Java on button

I have a process that set a specific date against a person when a button is pressed.
I have been trying to insert javascript on the button so a confirmation box with yes or no appears.
I have this working but when yes is pressed the procedure (set_date) that updates the date against the person does not run eventhough I get the actioned processed message. This is the java script.
In the header
<script language="JavaScript" type="text/javascript">
function setdate(msg)
var confdate = msg;
if(confdate ==null)
confdate= confirm("Would you like to set the date?");
else
confdate= confirm(msg);
if (confdate== true)
doSubmit('set_date');
</script>
and on the button
Target is a URL
URL Target
javascript:setban('Would you like to set the date?');
Can anyone spot where I have gone wrong please
Gus

Is it safe to assume you really mean javascript:set_date('Would you like to set the date?')
What I would do to try to debug this is to remove the conditions, and just see if the page is being submitted at all. Work backwards from there - if it doesnt update at all after you push the yes, then something is wrong.
Sorry I'm not a javascript expert, but that would be my advice. Start wide and narrow it down.

Similar Messages

Problem with java swing button and loop

Problem with java swing button and loop
I�m using VAJ 4.0. and I�m doing normal GUI application. I have next problem.
I have in the same class two jswing buttons named start (ivjGStart) and stop (ivjGStop) and private static int field named Status where initial value is 0. This buttons should work something like this:
When I click on start button it must do next:
Start button must set disenabled and Stop button must set enabled and selected. Field status is set to 1, because this is a condition in next procedure in some loop. And then procedure named IzvajajNeprekinjeno() is invoked.
And when I click on stop button it must do next:
Start button must set enabled and selected and Stop button must set disenabled.
Field status is set to 0.
This works everything fine without loop �do .. while� inside the procedure IzvajajNeprekinjeno(). But when used this loop the start button all the time stay (like) pressed. And this means that a can�t stop my loop.
There is java code, so you can get better picture:
/** start button */
public void gStart_ActionEvents() {
try {
ivjGStart.setEnabled(false);
ivjGStop.setEnabled(true);
ivjGStop.setSelected(true);
getJTextPane1().setText("Program is running ...");
Status = 1;
} catch (Exception e) {}
/** stop button */
public void gStop_ActionEvents() {
try {
ivjGStart.setEnabled(true);
ivjGStart.setSelected(true);
ivjGStop.setEnabled(false);
getJTextPane1().setText("Program is NOT running ...");
Status = 0;
} catch (Exception e) {
/** procedure IzvajajNeprekinjeno() */
public void IzvajajNeprekinjeno() { //RunLoop
try {
int zamik = 2000; //delay
do {
Thread.sleep(zamik);
PreberiDat(); //procedure
} while (Status == 1);
} catch (Exception e) {
So, I'm asking what I have to do, that start button will not all the time stay pressed? Or some other aspect of solving this problem.
Any help will be appreciated.
Best regards,
Tomi

This is a multi thread problem. When you start the gui, it is running in one thread. Lets call that GUI_Thread so we know what we are talking about.
Since java is task-based this will happen if you do like this:
1. Button "Start" is pressed. Thread running: GUI_Thread
2. Event gStart_ActionEvents() called. Thread running: GUI_Thread
3. Method IzvajajNeprekinjeno() called. Thread running: GUI_Thread
4. Sleep in method IzvajajNeprekinjeno() on thread GUI_Thread
5. Call PreberiDat(). Thread running: GUI_Thread
6. Check status. If == 1, go tho 4. Thread running: GUI_Thread.
Since the method IzvajajNeprekinjeno() (what does that mean?) and the GUI is running in the same thread and the event that the Start button has thrown isn't done yet, the program will go on in the IzvajajNeprekinjeno() method forever and never let you press the Stop-button.
What you have to do is do put either the GUI in a thread of its own or start a new thread that will do the task of the IzvajajNeprekinjeno() method.
http://java.sun.com/docs/books/tutorial/uiswing/index.html
This tutorial explains how to build a multi threaded gui.
/Lime

Java-style buttons in Oracle Forms 6i

Hey there,
Does anyone know how to create buttons with curved edges in Oracle Forms 6i? Something like those Swing components in Java?
Thanks
Al

Alex,
for Forms on the web you can use PJCs. The Forms 10g demos (http://download.oracle.com/otn/other/general/forms10gdemos9_0_4_2.zip) and the Forms 9i demos have a sample Java class for this. The same solution should work in 6i as well.
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[SOLVED] XFCE - Java Swing button theme?

I'm running XFCE, and I notice that all Swing-based Java applications use the ugly Swing button theme. When I used GNOME 3, some of them would adapt to the GNOME button theme (and would look like they belonged on the system).
Is this issue with XFCE, my current GTK theme (dorian), or Java, and how can I change this?
Last edited by 2mac (2014-01-01 22:17:07)

Thank you for the information.
I followed the wiki by adding
export _JAVA_OPTIONS="-Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel"
to my ~/.bashrc file.
To test, I launched the Minecraft launcher (one of the applications which does support style changes between desktops), and got back this information:
Picked up _JAVA_OPTIONS: -Dswing.defaultlaf=com.sun.java.swing.plaf.gtk.GTKLookAndFeel
Error parsing gtk-icon-sizes string: ''
And it had no effect. Any ideas?
Last edited by 2mac (2013-12-31 16:35:39)

Claculator.java+memory buttons

hey this is my code
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class Calculator extends JApplet implements ActionListener
{     // declare all instances and variables
     JLabel displayLabel,inputLabel;
     JTextField displayBox,inputBox;
     JButton clearButton, addButton,subtButton,multButton,divButton,sqrtButton,sqrButton,recipButton,posnegButton,MSButton,MRButton,MPButton,MCButton;
     double display_total, new_value, mem_value;
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     {     // create and add display box
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            displayBox = new JTextField(12);
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          add(displayBox);
          displayBox.setEditable(false);
          display_total = 0.0;
          displayBox.setText(Double.toString(display_total));
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          inputLabel = new JLabel("Input");
            inputBox = new JTextField(12);
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          add(inputBox);
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          addButton = new JButton(" + ");
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          addButton.addActionListener(this);
          //create and add subtract button
          subtButton = new JButton(" - ");
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          subtButton.addActionListener(this);
          //create and add multiply button
          multButton = new JButton(" * ");
          add(multButton);
          multButton.addActionListener(this);
          //create and add divide button
          divButton = new JButton(" / ");
          add(divButton);
          divButton.addActionListener(this);
          //create and add clear button
          clearButton = new JButton("Clear");
          add(clearButton);
          clearButton.addActionListener(this);
          //create and add square root button
          sqrtButton = new JButton(" SQT ");
          add(sqrtButton);
          sqrtButton.addActionListener(this);
          //create and add square button
          sqrButton = new JButton(" SQR ");
          add(sqrButton);
          sqrButton.addActionListener(this);
          //create and add reciprocate button
          recipButton = new JButton(" 1/X ");
          add(recipButton);
          recipButton.addActionListener(this);
          //create and add reciprocate button
          posnegButton = new JButton(" +/- ");
          add(posnegButton);
          posnegButton.addActionListener(this);
          //create and add memory save button
          MSButton = new JButton(" MS ");
          add(MSButton);
          MSButton.addActionListener(this);
          //create and add memory retreive button
          MRButton = new JButton(" MR ");
          add(MRButton);
          MRButton.addActionListener(this);
          //create and add memory addition button
          MPButton = new JButton(" M+ ");
          add(MPButton);
          MPButton.addActionListener(this);
          //create and add memory clear button
          MCButton = new JButton(" MC ");
          add(MCButton);
          MCButton.addActionListener(this);
     }// init
     public void actionPerformed(ActionEvent event)
     // to respond to clicking on buttons
     {     // to determine which button was clicked
          String arg = event.getActionCommand();
          if (arg.equals("Clear"))     // Clear button clicked
          {     display_total = 0.0;
               displayBox.setText(Double.toString(display_total));
          }//clear
          else     // a new value has been entered
          { try
                  {      new_value = Double.valueOf(inputBox.getText()).doubleValue();
                    showStatus("");
                    if(arg.equals(" + "))     // add button clicked
                         display_total = display_total + new_value;
                    else if (arg.equals(" - "))     // subtract button clicked
                         display_total = display_total - new_value;
                    else if (arg.equals(" * "))     // multiply button clicked
                         display_total = display_total * new_value;
                    else if (arg.equals(" / ")) // divide button clicked
                         display_total = display_total / new_value;
                    else if (arg.equals(" SQT ")) // square root button clicked
                         display_total = Math.sqrt(new_value);
                    else if (arg.equals(" SQR ")) // square button clicked
                         display_total = new_value * new_value;
                    else if (arg.equals(" 1/X ")) // reciprocal button clicked
                         display_total = 1/new_value;
                    else if (arg.equals(" +/- ")) // positive negative button clicked
                         display_total = new_value-(new_value*2);
                    else if (arg.equals(" MS ")) // memory save button clicked
                         mem_value=new_value;
                    else if (arg.equals(" MR ")) // memory retreive button clicked
                         new_value=mem_value;
                    else if (arg.equals(" M+ ")) // memory addition button clicked
                         mem_value=mem_value+new_value;
                    else if (arg.equals(" MC ")) // memory clear button clicked
                         mem_value=0.0;
                    displayBox.setText(Double.toString(display_total));
                    inputBox.setText("");
               }//try
                  catch (NumberFormatException entry)
                  {     showStatus("Error: Invalid Input");
                    inputBox.setText("");
                  }//catch
          }//else
     }//actionPerformed
}//Calculatorit all runs fine unitl the memory buttons, they dont seem to work. when i press the memory retrieve button, i get the invalid input message, and the same message for the m+ and mc buttons. ms seems to work fine, as no error message is displayed. can someone help me fix this please?

This:
else if (arg.equals(" +/- ")) // positive negative button clicked
   display_total = new_value-(new_value*2);should be:
else if (arg.equals(" +/- ")) // positive negative button clicked
   display_total = -new_value;Much clearer as to what it does (and fewer operations, too).
Memory Retrieve and Memory Clear don't need an input--that's probably why you are getting the exception--you are probably parsing an empty string.
As CeciNEstPasUnProgrammeur said, you should print the stack trace.

Newbie here. Moderator PhHein closed my discussion, needed help on finding Java 7 button to click on. Started another discusion and this was one of the answers.

Being new to the site, by accident I put my question about updating something in the wrong spot. I put this question in the topic Community Feedback and Suggestions (Do Not Post Product-Related Questions Here
I posted my question where I throught the Community could give me feedback and suggestions. I am not an IT person, I did not know that upgrading something would be considered writing about a product. Again, I am not a IT person,
instead was a graphic designer so I do not think like IT people. The moderator PhHein closed the thread because of my mistake and no one directed me to the right spot. It is frustrating enough not to be able to update something.
Then I get tossed to the wind by Moderator PhHein.
I started another discussion and was treated so nice, ha. I got bashed by Billy V's, you can see his comment in the Orange type below.
I do not understand the rudeness of the moderators and other posters.
This is my last post and I no longer want help. I won't be updating Java 7. I thought I would get a hello, welcome, and a polite answer. This is not a site that I consider people friendly.
I did not get any response to my reporting what Billy said as abuse. I guess I just wanted to let some people know.
Is this a site where people bash instead of giving you help? L
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
created by BillyVerreynne in Community Feedback and Suggestions (Do Not Post Product-Related Questions Here
"Well, I am very unhappy that you think your time is too valuable to browse through English (clicking HOME on the tab at the top of the page) and find a Java forum for your post about Java..
And instead waste our time by asking a product question in a forum that EXPLICITLY states Do Not Post Product-Related Questions Here."
Perhaps your inability to install Java (finding that shiny install button to click and have fun) is related to your inability to read and comprehend simple instructions? Like NOT posting product questions in this forum space??"

... then you post this stream of unconciousness to the wrong place as well.
Your irritation has no place in this Java programming space.
I suggest you spend more time reading the contents of the web site.
This new post is also locked.

WD Java iView button disappears

Hello All,
We have a Webdynpro Standard iView for ESS/ MSS , we are facing the followig scenario as follows
the iView is getting display in the iView content area in the portal . We have a system tray being enabled , now when we minimise and them maximise the system tray , the button disappears from the screen (when the application is first loaded on the iView the button is displayed ). this prolem is not faced when we refresh the iView by clicking the system tray --> refresh , but only happens on the minimise and maximise action.
Tried to see, if this behaviour can be changed with changing the WD UI settings on the portal side(ctrl + secondary mouse click). but was unable to do so .
Could this be handle without touching the WD code ?
Ronniee

hi
How are you using this iVew ? Have you added this iView to a page or workset ? or are you using this iView by itself ? Which object property have you changed? is it the iView or the page ?
Lemme know the details
and will take it up from there
Sheril

Java script button only works once?

I am a novice with JavaScript, but Edge Animate seems like it might be a tool that I can work with. I have created pages using symbols with simple in/out slide animations using JavaScript. They are triggered on the buttons with the following code:
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if (current != "") {
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sym.getSymbol("testimPg").play("in");
sym.setVariable("current", "testimPg");
The stage action for compositionready is this;
sym.setVariable("current", "baseAnim");
every page works fine except my testimonial page (testimPg)
The animations work fine for all the other buttons but on the testimonial page it only fire correctly once!?
If you click on other pages and then go back to the testimonial button, it no longer functions properly —the symbol is no longer visible when the testimonial button is clicked!?
Can anybody figure out why this is happening.
here is a link to the page:
http://whelanartdesign.com/web/WhelartDesign0714v4.html
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Thanks for the reply kglad. I've deleted all the button layers in every scenes and created a button layer from frame 1 until the last frame, but I still got this output here that I don't really understand what it means.

XP look on Java buttons

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Is there a way to get an XP look on my Java Swing buttons???
Greetings Sven

Refer to this site http://www.l2fprod.com/. There is a LAF supports skins like WinXP appearance.

In Portal (Java Development)

Dear members of hte group
in order to get java development button in EP
what should i install
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plz ans this
regards
satish

this a repeat posting for same question
Java development button
Daniel, In EP6 SP4(WAS 6.4) PDK is installed via SDM. Assign yourself java development role.

Help with getting button color.

I'm trying to make a little paint program. i want to be able to click on a color button and then assign the color of that button to a variable Color brushColor.
funny thing is, when i compile this, it tells me that
C:\java\javaprograms\TryPainting.java:21: getBackground() in java.awt.Component cannot be applied to (java.awt.Button)
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strange, getBackground is explicitly listed as a method that Button inherits from Component in the API.
any suggestions on a way to accomplish this?
thanks in advance,
jason
------code follows-------
import javax.swing.*;
import javax.swing.text.*;
import java.awt.*;
import java.awt.event.*;
//colored buttons of "paint"
class OilPaint extends Button{
Color brushColor = Color.white;
OilPaint(String label, Color color) {
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     setForeground(color);
     setBackground(color);
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     public void actionPerformed(ActionEvent e) {
     Button source = (Button)e.getSource();
     brushColor = getBackground(source);
     public Color paintTheBrush(Color color) {
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// canvas to paint on - this isn't working yet. can't even get the
// setSize to work, though it does compile.
class Canvas extends JPanel{
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// displays the lsit of color button choices in a small panel at bottom
// of window
class ColorChoices extends JPanel{
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          add(new OilPaint("paint",Color.red));
          add(new OilPaint("paint",Color.green));
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          add(new OilPaint("paint",Color.black));
//this is the main class of the program TryPainting.java
class TryPainting {
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          JFrame window = new JFrame();
          Toolkit toolkit = window.getToolkit();
          Dimension winSize=toolkit.getScreenSize();
          window.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          window.setBounds(5,5,winSize.width/2,winSize.height/2);
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          content.setLayout(new BorderLayout());
          content.add("North",new Canvas());
          content.add("South",new ColorChoices());
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duh.. thanks man, that did the trick. i'm pretty new at this. i really appreciate the help. i got stuck thinking of the getBackground() as a function, rather than a method. this oop stuff is wacky weird fun!
jason

How to change object background color on java run time

Hi,
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pls help me? How to run time change object background color?
here follwing code
import com.sun.j3d.loaders.objectfile.ObjectFile;
import com.sun.j3d.loaders.ParsingErrorException;
import com.sun.j3d.loaders.IncorrectFormatException;
import com.sun.j3d.loaders.Scene;
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import com.sun.j3d.utils.applet.MainFrame;
import com.sun.j3d.utils.universe.*;
import javax.media.j3d.*;
import javax.vecmath.*;
import java.io.*;
import com.sun.j3d.utils.behaviors.vp.*;
import java.net.URL;
import java.net.MalformedURLException;
import java.awt.Graphics ;
import javax.swing.*;
public class ObjLoad1 extends Applet implements ActionListener
private boolean spin = false;
private boolean noTriangulate = false;
private boolean noStripify = false;
private double creaseAngle = 60.0;
private URL filename = null;
private SimpleUniverse u;
private BoundingSphere bounds;
private Panel cardPanel;
private Button Tit,sub;
private CardLayout ourLayout;
private BorderLayout bl;
Background bgNode;
BranchGroup objRoot;
List thelist;
Label l1;
public BranchGroup createSceneGraph()
BranchGroup objRoot = new BranchGroup();
TransformGroup objScale = new TransformGroup();
Transform3D t3d = new Transform3D();
t3d.setScale(0.7);
objScale.setTransform(t3d);
objRoot.addChild(objScale);
TransformGroup objTrans = new TransformGroup();
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_WRITE);
objTrans.setCapability(TransformGroup.ALLOW_TRANSFORM_READ);
objScale.addChild(objTrans);
int flags = ObjectFile.RESIZE;
if (!noTriangulate) flags |= ObjectFile.TRIANGULATE;
if (!noStripify) flags |= ObjectFile.STRIPIFY;
ObjectFile f = new ObjectFile(flags,(float)(creaseAngle * Math.PI / 180.0));
Scene s = null;
     try {
          s = f.load(filename);
     catch (FileNotFoundException e) {
     System.err.println(e);
     System.exit(1);
     catch (ParsingErrorException e) {
     System.err.println(e);
     System.exit(1);
     catch (IncorrectFormatException e) {
     System.err.println(e);
     System.exit(1);
     objTrans.addChild(s.getSceneGroup());
     bounds = new BoundingSphere(new Point3d(0.0,0.0,0.0), 100.0);
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Color3f bgColor = new Color3f(100,200,230);
bgNode = new Background(bgColor);
bgNode.setApplicationBounds(bounds);
objRoot.addChild(bgNode);
return objRoot;
private void usage()
System.out.println("Usage: java ObjLoad1 [-s] [-n] [-t] [-c degrees] <.obj file>");
System.out.println("-s Spin (no user interaction)");
System.out.println("-n No triangulation");
System.out.println("-t No stripification");
System.out.println("-c Set crease angle for normal generation (default is 60 without");
System.out.println("smoothing group info, otherwise 180 within smoothing groups)");
System.exit(0);
} // End of usage
public void init() {
if (filename == null) {
try {
URL path = getCodeBase();
filename = new URL(path.toString() + "./galleon.obj");
catch (MalformedURLException e) {
     System.err.println(e);
     System.exit(1);
     //setLayout(new BorderLayout());
     //setLayout(new GridLayout(5,0));
     //setLayout(new CardLayout());
     //setLayout(new FlowLayout(FlowLayout.LEFT, 5, 5));
GraphicsConfiguration config = SimpleUniverse.getPreferredConfiguration();
Canvas3D c = new Canvas3D(config);
add(c);
BranchGroup scene = createSceneGraph();
u = new SimpleUniverse(c);
ViewingPlatform viewingPlatform = u.getViewingPlatform();
PlatformGeometry pg = new PlatformGeometry();
Color3f ambientColor = new Color3f(45,27,15);
AmbientLight ambientLightNode = new AmbientLight(ambientColor);
ambientLightNode.setInfluencingBounds(bounds);
pg.addChild(ambientLightNode);
Color3f light1Color = new Color3f(111,222,222);
Vector3f light1Direction = new Vector3f(1.0f, 1.0f, 1.0f);
Color3f light2Color = new Color3f(1.0f, 1.0f, 1.0f);
Vector3f light2Direction = new Vector3f(-1.0f, -1.0f, -1.0f);
DirectionalLight light1 = new DirectionalLight(light1Color, light1Direction);
light1.setInfluencingBounds(bounds);
pg.addChild(light1);
DirectionalLight light2 = new DirectionalLight(light2Color, light2Direction);
light2.setInfluencingBounds(bounds);
pg.addChild(light2);
viewingPlatform.setPlatformGeometry(pg);
viewingPlatform.setNominalViewingTransform();
if (!spin) {
OrbitBehavior orbit = new OrbitBehavior(c,OrbitBehavior.REVERSE_ALL);
BoundingSphere bounds = new BoundingSphere(new Point3d(0.0, 0.0, 0.0), 100.0);
orbit.setSchedulingBounds(bounds);
viewingPlatform.setViewPlatformBehavior(orbit);
u.addBranchGraph(scene);
     public ObjLoad1(String[] args) {
          if (args.length != 0) {
               for (int i = 0 ; i < args.length ; i++) {
                    if (args.startsWith("-")) {
                         if (args[i].equals("-s")) {
                              spin = true;
                         } else if (args[i].equals("-n")) {
                              noTriangulate = true;
                         } else if (args[i].equals("-t")) {
                              noStripify = true;
                         } else if (args[i].equals("-c")) {
                              if (i < args.length - 1) {
                                   creaseAngle = (new Double(args[++i])).doubleValue();
                              } else usage();
                         } else {
                              usage();
                    } else {
                         try {
                              if ((args[i].indexOf("file:") == 0) ||
                                        (args[i].indexOf("http") == 0)) {
                                   filename = new URL(args[i]);
                              else if (args[i].charAt(0) != '/') {
                                   filename = new URL("file:./" + args[i]);
                              else {
                                   filename = new URL("file:" + args[i]);
                         catch (MalformedURLException e) {
                              System.err.println(e);
                              System.exit(1);
public void actionPerformed(ActionEvent e)
     if (e.getSource() == Tit)
//Color Picker tool
          Color c1 = JColorChooser.showDialog(((Component)e.getSource()).getParent(),"Zaxis Color Picker", Color.blue);
          cardPanel.setBackground(c1);
          objRoot.removeChild(bgNode);
          int a = c1.getRed();
          int b = c1.getBlue();
          int c = c1.getBlue();
          System.out.println(a);
          System.out.println(b);
          System.out.println(c);
          Color3f ccc = new Color3f(a,b,c);
          bgNode.setApplicationBounds(bounds);
     objRoot.addChild(bgNode);
     else
          System.out.println("mathi");
public ObjLoad1()
Tit = new Button("BG Color");
sub = new Button("Object Color");
cardPanel = new Panel();
cardPanel.add(Tit);
cardPanel.add(sub);
//cardPanel.add(l1);
//cardPanel.add(thelist);
sub.addActionListener(this);
Tit.addActionListener(this);
// thelist.addActionListener(this);
//setLayout for applet to be BorderLayout
this.setLayout(new BorderLayout());
//button Panel goes South, card panels go Center
this.add(cardPanel, BorderLayout.SOUTH);
//this.add(cardPanel, BorderLayout.CENTER);
this.setVisible(true);
public void destroy() {
public static void main(String[] args) {
     new MainFrame(new ObjLoad1(args),400, 400);

hi,
i am using setColor(Color3f color) method
like
if (e.getSource() == Tit)
          Color c1 = JColorChooser.showDialog(((Component)e.getSource()).getParent(),"Zaxis Color Picker", Color.blue);
          bgColor = new Color3f(c1);
          System.out.println(bgColor.get());
     bgNode.setColor(bgColor);
     bgNode.setApplicationBounds(bounds);
     objRoot.addChild(bgNode);
but error will be displayed
like
javax.media.j3d.CapabilityNotSetException: Background: no capability to set color
     at javax.media.j3d.Background.setColor(Background.java:307)
     at ObjLoad1.actionPerformed(ObjLoad1.java:230)
     at java.awt.Button.processActionEvent(Unknown Source)
     at java.awt.Button.processEvent(Unknown Source)
     at java.awt.Component.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)
pls help me

Problem while calling java function from html

when i tried to call a java function from html i'm getting an error
object don't support this property.
what could be the reason.
This is my html.
I got this from this forum only.
My applet is accessing the system property "user.home".
I ran it in IE
<DIV id="dvObjectHolder">Applet comes here</DIV>
<br><br>
<script>
if(window.navigator.appName.toLowerCase().indexOf("netscape")!=-1){ // set object for Netscape:
     document.getElementById('dvObjectHolder').innerHTML = " <object ID='appletTest1' classid=\"java:test.class\"" +
"height=\"0\" width=\"0\" onError=\"changeObject();\"" +
          ">" +
"<param name=\"mayscript\" value=\"Y\">" +
"<param name=\"archive\" value=\"sTest.jar\">" +
"</object>";
}else if(window.navigator.appName.toLowerCase().indexOf('internet explorer')!=-1){ //set object for IE
     document.getElementById('dvObjectHolder').innerHTML = "<object ID='appletTest1' classid=\"clsid:8AD9C840-044E-11D1-B3E9-00805F499D93\"" +
          " height=\"0\" width=\"0\" >" +
          " <param name=\"code\" value=\"test.class\" />" +
     "<param name=\"archive\" value=\"sTest.jar\">" +
          " </object>"
</script>
<LABEL id="lblOutputText">This text will be replaced by the applet</LABEL>
<BR>
<input value="Javascript to java" type=button onClick="document.appletTest1.fromJavaScript()">

I tried this example using the repy given to an earlier post.
But its not working with me.
What i did in addition was adding plugin.jar to classpath to import netscape.javascript.*;
Let me add some more details
1) I'll add the stack trace
2) my java progrma
3) batch file to sign the applet.
1) This is the stack trace i don't know whether u will undertand this
load: class test.class not found.
java.lang.ClassNotFoundException: test.class
     at sun.applet.AppletClassLoader.findClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadClass(Unknown Source)
     at java.lang.ClassLoader.loadClass(Unknown Source)
     at sun.applet.AppletClassLoader.loadCode(Unknown Source)
     at sun.applet.AppletPanel.createApplet(Unknown Source)
     at sun.plugin.AppletViewer.createApplet(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: java.io.FileNotFoundException: C:\FastranJava\AppletObject\bin\test\class.class (The system cannot find the path specified)
     at java.io.FileInputStream.open(Native Method)
     at java.io.FileInputStream.<init>(Unknown Source)
     at java.io.FileInputStream.<init>(Unknown Source)
     at sun.net.www.protocol.file.FileURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.file.FileURLConnection.getInputStream(Unknown Source)
     at sun.applet.AppletClassLoader.getBytes(Unknown Source)
     at sun.applet.AppletClassLoader.access$100(Unknown Source)
     at sun.applet.AppletClassLoader$1.run(Unknown Source)
     at java.security.AccessController.doPrivileged(Native Method)
     ... 10 more
Exception in thread "Thread-5" java.lang.NullPointerException
     at sun.plugin.util.GrayBoxPainter.showLoadingError(Unknown Source)
     at sun.plugin.AppletViewer.showAppletException(Unknown Source)
     at sun.applet.AppletPanel.runLoader(Unknown Source)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
2) Java Program
import netscape.javascript.*;
import java.applet.*;
public class test extends Applet
     private JSObject win;
     private JSObject outputLabel;
     private boolean buttonFromJavaClicked=false;
     checkJavaScriptEvent evt=new checkJavaScriptEvent();
     public void init()
          try
               evt.start();
               win=JSObject.getWindow(this);
               outputLabel=(JSObject)win.eval("document.getElementById('lblOutputText')");
               outputLabel.setMember("innerHTML", "<center><h1>From Init<br>Your Home directory" + System.getProperty("user.home") + "</h1></center>");
          catch(Exception e)
               e.printStackTrace();
     public void fromJavaScript()
          buttonFromJavaClicked=true;
     public void fromJavaScript2()
          System.out.println("Started Form JavaScript2");
          try
               String strLbl="<center><h1>From JavaScript<br>Your Homedir:" + System.getProperty("user.home") + "</h1></center>";
               outputLabel.setMember("innerHTML", strLbl);
          catch(Exception e)
               e.printStackTrace();
     class checkJavaScriptEvent extends Thread
          public void run()
               while(true)
                    if(test.this.buttonFromJavaClicked)
                         System.out.println("OK buttonfromjava is true");
                         test.this.buttonFromJavaClicked=false;
                         fromJavaScript2();
                    try
                         Thread.sleep(3000);
                    catch(Exception e)
                         e.printStackTrace();
3) Batch file
del *.cer
del *.com
del *.jar
del *.class
javac -classpath ".;C:\Program Files\Java\jre1.5.0_06\lib\plugin.jar" test.java
keytool -genkey -keystore harm.com -keyalg rsa -dname "CN=Harm Meijer, OU=Technology, O=org, L=Amsterdam, ST=, C=NL" -alias harm -validity 3600 -keypass password -storepass password
jar cf0 test.jar *.class
jarsigner -keystore harm.com -storepass password -keypass password -signedjar sTest.jar test.jar harm
del *.class

Java programming(import statement)

My query is that what if i import whole package instead of one class being used in my code.
eg.
if i need " java.awt.Button" in my program code
and my import statement is
import java.awt.*;
will it be reduce execution performance of my program?
or it will reduce only Complie time performance?

Only the compile time performance. All the import statement does is tells the compiler it can use the classes. Try importing a whole swathe of classes into a small program and see what I mean. The resulting class file doesn't bloat.

Executing UNIX command in Java

I am having problems executing a command in Java. Here's the code I have for executing:
Process p = Runtime.getRuntime().exec(cmd);
                                        BufferedReader input = new BufferedReader(new InputStreamReader(p.getInputStream()));
     while((display = input.readLine()) != null)
                         num_1 = Double.parseDouble(display);
                         percent = (num_1 * 100) / (50000000);
                    flip = 1;
                    catch(IOException e)
                    e.printStackTrace();
                    System.exit(1);
Now, when I run the script, I receive the following errors:
Exception occurred during event dispatching:
java.security.AccessControlException: access denied (java.io.FilePermission /Netadmin/UCDSNMP/bin/snmpdelta execute)
at java.lang.Throwable.fillInStackTrace(Native Method)
at java.lang.Throwable.fillInStackTrace(Compiled Code)
at java.lang.Throwable.<init>(Compiled Code)
at java.lang.Exception.<init>(Compiled Code)
at java.lang.RuntimeException.<init>(RuntimeException.java:47)
at java.lang.SecurityException.<init>(SecurityException.java:39)
at java.security.AccessControlException.<init>(AccessControlException.java:57)
at java.security.AccessControlContext.checkPermission(Compiled Code)
at java.security.AccessController.checkPermission(Compiled Code)
at java.lang.SecurityManager.checkPermission(Compiled Code)
at java.lang.SecurityManager.checkExec(SecurityManager.java:789)
at java.lang.Runtime.exec(Compiled Code)
at java.lang.Runtime.exec(Compiled Code)
at java.lang.Runtime.exec(Runtime.java:152)
at snmp.actionPerformed(Compiled Code)
at java.awt.Button.processActionEvent(Button.java:308)
at java.awt.Button.processEvent(Button.java:281)
at java.awt.Component.dispatchEventImpl(Compiled Code)
at java.awt.Component.dispatchEvent(Compiled Code)
at java.awt.EventQueue.dispatchEvent(Compiled Code)
at java.awt.EventDispatchThread.pumpOneEvent(Compiled Code)
at java.awt.EventDispatchThread.pumpEvents(Compiled Code)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:83)
The user is entering the parameters for the UNIX command from a Java applet. Everything looks right, but I can't seem to run the file? Please help! All is appreciated.
Jason Banks
Northeastern University

Sorry, this is a bug that I've reported -- see Sun's response and my original report (along with how to get around the problem) shown below:
Hi Vira Van.,
The bug you have reported is a duplicate of Bug ID: 4522533.
Thank you for providing us with additional information
that can be used in the resolution of this bug.
This bug can be monitored via the the Java Developer
Connection Bug Parade at:
http://developer.java.sun.com/developer/bugParade/index.jshtml
The Java Developer Connection is a free channel that is
maintained by staff here at Sun. Access this web page to join:
http://developer.java.sun.com/servlet/RegistrationServlet
The home page for the JDC is:
http://java.sun.com/jdc
Regards,
Girish
----------------- Original Bug Report-------------------
category : java
release : 1.4
subcategory : jar
type : bug
synopsis : signed applet: bad major version number on NN4.79 and ClassNotFound in IE5.5
description : FULL PRODUCT VERSION :
java version "1.4.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.4.0-b92)
Java HotSpot(TM) Client VM (build 1.4.0-b92, mixed mode)
FULL OPERATING SYSTEM VERSION : Windows 98 [Version
4.10.2222]
ADDITIONAL OPERATING SYSTEMS :
BROWSERS: Netscape Navigator 4.79
        : Internet Explorer 5.5
EXTRA RELEVANT SYSTEM CONFIGURATION :
Applet failed to start in Netscape, the following error
message appeared in the Java Console:
Netscape Communications Corporation -- Java 1.1.5
Type '?' for options.
Symantec Java! ByteCode Compiler Version 210.065
Copyright (C) 1996-97 Symantec Corporation
# Applet exception: error: java.lang.ClassFormatError: Bad
major version number
java.lang.ClassFormatError: Bad major version number
at java.lang.ClassLoader.defineClass(Compiled Code)
at netscape.applet.AppletClassLoader.findClass(Compiled
Code)
at netscape.applet.AppletClassLoader.loadClass1(Compiled
Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled
Code)
at netscape.applet.AppletClassLoader.loadClass(Compiled
Code)
at
netscape.applet.DerivedAppletFrame$LoadAppletEvent.dispatch(
Compiled Code)
at
java.awt.EventDispatchThread$EventPump.dispatchEvents(Compil
ed Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at
netscape.applet.DerivedAppletFrame$AppletEventDispatchThread
.run(Compiled Code)
The same applet
A DESCRIPTION OF THE PROBLEM :
Unable to run signed applet with Netscape 4.79 and IE5.5
native JVM.
REGRESSION. Last worked in version 1.3.1
STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
1.compile program and copy class files to a temp directory
2.sign the applet for Netscape as follows:
signtool -k aok -d \progra~1\netscape\users\viravan -Z
FIO.jar temp
3.sign the applet for Internet Explorer as follows:
cabarc -p n FileIO.cab FileIO*.class
setreg 1 true
makecert -sk aok -n "CN=aok" aok.cer
cert2spc aok.cer aok.spc
signcode -j javasign.dll -jp LOWX -spc aok.spc -k aok
FileIO.cab
Run the applet with the following HTML file:
<html><head><Title>Self-Signed Applet</Title>
<script>
document.layers ? parm=1 : parm=0;
</script>
<body>
This file I/O applet lets you read and write to the user's
local disk.<br>
<br>
<script>
document.writeln('<APPLET CODE = "FileIO" CODEBASE = "."
ARCHIVE = "FIO.jar" WIDTH = 10 HEIGHT = 10 NAME = "JSF">');
document.writeln('<param name="Netscape"
value="'+parm+'">');
document.writeln('<param name="cabbase"
value="FileIO.cab">');
document.writeln('</APPLET>');
</script>
</body>
</html>
EXPECTED VERSUS ACTUAL BEHAVIOR :
A frame with a textarea and some buttons should popup in the
center of the screen.
ERROR MESSAGES/STACK TRACES THAT OCCUR :
Applet signed with signtool failed to start in Netscape, the following error
message appeared in the Java Console:
Netscape Communications Corporation -- Java 1.1.5
Type '?' for options.
Symantec Java! ByteCode Compiler Version 210.065
Copyright (C) 1996-97 Symantec Corporation
# Applet exception: error: java.lang.ClassFormatError: Bad major version number
java.lang.ClassFormatError: Bad major version number
at java.lang.ClassLoader.defineClass(Compiled Code)
at netscape.applet.AppletClassLoader.findClass(Compiled Code)
at netscape.applet.AppletClassLoader.loadClass1(Compiled Code)
* at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
at netscape.applet.AppletClassLoader.loadClass(Compiled Code)
at netscape.applet.DerivedAppletFrame$LoadAppletEvent.dispatch(Compiled Code)
at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled
Code)
The same applet signed with signcode failed to start in Internet explorer, the
error message in the Java Console is:
Error loading class: FileIO
java.lang.NoClassDefFoundError
java.lang.ClassNotFoundException: FileIO
        at com/ms/vm/loader/URLClassLoader.loadClass
        at com/ms/vm/loader/URLClassLoader.loadClass
        at com/ms/applet/AppletPanel.securedClassLoad
        at com/ms/applet/AppletPanel.processSentEvent
        at com/ms/applet/AppletPanel.processSentEvent
        at com/ms/applet/AppletPanel.run
        at java/lang/Thread.run
This bug can be reproduced always.
---------- BEGIN SOURCE ----------
import java.io.*;
import java.util.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
public class FileIO extends Applet implements ActionListener {
   public static void main(String[] args) {
      new FileIO();
      F.addWindowListener(new WindowAdapter() {
         public void windowClosing(WindowEvent e) {
            System.exit(0);
   public void init() {
      String tmp=getParameter("Netscape");
      if (tmp!=null) {
         if (tmp.equals("1")) {
            try {
netscape.security.PrivilegeManager.enablePrivilege("UniversalFileAccess");
               NS=true;
            } catch (Throwable exception) {}
      new FileIO();
      F.setResizable(false);
   public void stop() {
      F.dispose();
   public FileIO() {
      newline=System.getProperty("line.separator");
      F.setLayout(new BorderLayout(0,0));
      String line,inbuf="";
      String newline=System.getProperty("line.separator");
      text=new TextArea(inbuf,24,80,TextArea.SCROLLBARS_BOTH);
      text.setFont(new Font("Courier",Font.PLAIN,12));
      text.setBackground(Color.cyan);
      text.setForeground(Color.black);
      F.add("Center",text);
      Panel pan=new Panel();
      pan.setLayout(new FlowLayout(1,0,0));
      pan.setBackground(Color.yellow);
      TF=new TextField(40);
      TF.setFont(new Font("Courier",Font.PLAIN,12));
      pan.add(TF);
      OP=new Button("Open");
      OP.addActionListener(this);
      pan.add(OP);
      FS=new Button("Save");
      FS.addActionListener(this);
      pan.add(FS);
      SA=new Button("Save-As");
      SA.addActionListener(this);
      pan.add(SA);
      reset=new Button("Reset");
      reset.addActionListener(this);
      pan.add(reset);
      F.add("South",pan);
      F.pack();
      Dimension screen=Toolkit.getDefaultToolkit().getScreenSize();
      Dimension size=F.getSize();
      int X=(screen.width-size.width)/2;
      int Y=(screen.height-size.height)/2;
      F.setLocation(X,Y);
      F.setVisible(true);
   public void actionPerformed(ActionEvent event) {
      String tmp="";
      String O=text.getText();
      StringTokenizer tkn=new StringTokenizer(O,newline);
      int ntkn=tkn.countTokens();
      Object ev=event.getSource();
      if (ev.equals(OP)) {
         FileDialog fd=new FileDialog(F,"File to open",FileDialog.LOAD);
         fd.setFile("*.java");
         fd.show();
         tmp=fd.getDirectory();
         if (fd.getFile()==null) {text.requestFocus(); return;}
         tmp+=fd.getFile();
         TF.setText(tmp);
         try {
            if (NS)
{netscape.security.PrivilegeManager.enablePrivilege("UniversalFileRead");}
            BufferedReader reader=new BufferedReader(new FileReader(tmp));
            String line;
            String crlf="";
            tmp="";
            while ((line=reader.readLine())!=null) {
               tmp+=crlf+line;
               crlf="\n";
            reader.close();
            text.setText(tmp);
         } catch (Throwable e) {
            e.printStackTrace();
      } else if (ev.equals(FS) || ev.equals(SA)) {
         try {
            if (ev.equals(SA)) {
               FileDialog fd=new FileDialog(F,"File to save",FileDialog.SAVE);
               fd.setFile("*.java");
               fd.show();
               tmp=fd.getDirectory();
               tmp+=fd.getFile();
            } else {
               tmp=TF.getText();
            if (tmp.length()==0) {text.requestFocus(); return;}
            if (tmp.indexOf(".java")<0) tmp+=".java";
            TF.setText(tmp);
            if (NS)
{netscape.security.PrivilegeManager.enablePrivilege("UniversalFileWrite");}
            FileOutputStream fos=new FileOutputStream(tmp);
            BufferedWriter out=new BufferedWriter(new OutputStreamWriter(new
DataOutputStream(fos)));
            for (int i=0;i<ntkn;i++) out.write(tkn.nextToken()+newline);
            out.flush();
            out.close();
            if (NS)
{netscape.security.PrivilegeManager.revertPrivilege("UniversalFileWrite");}
            System.out.println(tmp+" saved");
         } catch (Throwable e) {
            e.printStackTrace();
      } else if (ev.equals(reset)) {
         text.setText("");
         TF.setText("");
      text.requestFocus();
   private String replace(String input, String srch, String repl) {
      int i=input.indexOf(srch);
      while (i>=0) {
         input=input.substring(0,i)+repl+input.substring(i+srch.length());
         i=input.indexOf(srch);
      return input;
   private Button OP,FS,SA,reset,TB;
   private boolean newLine,NS=false;
   private TextArea text;
   private TextField TF;
   private final char NL='\n';
   private String content,newline;
   private static Frame F=new Frame("FileIO");
---------- END SOURCE ----------
CUSTOMER WORKAROUND :
build the signed applet with SDK1.3.1 or make it a signed
applet that uses Java Plugin 1.4.0 (i.e., sign it with jarsigner).
workaround :
suggested_val :
cust_name : Vira Van.
dateCreated : 2002-03-24 19:52:18.4
dateEvaluated : 2002-04-01 18:48:10.858

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