However, when using a SE as the
client and a Nokia as the server, the call to getConnectionURL() returns
null instead of a valid URL that can be used to set up the connection
(you can find this piece of code in the ClientThread class). Can somebody
explain me what I am doing wrong?
Thanks,
Michael
P.S.:At first I thought it might be a compatibility problem, but in the
BluetoothDemo program that comes with WTK2.2 the correct URL ist
returned by getConnectionURL() (have other problems with this example
though, when it comes to download images, in particular...).
import java.io.IOException;
import java.util.Vector;
import javax.bluetooth.BluetoothStateException;
import javax.bluetooth.DataElement;
import javax.bluetooth.DeviceClass;
import javax.bluetooth.DiscoveryAgent;
import javax.bluetooth.DiscoveryListener;
import javax.bluetooth.LocalDevice;
import javax.bluetooth.RemoteDevice;
import javax.bluetooth.ServiceRecord;
import javax.bluetooth.UUID;
import javax.microedition.io.StreamConnectionNotifier;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.List;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class MessageTest2 extends MIDlet
implements CommandListener, DiscoveryListener {
private final int START = 0;
private final int SERVER_IDLE = 1;
private final int CLIENT_START = 2;
private final int CLIENT_DEVICES_DISCOVERED = 3;
private final int CLIENT_SERVICES_DISCOVERED = 4;
private final String MY_UUID = "F0E0D0C0B0A000908070605040302010";
private final Command EXIT_CMD = new Command("Exit", Command.EXIT, 1);
private final Command OK_CMD = new Command("Ok", Command.OK, 1);
private List startList = new List("Select Type", List.IMPLICIT);
private List deviceList = null;
private List serviceList = null;
private Form mainForm = new Form("Message Test 2");
private int state;
private ServerThread serverThread = null;
private LocalDevice local = null;
private DiscoveryAgent agent = null;
StreamConnectionNotifier server = null;
private Vector devicesFound = null;
private ServiceRecord[] servicesFound = null;
public MessageTest2() {
super();
mainForm.addCommand(EXIT_CMD);
mainForm.addCommand(OK_CMD);
mainForm.setCommandListener(this);
startList.addCommand(EXIT_CMD);
startList.addCommand(OK_CMD);
startList.append("Server", null);
startList.append("Client", null);
startList.setCommandListener(this);
protected void startApp() throws MIDletStateChangeException {
state = START;
Display.getDisplay(this).setCurrent(startList);
protected void pauseApp() {
// TODO Auto-generated method stub
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
// TODO Auto-generated method stub
public void commandAction(Command c, Displayable d) {
if (c == EXIT_CMD) {
if (server != null) {
try {
server.close();
} catch (IOException e) {
notifyDestroyed();
if (c == OK_CMD) {
if (state == START) {
if (startList.getSelectedIndex() == 0) {
startServer();
} else {
startClient();
} else if (state == CLIENT_START) {
doDeviceDiscovery();
} else if (state == CLIENT_DEVICES_DISCOVERED) {
doServiceDiscovery();
} else if (state == CLIENT_SERVICES_DISCOVERED) {
communicate();
public void deviceDiscovered(RemoteDevice dev, DeviceClass devClass) {
devicesFound.addElement(dev);
public void servicesDiscovered(int transID, ServiceRecord[] serviceRecs) {
servicesFound = serviceRecs;
public void serviceSearchCompleted(int transID, int respCode) {
switch(respCode) {
case DiscoveryListener.SERVICE_SEARCH_COMPLETED:
showServices();
break;
case DiscoveryListener.SERVICE_SEARCH_DEVICE_NOT_REACHABLE:
System.err.println("Device not reachable");
break;
case DiscoveryListener.SERVICE_SEARCH_ERROR:
System.err.println("Service search error");
break;
case DiscoveryListener.SERVICE_SEARCH_NO_RECORDS:
System.err.println("No records");
break;
case DiscoveryListener.SERVICE_SEARCH_TERMINATED:
System.err.println("Service search terminated (cancelled)");
break;
public void inquiryCompleted(int param) {
switch (param) {
case DiscoveryListener.INQUIRY_COMPLETED:
showDevices();
break;
case DiscoveryListener.INQUIRY_ERROR:
System.err.println("Inquiry error");
Display.getDisplay(this).setCurrent(mainForm);
break;
case DiscoveryListener.INQUIRY_TERMINATED:
System.err.println("Inquiry terminated (cancelled)");
Display.getDisplay(this).setCurrent(mainForm);
break;
public void setServer(StreamConnectionNotifier server) {
this.server = server;
private void startServer() {
state = SERVER_IDLE;
mainForm.deleteAll();
mainForm.append("Server");
Display.getDisplay(this).setCurrent(mainForm);
String connectionURL = "btspp://localhost:" + MY_UUID + ";"
+ "authenticate=false;encrypt=false;name=RFCOMM Server";
try {
local = LocalDevice.getLocalDevice();
local.setDiscoverable(DiscoveryAgent.GIAC);
} catch (BluetoothStateException e) {
System.err.println(e);
serverThread = new ServerThread(this, connectionURL);
serverThread.start();
System.out.println("Server thread started");
private void startClient() {
state = CLIENT_START;
mainForm.deleteAll();
mainForm.append("Discover?");
Display.getDisplay(this).setCurrent(mainForm);
private void doDeviceDiscovery() {
Form discoveringForm = new Form("discovering");
try {
local = LocalDevice.getLocalDevice();
} catch (BluetoothStateException e) {
System.err.println(e);
agent = local.getDiscoveryAgent();
devicesFound = new Vector();
try {
if (!agent.startInquiry(DiscoveryAgent.GIAC, this)) {
System.err.println("Inquiry not started...");
} catch (BluetoothStateException e) {
System.err.println(e);
Display.getDisplay(this).setCurrent(discoveringForm);
private void doServiceDiscovery() {
if (devicesFound.size() <= 0) return;
int[] attributes = {0x100, 0x101, 0x102};
UUID[] uuids = new UUID[1];
uuids[0] = new UUID(MY_UUID, false);
int index = deviceList.getSelectedIndex();
RemoteDevice rd = (RemoteDevice)devicesFound.elementAt(index);
try {
agent.searchServices(attributes, uuids, rd, this);
} catch (BluetoothStateException e) {
System.err.println(e);
private void showDevices() {
state = CLIENT_DEVICES_DISCOVERED;
deviceList = new List("Discovered Devices", List.IMPLICIT);
deviceList.addCommand(EXIT_CMD);
deviceList.addCommand(OK_CMD);
deviceList.setCommandListener(this);
for (int i = 0; i < devicesFound.size(); i++) {
RemoteDevice rd = (RemoteDevice)devicesFound.elementAt(i);
String str = rd.getBluetoothAddress();
try {
str = str + " " + rd.getFriendlyName(false);
} catch (IOException e) {
deviceList.append(str, null);
Display.getDisplay(this).setCurrent(deviceList);
private void showServices() {
state = CLIENT_SERVICES_DISCOVERED;
if (servicesFound.length <= 0) {
mainForm.deleteAll();
mainForm.append("no services found");
mainForm.append("discover devices?");
state = CLIENT_START;
Display.getDisplay(this).setCurrent(mainForm);
return;
serviceList = new List("Services Found", List.IMPLICIT);
serviceList.addCommand(EXIT_CMD);
serviceList.addCommand(OK_CMD);
serviceList.setCommandListener(this);
for (int i = 0; i < servicesFound.length; i++) {
String str;
ServiceRecord sr = (ServiceRecord)servicesFound;
DataElement de = sr.getAttributeValue(0x100);
str = (String)de.getValue();
serviceList.append(str, null);
Display.getDisplay(this).setCurrent(serviceList);
private void communicate() {
int index = serviceList.getSelectedIndex();
ServiceRecord sr = (ServiceRecord)servicesFound[index];
ClientThread clientThread = new ClientThread(this, sr);
clientThread.start();
public void showResult(int n) {
Form resultForm = new Form("End");
resultForm.addCommand(EXIT_CMD);
resultForm.setCommandListener(this);
resultForm.append("Received: " + n);
Display.getDisplay(this).setCurrent(resultForm);
public void showMessage(String msg) {
Displayable d = Display.getDisplay(this).getCurrent();
Alert al = new Alert("Info", msg, null, AlertType.INFO);
al.setTimeout(Alert.FOREVER);
Display.getDisplay(this).setCurrent(al, d);
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
import javax.microedition.io.StreamConnectionNotifier;
public class ServerThread extends Thread {
private MessageTest2 parent;
private StreamConnectionNotifier server;
private String connectionURL = null;
public ServerThread(MessageTest2 parent, String connectionURL) {
this.parent = parent;
this.connectionURL = connectionURL;
public void run() {
StreamConnection conn = null;
try {
server = (StreamConnectionNotifier) Connector.open(connectionURL);
} catch (IOException e) {
System.err.println(e);
parent.setServer(server);
try {
conn = server.acceptAndOpen();
} catch (IOException e) {
System.err.println(e);
InputStream in = null;
int n = -1;
try {
in = conn.openInputStream();
n = in.read();
} catch (IOException e) {
System.err.println(e);
if (in != null) {
try {
in.close();
} catch (IOException e) {
System.err.println(e);
try {
OutputStream out;
out = conn.openOutputStream();
out.write(n + 1);
out.flush();
} catch (IOException e) {
System.err.println(e);
try {
conn.close();
} catch (IOException e) {
System.out.println(e);
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import javax.bluetooth.ServiceRecord;
import javax.microedition.io.Connector;
import javax.microedition.io.StreamConnection;
public class ClientThread extends Thread {
private MessageTest2 parent;
private ServiceRecord sr;
public ClientThread(MessageTest2 parent, ServiceRecord sr) {
this.parent = parent;
this.sr = sr;
public void run() {
StreamConnection conn = null;
String url = null;
int n = 0;
try {
url = sr.getConnectionURL(
ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
if (url == null) {
parent.showMessage("URL null");
return;
conn = (StreamConnection) Connector.open(url);
} catch (IOException e) {
System.err.println("Note: can't connect to: " + url);
try {
OutputStream out = conn.openOutputStream();
out.write(n);
out.flush();
out.close();
InputStream in = conn.openInputStream();
n = in.read();
} catch (IOException e) {
System.err.println("Can't write to server for: " + url);
try {
conn.close();
} catch (IOException ee) {
System.err.println(ee);
parent.showResult(n);Hi:
How did you compile and build the package using WSDL2JAVA. I tried under UCM 6.1 environment but receiving error message on 2 of the classes that, too large object.
axisbuild:
compiling 1007 source files
/generatedaxisclient/com/cisco/www/AXLAPLService/AXLAPIBindingStub.java:4026:code too large
public AXLAPIBindingStub(javax.xml.rpc.Service service)throws org.apache.axis.AxisFault {
Error
/generatedaxisclient/com/cisco/www/AXLAPLService/AXLAPIBindingStub.java:18:code too large
public AXLAPIBindingStub(javax.xml.rpc.Service service)throws org.apache.axis.AxisFault {
static {
Error
2 Errors
Please let me know if you have any thoughts on this.
Thank You
Ramesh Vasudevan -
FrameGrabbingControl returns null
In my code i want to grab a frame from a video and displey it in another window.But the problem is that " FrameGrabbingControl fgc =(FrameGrabbingControl) player.getControl("javax.media.control.FrameGrabbingControl");" returns null.Please help me by pionting out the error. Thanks in advance.
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.lang.Thread;
import java.util.*;
import java.lang.*;
import java.lang.String;
import java.net.URL;
import java.net.MalformedURLException;
import java.io.IOException;
import java.util.Properties;
import javax.media.*;
import java.applet.*;
import javax.swing. *;
import javax.swing.border. *;
import javax.media.datasink. *;
import javax.media.format. *;
import javax.media.protocol. *;
import javax.media.util. *;
import javax.media.control. *;
import java.awt.image. *;
import com.sun.image.codec.jpeg. *;
import com.sun.media.protocol.vfw.VFWCapture;
import java.io.*;
import javax.media.control.FrameGrabbingControl;
//import com.sun.media.util.JMFSecurity;
* This is a Java Applet that demonstrates how to create a simple
* media player with a media event listener. It will play the
* media clip right away and continuously loop.
* <!-- Sample HTML
* <applet code=SimplePlayerApplet width=320 height=300>
* <param name=file value="sun.avi">
* </applet>
* -->
public class grabframe extends Applet implements ControllerListener,ActionListener
static int shotCounter = 1;
Button button;
// media Player
Player player = null;
// component in which video is playing
Component visualComponent = null;
// controls gain, position, start, stop
Component controlComponent = null;
// displays progress during download
Component progressBar = null;
boolean firstTime = true;
long CachingSize = 0L;
Panel panel = null;
int controlPanelHeight = 0;
int videoWidth = 0;
int videoHeight = 0;
* Read the applet file parameter and create the media
* player.
public void init()
setLayout(new BorderLayout());
setBackground(Color.white);
panel = new Panel();
//panel.setLayout( null );
add(panel,BorderLayout.SOUTH);
panel.setBounds(0, 0, 320, 240);
button=new Button("GRAB FRAME");
panel.add(button);
button.addActionListener(this);
// input file name from html param
String mediaFile = null;
// URL for our media file
MediaLocator mrl = null;//MediaLocator describes the location of the media content while
URL url = null;//URL specify the location of the media
// Get the media filename info.
// The applet tag should contain the path to the
// source media file, relative to the html page.
if ((mediaFile = getParameter("file")) == null)
Fatal("Invalid media file parameter");
//System.out.println("mediafile :"+mediaFile);
try
url = new URL(getDocumentBase(), mediaFile);//return a new URL using an existing URL as reference
// System.out.println("url :"+url);
mediaFile = url.toExternalForm();//return a string representation of the URL
// System.out.println("mediafile :"+mediaFile);
catch (MalformedURLException mue)
try
// Create a media locator from the file name
if ((mrl = new MediaLocator(mediaFile)) == null)
Fatal("Can't build URL for " + mediaFile);
// Create an instance of a player for this media
try
player = Manager.createPlayer(mrl);
catch (NoPlayerException e)
System.out.println(e);
Fatal("Could not create player for " + mrl);
/* catch (CannotRealizeException e)
System.out.println(e);
Fatal("Could not create player for " + mrl);
// Add ourselves as a listener for a player's events
player.addControllerListener(this);
catch (MalformedURLException e)
Fatal("Invalid media file URL!");
catch (IOException e)
Fatal("IO exception creating player for " + mrl);
// This applet assumes that its start() calls
// player.start(). This causes the player to become
// realized. Once realized, the applet will get
// the visual and control panel components and add
// them to the Applet. These components are not added
// during init() because they are long operations that
// would make us appear unresposive to the user.
}//end of init
* Start media file playback. This function is called the
* first time that the Applet runs and every
* time the user re-enters the page.
public void start()
//$ System.out.println("Applet.start() is called");
// Call start() to prefetch and start the player.
if (player != null)
player.start();
* Stop media file playback and release resource before
* leaving the page.
public void stop()
//$ System.out.println("Applet.stop() is called");
if (player != null)
player.stop();
player.deallocate();
public void destroy()
//$ System.out.println("Applet.destroy() is called");
player.close();
* This controllerUpdate function must be defined in order to
* implement a ControllerListener interface. This
* function will be called whenever there is a media event
public synchronized void controllerUpdate(ControllerEvent event)
// If we're getting messages from a dead player,
// just leave
if (player == null)
return;
// When the player is Realized, get the visual
// and control components and add them to the Applet
if (event instanceof RealizeCompleteEvent)
if (progressBar != null)
panel.remove(progressBar);
progressBar = null;
int width = 320;
int height = 0;
if (controlComponent == null)
if (( controlComponent = player.getControlPanelComponent()) != null)
//controlPanelComponent provides the default user interface for controlling the player
controlPanelHeight = controlComponent.getPreferredSize().height;
panel.add(controlComponent);
height += controlPanelHeight;
if (visualComponent == null)
if (( visualComponent = player.getVisualComponent())!= null)
//visualComponent provides display component(where the visual media is recorded) of the player
panel.add(visualComponent,BorderLayout.CENTER);
Dimension videoSize = visualComponent.getPreferredSize();
videoWidth = videoSize.width;
videoHeight = videoSize.height;
width = videoWidth;
height += videoHeight;
visualComponent.setBounds(0, 0, videoWidth, videoHeight);
panel.setBounds(0, 0, width, height);
if (controlComponent != null)
controlComponent.setBounds(0, videoHeight,width, controlPanelHeight);
controlComponent.invalidate();
} //end of RearizedCompleteEvent
else if (event instanceof CachingControlEvent)
if (player.getState() > Controller.Realizing)
return;
// Put a progress bar up when downloading starts,
// take it down when downloading ends.
CachingControlEvent e = (CachingControlEvent) event;
CachingControl cc = e.getCachingControl();
// Add the bar if not already there ...
if (progressBar == null)
if ((progressBar = cc.getControlComponent()) != null)
panel.add(progressBar);
panel.setSize(progressBar.getPreferredSize());
validate();
} //end of CashingControlEvent
else if (event instanceof EndOfMediaEvent)
// We've reached the end of the media; rewind and
// start over
player.setMediaTime(new Time(0));
player.start();
} //end of EndOfMediaEvent
else if (event instanceof ControllerErrorEvent)
// Tell TypicalPlayerApplet.start() to call it a day
player = null;
Fatal(((ControllerErrorEvent)event).getMessage());
}//end of ControllerErrorEvent
else if (event instanceof ControllerClosedEvent)
panel.removeAll();
}//end of ControllerClosedEnent
}//end of controller update
void Fatal (String s)
// Applications will make various choices about what
// to do here. We print a message
System.err.println("FATAL ERROR: " + s);
throw new Error(s); // Invoke the uncaught exception
// handler System.exit() is another
// choice.
public void actionPerformed(ActionEvent ae)
Dimension imageSize = null;
String str=ae.getActionCommand();
if(str.equals ("GRAB FRAME"))
Image photo = grabFrameImage();
if (photo != null)
MySnapshot snapshot = new MySnapshot(photo, new Dimension(imageSize));
else
System.err.println("Errore : Impossibile grabbare il frame");
repaint();
* Grabba un frame dalla webcam @restituisce il frame in un buffer
public Buffer grabFrameBuffer()
if (player != null)
FrameGrabbingControl fgc =(FrameGrabbingControl) player.getControl("javax.media.control.FrameGrabbingControl");
System.out.println(fgc );
if (fgc != null)
return (fgc.grabFrame());
else
System.err.println("Errore : FrameGrabbingControl non disponibile");
return (null);
else
System.err.println("Errore nel Player");
return (null);
* Converte il buffer frame in un'immagine
public Image grabFrameImage()
Buffer buffer = grabFrameBuffer();
if (buffer != null)
BufferToImage btoi = new BufferToImage((VideoFormat) buffer.getFormat());
if (btoi != null)
Image image = btoi.createImage(buffer);
if (image != null)
return (image);
else
System.err.println("Errore di conversione Buffer - BufferToImage");
return (null);
else
System.err.println("Errore nella creazione di BufferToImage");
return (null);
else
System.out.println("Errore: buffer vuoto");
return (null);
class MySnapshot extends JFrame
protected Image photo = null;
protected int shotNumber;
public MySnapshot(Image grabbedFrame, Dimension imageSize)
super();
shotNumber = shotCounter++;
setTitle("Immagine" + shotNumber);
photo = grabbedFrame;
setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);
int imageHeight = photo.getWidth(this);
int imageWidth = photo.getHeight(this);
setSize(imageSize.width, imageSize.height);
final FileDialog saveDialog = new FileDialog(this,"Salva immagine", FileDialog.SAVE);
final JFrame thisCopy = this;
saveDialog.setFile("Immagine" + shotNumber);
addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
saveDialog.show();
String filename = saveDialog.getFile();
if (filename != null)
if (saveJPEG(filename))
JOptionPane.showMessageDialog(thisCopy,"Salvata immagine " + filename);
setVisible(false);
dispose();
else
JOptionPane.showMessageDialog(thisCopy,"Errore nel salvataggio di " + filename);
else
setVisible(false);
dispose();
setVisible(true);
public void paint(Graphics g)
g.drawImage(photo, 0, 0, getWidth(), getHeight(), this);
public boolean saveJPEG(String filename)
boolean saved = false;
BufferedImage bi = new BufferedImage(photo.getWidth(null), photo.getHeight(null), BufferedImage.TYPE_INT_RGB);
Graphics2D g2 = bi.createGraphics();
g2.drawImage(photo, null, null);
FileOutputStream out = null;
try
out = new FileOutputStream(filename);
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
JPEGEncodeParam param = encoder.getDefaultJPEGEncodeParam(bi);
param.setQuality(1.0f, false);
encoder.setJPEGEncodeParam(param);
encoder.encode(bi);
out.close();
saved = true;
catch (Exception ex)
System.out.println("Errore salvataggio JPEG: "+ ex.getMessage());
return (saved);
}//end of class SimplePlayerAppletHmm....
some of that looks very familiar to me :-)
http://forum.java.sun.com/thread.jspa?forumID=28&threadID=570463
1. post your code wrapped in code tags and it'll display it nicely.
2. post to the Java Media Framework topic,
I haven't tried JMF within an applet.
Have you tried getting it working in an application first ?
That should simplify your debugging to start with.
I suspect the Player hasn't started yet, or isn't in a realised state.
regards,
Owen -
Hi there!,
Need to know where the control passes if an error is caught in a catch statement.
Suppose no alternative error handling code has been specified. Where would control go if a terminal error occured? Would it just carry on to the next statement in the general flow or would it terminate the application/applet. By terminal, i mean something like getParameter() returning null etc..
Any help that sheds light on this is appreciated greatly.
To make this clearer, how would the program know when to exit a try catch statement if it falls into a catch statement that gave a nonsensical value?You should be careful with your terms, "an error is
caught" has a very specific meaning in Java. Errors
(instances of java.lang.Error and it's subclasses)
should not be caught (that is, with a try-catch
statement) in your code because they signal more
serious problems than usual (like ClassNotFoundError,
LinkageError, VirtualMachineError, and so on), not in
switch statements or otherwise.In certain situations they should be caught.
If I create a stand alone app with a client GUI it doesn't matter to the user if a null pointer exception, because of programmer error, occurs in the database layer. But they are going to get real upset if the app just abruptly exits which is what is going to happen if the GUI layer doesn't catch all of the exceptions. And although it is possible that one of those exceptions makes it impossible to do anything at all, it is much more likely that the GUI can at least display a message to the user before exiting. And write the stack trace to a file as well.
This is true at the interface between any two layers. And some applications will be able to continue. I certainly don't want a J2EE server exiting because one of the new beans isn't working correctly. It won't stop the other beans from working. -
Kff.where returns 'null' and causes sql error - looking for a work around
Hello,
I am using BI 5.6.3 in EBS (11.5.10.2)
I have created a kff.where as follows:
<lexical
type="oracle.apps.fnd.flex.kff.where"
name="lp_location_where_clause"
comment="Comment"
application_short_name="OFA"
id_flex_code="LOC#"
id_flex_num=":lp_location_flex_structure"
code_combination_table_alias="loc"
segments="ALL"
operator="BETWEEN"
operand1=":p_location_low"
operand2=":p_location_high"/>
</lexicals>
Everything works fine, as long as I have a values for the p_location_low and p_location_high. However, this is a parameter that comes in from a concurrent program and is optional. When the user doesn't pick a value, :p_location_low is the concatenated delimiters for the location '..'.
When this runs, the kff.where is returning null which causes 'Invalid Relational Operation error' because 'AND null' is not valid.
Warning in the log is :[091910_025232517][][STATEMENT] !!Warning: FlexAPI returns null for 'x_where_expression' lexical definition...
Does anyone have a workaround for this since making the parameter required is not an option for my users?
Thanks for reading.In your SQL*Plus session, make sure you
SQL> set define offbefore trying to create the Java stored procedure. SQL*Plus assumes that any string that begins with an & is a substitution variable unless you tell it that you have no substitution variables (via set define off).
Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC -
Naming.lookup() returns null???? Why??
I read about this in a previous forum but there was no answer given to someones question about it. Sometimes Naming.lookup() returns null and a later call will succeed. Is there a recognised reason for this? Is it a recognised bug or undocumented feature?
I have seen some sample RMI source on the Internet and sometimes the code checks for null and gives and error. The sample programs from Sun regarding RMI don't check for null.
Has anyone ever encountered this and found a way around it?
Thanks for you help,
Anthonyhi
are you using an Activatable object??
then, it can happens, since you won't have your object until the ActivationSytem is running.
And it takes little time for the activation system to run.
If u are using an 'Activatable object, i will suggest to write a loop in which you check if hte ActivationSystem was started.
something like this
boolean display = false;
ActivationGroupID agi = null;
while(true) {
try {
if(!display) {
System.err.println("Trying to connect to ActivationSystem...");
display = !display;
agi = ActivationGroup.getSystem().registerGroup(exampleGroup);
break;
} catch(Exception e) {
continue;
} -
Get attribute name from VO returns null.
Hello,
I'm using JDeveloper 11.1.1.3. I have an af:inputfile component in which i set a ValueChangeListener. I'm using the attribute "Filename" from the form view to set the name of the file before saving it to a directory. At first, i had a different layout for my jspx page (very similar in design) and everything was working perfectly. When i redesigned the page, i'm now getting "null" as the filename. I'm not able to get the attribute! Although i didn't change anything in the code! I tried writing a simple method to output the attribute:
public String justOutput(){
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
AttributeBinding attr = (AttributeBinding) bindings.getControlBinding("Filename");
if (attr == null)
return null;
String filename = (String) attr.getInputValue();
System.out.print(filename);
return null;
}It was able to output the attribute. But in my original method i'm getting "null".
******Another important observation*******
If i pressed upload another time at runtime and uploaded another file it works again!
Here is my code:
public void uploadFile(ValueChangeEvent valueChangeEvent) {
InputStream in;
FileOutputStream out;
ExternalContext context = FacesContext.getCurrentInstance().getExternalContext();
String fileLoc = context.getInitParameter("DATA_DIR");
UploadedFile file= (UploadedFile)valueChangeEvent.getNewValue();
boolean exists = (new File(fileLoc)).exists();
if(!exists){
(new File(fileLoc)).mkdirs();
if(file != null && file.getLength() > 0){
FacesContext context2 = FacesContext.getCurrentInstance();
FacesMessage message = new FacesMessage("File Uploaded" + file.getFilename() +
"(" + file.getLength() + "bytes)");
//context2.addMessage(valueChangeEvent.getComponent().getClientId(context2), message);
BindingContainer bindings = BindingContext.getCurrent().getCurrentBindingsEntry();
AttributeBinding attr = (AttributeBinding) bindings.getControlBinding("Filename");
if (attr == null)
return;
String filename = (String) attr.getInputValue();
try {
out = new FileOutputStream("C:\\demos\\" + filename + ".pdf");
in = file.getInputStream();
for (int bytes=0; bytes < file.getLength(); bytes++) {
out.write(in.read());
in.close();
out.close();
} catch (IOException e) {
e.printStackTrace();
else {
String filename = file != null ? file.getFilename():null;
String byteLength = file != null ? "" + file.getLength():"0";
}I don't think the code is wrong because it worked before. But why is this happening?
Can anyone please help!?
Mohamed.Sorry for the late reply Frank,
Thanks for your reply, no i didn't! But it worked when i set the 'autosubmit' property to true... Like you said:
the name field hasn't updated the model to the time you try and access itThanks again.
Mohamed -
Field.get(Object obj) now returning null with Generics (Java 5.0) ??
Hello,
I'm currently using Java 5.0 (especially for the Generics part) on a new Java/J2EE project, but having a strange issue with code working previously in a Java 1.4 project.
Below is an overriding of the toString() method provided by the Object class which allow me to view nicely in debug (dev. mode) the contents of my Transfer Objects (all the TO's must extend this ATO abstract class).
Previously this code displayed me something like:
[field1 => value1, field2 => value2] ... for a TO (sort of "Javabean") having e.g. two String fields with values initialized to "value1" (resp. "value2").
But unfortunately, this does (or seems) not to work anymore, having such display :
[field1 => null, field2 => null]I tried to debug, and the problem is that the call fieldValue = field.get(this); returns null while it should returns the actual value of the field.
I thing it it strongly related to Generics, but could not at the moment found how/why it does not work.
May someone help...? Thanks.
public abstract class ATO {
// Reflection for field value display
public String toString() {
StringBuffer sb = new StringBuffer("[");
MessageFormat mf = new MessageFormat("{0} => {1}, ");
Field[] fields = this.getClass().getDeclaredFields();
for (int i = 0; i < fields.length; i++) {
Field field = (Field) fields;
String fieldName = field.getName();
Object fieldValue = null;
try {
fieldValue = field.get(this);
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
mf.format(new Object[] { fieldName, fieldValue }, sb, null);
if (sb.length() > 1) {
sb.setLength(sb.length() - 2);
sb.append("]");
return sb.toString();ejp wrote:
Field field = (Field) fields;
This cast is unnecessary.
Effectively, I haven't noticed it yet. Fixed.
} catch (IllegalArgumentException e) {
} catch (IllegalAccessException e) {
}Either the field value really is null or you are getting one of these exceptions which you are ignoring. Never write empty catch blocks.That's true, I missed something. Fixed with some code to log the eventual exceptions.
Thanks for you answer. -
How to find out which sub query returns more than one row
Hi all,
Can any one give me clue ,how to find out which sub query returns more than one row in the following query .
/* Formatted on 2011/05/17 19:22 (Formatter Plus v4.8.8) */
SELECT a.*, ROWNUM AS rnm
FROM (SELECT DISTINCT '1' AS "Page View", ou.org_unit_name AS "Org",
prxm.mbr_idntfr AS "Beneficiary ID",
md.last_name
|| ', '
|| md.first_name AS "Beneficiary Name",
pci.idntfr AS "Tracking No.",
TO_CHAR (TRUNC (req.pa_rqst_date),
'MM/dd/yyyy'
) AS "Request Date",
sts.status_name AS "Status",
req.pa_rqst_sid AS "Request #",
prxm.mbr_sid AS "Mbr_sid",
TO_CHAR
(TRUNC (req.pa_revision_date),
'MM/dd/yyyy'
) AS "Last Updated",
TO_CHAR (psd.TO_DATE, 'MM/dd/yyyy') AS "TO_DATE",
prxpl.prvdr_lctn_iid AS "PRVDR_LCTN_IID",
pd.prvdr_sid AS "PRVDR_SID", 'Y' AS "State View",
DECODE
((SELECT DISTINCT pd.national_prvdr_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid =
req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
0, (SELECT prxplo.prvdr_lctn_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
NULL, (SELECT prxplo.prvdr_lctn_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
(SELECT DISTINCT pd.national_prvdr_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid =
req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR')
) AS "NPI/ID",
DECODE
((SELECT pd.org_bsns_name
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
NULL, (SELECT pd.last_name
|| ', '
|| pd.first_name
|| ' '
|| pd.middle_name
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
(SELECT pd.org_bsns_name
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR')
) AS "Prvdr Name",
TO_CHAR (psd.from_date,
'MM/dd/yyyy'
) AS "Srvc From Date",
TO_CHAR (req.validity_start_date,
'MM/DD/YYYY'
) AS "Due Date",
(fn_get_busniess_days (TRUNC (req.validity_start_date))
) AS "Days<br>Left",
req.pa_mode_type_lkpcd AS "Source",
TO_CHAR (TRUNC (wmdtl.rtng_date),
'MM/dd/yyyy'
) AS "Assigned On",
NVL (wmdtl.assigned_to_user_name,
'Not Assigned'
) AS "Assigned To",
req.org_unit_sid AS "OrgUnitSid",
TO_CHAR
(wmdtl.modified_date,
'MM/dd/yyyy hh24:mi:ss'
) AS "WTRD_MODIFIED_DATE",
TO_CHAR (wmdtl.rtng_date,
'MM/dd/yyyy'
) AS "WTRD_RTNG_DATE",
req.status_cid AS "PA_STATUS_CID",
TO_CHAR (req.modified_date,
'MM/dd/yyyy'
) AS "PA_REQ_MODIFIED_DATE",
prs.state_pa_srvc_type_code
AS "STATE_PA_SRVC_TYPE_CODE",
wmdtl.wm_pa_task_rtng_dtl_sid
AS "WM_TASK_RTNG_DTL_SID",
wmdtl.assigned_to_user_acct_sid
AS "WTRD_Assigned_to_user_acct_sid",
(fn_get_busniess_days (TRUNC (req.validity_start_date))
) AS "Days<br>LeftSort",
wmdtl.assigned_to_org_unit_sid
AS "WTRD_Assigned_to_OrgUntSid",
DECODE
((SELECT COUNT (*)
FROM pa_request_status prs
WHERE prs.pa_rqst_sid = req.pa_rqst_sid
AND prs.status_cid = 5
AND prs.oprtnl_flag = 'I'),
0, 'N',
'Y'
) AS "SHOW_UTILIZATION"
FROM pa_request req,
pa_certification_identifier pci,
status sts,
pa_request_x_member prxm,
wm_pa_task_routing_detail wmdtl,
pa_service_date psd,
org_unit ou,
pa_request_service prs,
pa_request_x_provider_location prxpl,
provider_location pl,
provider_detail pd,
provider p,
mbr_dmgrphc md
WHERE req.oprtnl_flag = 'A'
AND req.status_cid NOT IN
(20, 30, 70, 25, 80, 96, 85, 5, 97, 98, 101)
AND req.org_unit_sid IN
(3057, 3142, 3058, 3143, 3059, 3144, 3060, 3145,
3061, 3146, 3062, 3147, 3063, 3148, 3064, 3149,
3065, 3150, 3066, 3151, 3067, 3152, 3068, 3153,
3069, 3154, 3070, 3155, 3071, 3156, 3072, 3157,
3073, 3158, 3074, 3159, 3075, 3160, 3076, 3161,
3077, 3162, 3078, 3163, 3079, 3164, 3080, 3165,
3081, 3166, 3082, 3167, 3083, 3168, 3084, 3169,
3085, 3170, 3086, 3171, 3087, 3172, 3088, 3173,
3089, 3174, 3090, 3175, 3091, 3176, 3092, 3177,
3093, 3178, 3094, 3179, 3095, 3180, 3096, 3181,
3097, 3182, 3098, 3183, 3099, 3184, 3100, 3185,
3101, 3186, 3102, 3187, 3103, 3003, 75000104,
75000108, 2006, 75000103, 75000102, 75000113,
75000111, 75000109, 2001, 2009, 75000105,
75000107, 2004, 2010, 2013, 2014, 2005, 2011,
75000112, 2002, 1001, 2012, 75000106, 2007,
75000101, 2003, 75000110, 2008, 3001, 3002, 3019,
3104, 3020, 3105, 3021, 3106, 3022, 3107, 3023,
3108, 3024, 3109, 3025, 3110, 3026, 3111, 3027,
3112, 3028, 3113, 3029, 3114, 3030, 3115, 3031,
3116, 3032, 3117, 3033, 3118, 3034, 3119, 3035,
3120, 3036, 3121, 3037, 3122, 3038, 3123, 3039,
3124, 3040, 3125, 3041, 3126, 3042, 3127, 3043,
3128, 3044, 3129, 3045, 3130, 3046, 3131, 3047,
3132, 3048, 3133, 3049, 3134, 3050, 3135, 3051,
3136, 3052, 3137, 3053, 3138, 3054, 3139, 3055,
3140, 3056, 3141)
AND req.pa_rqst_sid = prs.pa_rqst_sid
AND prs.oprtnl_flag = 'A'
AND prs.pa_rqst_srvc_sid = psd.pa_rqst_srvc_sid
AND psd.oprtnl_flag = 'A'
AND req.pa_rqst_sid = pci.pa_rqst_sid
AND pci.oprtnl_flag = 'A'
AND req.pa_rqst_sid = prxm.pa_rqst_sid
AND prxm.oprtnl_flag = 'A'
AND md.oprtnl_flag = 'A'
AND md.status_cid = 2
AND TRUNC (SYSDATE) BETWEEN md.from_date AND md.TO_DATE
AND prxm.mbr_sid = md.mbr_sid
AND ou.org_unit_sid = req.org_unit_sid
AND ou.oprtnl_flag = 'A'
AND req.pa_rqst_sid = prxpl.pa_rqst_sid
AND prxm.pa_rqst_sid = prxpl.pa_rqst_sid
AND pci.pa_rqst_sid = prxm.pa_rqst_sid
AND pci.pa_rqst_sid = wmdtl.subsystem_task_sid
AND pci.pa_rqst_sid = prxpl.pa_rqst_sid
AND prxpl.pa_prvdr_type_lkpcd = 'RR'
AND prxpl.oprtnl_flag = 'A'
AND req.status_cid = sts.status_cid
AND sts.status_type_cid = 3
AND sts.oprtnl_flag = 'A'
AND prxpl.prvdr_lctn_iid = pl.prvdr_lctn_iid
AND p.prvdr_sid = pd.prvdr_sid
AND p.prvdr_sid = pl.prvdr_sid
AND pd.oprtnl_flag = 'A'
AND pd.status_cid = 2
AND TRUNC (SYSDATE) BETWEEN pd.from_date AND pd.TO_DATE
AND wmdtl.subsystem_task_sid = req.pa_rqst_sid
AND wmdtl.subsystem_lkpcd = 'PA'
AND wmdtl.oprtnl_flag = 'A'
AND req.pa_rqst_date > (SYSDATE - 365)
ORDER BY TO_DATE ("Request Date", 'MM/dd/yyyy hh24:mi:ss') DESC,
"Beneficiary Name" ASC) a
WHERE ROWNUM < 102;regards,
P Prakash
Edited by: BluShadow on 17-May-2011 15:01
added {noformat}{noformat} tags around the code833560 wrote:
Can any one give me clue ,how to find out which sub query returns more than one row in the following query .This is why smaller, simpler queries are easier to work with than huge ones - when something like this goes wrong smaller queries are much eaiser to debug. Unfortunately using smaller, easier-to-work with queries is not always an option
Ganesh is right - you will have to dissect the big query bit by bit until you find the offending subquery. If there is another way I would like to find out about it too.
The easiest way to do this is probably to use block comments to isolate parts of the query bit by bit until you find the offending part. If you carefully examine the subqueries you might be able to figure out which one is returning multiple rows without commenting everything
Good luck! -
How to catch the return object
this one is my code
private static select(){
String URL = "jdbc:mysql://localhost/Chat";
String username = "root";
String password = "";
Vector result = new Vector();
try {
Class.forName("com.mysql.jdbc.Driver").newInstance();
} catch (Exception e) {
System.out.println("Failed to load MySQL driver.");
Statement stmt = null;
Connection con=null;
try {
con = DriverManager.getConnection(URL,username,password);
stmt = con.createStatement();
ResultSet RS = stmt.executeQuery("SELECT * FROM message;");
while(RS.next()){
String command = RS.getString("command");
String source = RS.getString("source");
String target = RS.getString("target");
String message = RS.getString("message");
String typeuser = RS.getString("typeuser");
String photouser = RS.getString("photouser");
String temp = command+"?"+source+"?"+target+"?"+message+"?"+typeuser+"?"+photouser;
result.addElement(temp);
RS.close();
stmt.close();
con.close();
} catch(SQLException e) {
System.err.println("******SQLException : *******");
while (e != null)
System.out.println("Message : "+e.getMessage());
System.out.println("Etat : "+e.getSQLState());
System.out.println("Code Erreur : "+e.getErrorCode()+"\n");
e = e.getNextException();
return *******?; // what should i write here since i want to catch the value of vector, and use it in somewhere else
}Okay, this method makes no sense. But, if you want it to return a Vector, then it needs to have a return type of Vector.private static Vector select()Then use the return statement as such:return result; // as result is the name of you VectorYou then call the method as such:Vector v = select();I still don't understand the purpose of the method. Why is it static?
Methinks someone needs to go back to basics of Java programming.
Hope that helps, though.
James -
Graphics returning null in one place, but not another.
If you want to compile and run my program.... you can get all the files here:
http://s94182144.onlinehome.us/randomstuff/files.zip
(The main classes you'll need to look at are DrawingCanvas, Trig and GraphEngine)
Here's a visual just in case:
http://s94182144.onlinehome.us/randomstuff/graph.jpg
When I click the "Graph It" button, I'm sending all those variables in the window to another class. Except the method I need to call is passed Graphics g... and thus, I needed to create a graphics variable. But it's returning null.
Here is my code in GraphEngine, which runs when a button is clicked. You'll notice for Graph It... I created a Graphics variable... this returns null. Except you'll also notice I do the same thing for "Clear"... but this works.
NOTE: I was getting mad so I named some methods not so nicely :p .... you may notice they are different in my files.
public void actionPerformed(ActionEvent e)
userDisplay=e.getActionCommand();
if(userDisplay.equals("Draw"))
String progChoice=grapher.graphType.getSelectedItem();
System.out.println(progChoice);
if(progChoice.equals("Lines"))
grapher.allButtons[0].enable();
draw();
else if(progChoice.equals("Scatter Plot"))
lineOfBestFit();
else if(userDisplay.equals("Graph It"))
Trig.graphThisStuff();
Graphics g = canvas.getGraphics();
canvas.trig(g);
else if(userDisplay.equals("Clear"))
Graphics g = canvas.getGraphics();
System.out.println(g);
canvas.clear(g);
else if(userDisplay.equals("Reset"))
Trig.restartThis();
else if(userDisplay.equals("Credits"))
showInstructionsFrame();
else if(userDisplay.equals("Help"))
showHelpFrame();
else if(userDisplay.equals("Create Sinusodial Graph"))
showTrigFrame();1. Do you expect forum members to download and unzip your code? Good luck...
2. Inside almost every "big" problem is a small one trying to get out. Write a minimal program
demonstrating your problem (say <50 lines) and post that. The shorter code and the easier it
is to copy, paste and run, the more forum members will actually give it a go.
That being said, you problem is that you are using Component's getGraphics at all. Don't use it.
It doesn't work very well -- they rendering you do is temporary, if you iconify and restore your
window your changes will disappear (sometimes even moving another window past yours will do this!).
What should you do instead? Put all your rendering code in paintComponent (or subroutines
it calls). Changes in state of your app should trigger a call to repaint (or you will call it directly).
Repainting will eventually cause your paintComponent to be called.
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