Missing some JButton action events

I have a GUI with multiple windows and a number of buttons and a JTable and various other things (a nontrivial application). Some button presses (perhaps 10% of the time) appear to be recognized by the OS (Windows XP) because the button color changes briefly, yet no ActionEvent is delivered to my actionPerformed() handler. Things work properly the other 90% of the time.
This has occurred with Java 1.4 and 1.5.
Any ideas why some of the events are getting lost?

For debug, the first thing I do in actionPerformed is "Toolkit.getDefaultToolkit().beep()", so that I know when an event is generated.
No uncaught exceptions show up on the console, and all of my exception handling-code would also print something, so exceptions are not occurring.

Similar Messages

Question related to JButton action event

Hi All,
In my application a small issue has poppedup i.e. i am giving a JButton with an action and with that action a .bat file is getting generated and immediately i am making it to get executed by using the runtime class.Now my question is if i keep on firing the same button for 20 times same batch file is getting executed for 20 times.SO i want to control that process something like once the execution is done i need to have an acknowledgement so that i will be getting a chance to fire in the next.
After first click on the JButton second click should not process anything till the first execution is done.
How is it possoible to implement this??
Any help appreciated.
regards,
Viswanadh

Hi Camic and Andre,
Thanks for the replies i will try out in both the ways and get back to you people.
And camic as you were saying to go through Process class i have seen and immediately got a question.When i disable the JButton is it a right way that me getting the exitValue of the Process soemthing like
Process p;
if ( p.exitValue()==0){
JButton.setEnabled(true) /enabling button
}Is this the right way to do???
regards,
Viswanadh

Please help me with some action event buttons

{color:#ff6600}i am trying to figure out how to capture two values from an action event button. i have already tried it 6 times and i cant figure it out.
Its a simple calculator with numbers 1 and 2 and does a multiplication calculation.
Can you help me figure it out it will be really helpful.
{color}
import javax.swing.*;
import java.util.*;
import java.awt.event.*;
public class Calculator implements ActionListener {
JFrame frame;
JPanel contentpane;
JButton one,two;
JTextField field;
JButton mult;
JButton adds;
JButton equals;
JButton go;
public Calculator() {
frame = new JFrame ("Calculator" );
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
contentpane = new JPanel();
contentpane.setBorder(BorderFactory.createEmptyBorder(20,20,40,40));
one = new JButton( Integer.toString(1));
one.setActionCommand(Integer.toString(1));
one.addActionListener(this);
contentpane.add(one);
two = new JButton(Integer.toString(2));
two.setActionCommand(Integer.toString(2));
two.addActionListener(this);
contentpane.add(two);
field = new JTextField(10 );
contentpane.add(field);
go = new JButton("calculate");
go.setActionCommand("go");
go.addActionListener(this);
contentpane.add(go);
mult = new JButton( "*");
mult.setActionCommand("mult");
mult.addActionListener(this);
contentpane.add(mult);
adds = new JButton( "+");
adds.setActionCommand("add");
contentpane.add(adds);
frame.setContentPane(contentpane);
frame.pack();
frame.setVisible(true);
public void actionPerformed (ActionEvent event ) {
String eventn = event.getActionCommand();
String text = field.getText();
String mult ="*";
{color:#800080}if (eventn.equals("1")||eventn.equals("2") ){ \\ *{color:#ff6600}i dont know how to store two different value from an action event{color}*
text+=eventn ;
int num = Integer.parseInt(text);
field.setText(text);
{color}
{color:#800080}if (eventn.equalsIgnoreCase("mult")){
field.setText("");
{color}
{color:#800080}};
{color}
public static void runGui(){
JFrame.setDefaultLookAndFeelDecorated(true);
Calculator r = new Calculator();
public static void main (String[]args){
javax.swing.SwingUtilities.invokeLater(new Runnable(){
public void run(){
runGui();

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ListenerDemo {
    private class DigitListener implements ActionListener {
       private int digit;
       public DigitListener(int digit) {
           this.digit = digit;
       public void actionPerformed(ActionEvent evt) {
            JOptionPane.showMessageDialog(f, "You pressed " + digit);
    private JFrame f = new JFrame();
    private JButton button1 = new JButton("1");
    private JButton button2 = new JButton("2");
    public static void main(String[] args) {
        EventQueue.invokeLater(new Runnable(){
            public void run() {
                new ListenerDemo().go();
    void go() {
        button1.addActionListener(new DigitListener(1));
        button2.addActionListener(new DigitListener(2));
        JPanel cp = new JPanel();
        cp.add(button1);
        cp.add(button2);
        f.setContentPane(cp);
        f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        f.pack();
        f.setLocationRelativeTo(null);
        f.setVisible(true);
}

How do I retain Jbutton text for action event & set img icon on Jbutton

I need to retain the text on my button as I use this to identify the action event in actionPerformed method when the button is pressed.
Hoe do I add an image icon to the Jbutton without effecting this?
[/b]
class CalcPanel extends JPanel
    implements ActionListener, CurrencyVals
//currency panel data members
    JButton[] cb = new JButton[4];
JPanel cbkeys = new JPanel(new GridLayout(4,1));
//Toolkit tk = Toolkit.getDefaultToolkit();
    //Image img = tk.getImage("D:/temp/ausflag.jpg");
public CalcPanel(){
ImageIcon b = new ImageIcon("D:/temp/ausflag.jpg","AUS");
    cb[AUS]= new JButton(b); //cb[AUS]= new JButton("AUS");
      cbkeys.add(cb[AUS]);
      cb[AUS].addActionListener(this);
setLayout(new BorderLayout());
    add(display, BorderLayout.NORTH);
    add(keys, BorderLayout.CENTER);
    add(cbkeys, BorderLayout.EAST);
    add(label, BorderLayout.SOUTH);
    public void actionPerformed(ActionEvent evt){
      Object source = evt.getSource();
      int id;
      if (keyBoard) {
        if (source instanceof JButton) {
          String s = ((JButton)source).getText();
[/b]Regards
Synfield

if(keyBoard) { ??! [/b]... do have cause to feel flattered?
Copy and paste this and save a small eg;- 25px high x 50px wide Jpeg image in the same file and call it "new.jpg", then study it, this posted program (again?) to see where your code went astray.
THEN, figure out what you want to do with your code ...keep at it!
Sue x
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class ButtonIcon extends JFrame implements ActionListener {
String []str ={"abc","def","ghi","jkl","mno","pqr","st","uvw"};
JButton b[] = new JButton[str.length];
   JButton on = new JButton("ON");
   JButton off = new JButton("OFF");
   JButton picture;
   JPanel panel;
   String str2="";
   Font font = new Font("Comic Sans MS" ,0, 14);
   boolean keyBoard;
   ImageIcon icon = new ImageIcon("new.jpg");
public ButtonIcon(){
   Container c = getContentPane();
   panel = new JPanel();
   panel.setLayout(new FlowLayout());
   picture = new JButton(icon);
   for (int j=0; j<=str.length-1; j++){
         b[j]= new JButton(str[j]);
         b[j].setFont(font);
         panel.add(b[j]);
         b[j].addActionListener(this);
   on.addActionListener(this);
   off.addActionListener(this);
   panel.add(on);
   panel.add(off);
   panel.add(picture);
   c.add(panel);
   public void paint (Graphics g) {
      super.paint (g);
      Graphics2D G = (Graphics2D) g;
      G.setColor(Color.red);
      G.setFont(font);
      G.drawString(str2, 25, 150);
public void actionPerformed(ActionEvent evt){
    String command = evt.getActionCommand();
    if (keyBoard) {
       if (evt.getSource() instanceof JButton ) {
           str2 += command;
       if (evt.getActionCommand().equals("OFF")) str2 = "";
    if(command.equals("ON")) keyBoard = true;
    if(command.equals("OFF")) keyBoard = false;
repaint();
public static void main (String []args){
   ButtonIcon boo = new ButtonIcon();
   boo.setSize(300,200);
   boo.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE );
   boo.setVisible(true);

Missing Action Event from Custom Component

Hi JSF Gurus,
I have two custom components, both extends UICommand and have their
own renderers. I use them on two seperate pages, say component1 on
page1 and component2 on page2. And page2 is include inside page2.
I registered an action listener on component2. When the composite page
is rendered, I clicked on component2. However, the registered action
listener was not invoked. Inside the debugging (I'm using IntelliJ
IDEA 5.0) I set a breakpoint inside the decode method of Renderer2
(renderer for component2). I do see the componen2 actually as an
actionLister method binding being set to correct value. I do queue the
new action event to component2 at the end of the decode method. But
the action listerner never invoke.
Any idea what did I miss?
Thanks,
Edmond

Hi Yuki,
Yeah, after I turn on detail JSF debugging as instructed by the book Core JavaServer Faces, I figured out I had a validation error. That solves the mystery.
Thanks,
Edmond

Dynamic events miss some events

I use an event structure in LabVIEW 7.1.1 that's driven by dynamic events. Sometime, the structure misses 10% of events happened on a control. Beside that, the structure works well. Initialization of the event register is made by a constant and unregistered at the end of the VI. Anybody has expected that kind of problem?
Thanks
Eric

Can you post an example or does this only happen in a certain VI?
How do you know that the event structure is missing 10% of the events?
Try to take over the world!

How to set fire action event for particular rows in a table

HI All,
I have a requirement in which I want to set fire action event for particular rows in a table based on some condition.
The table has columns like fullname,employee id etc.
So i want to set fire action event for particulars rows only which will saisfy some condition.

Atanu,
Your approach(setting fire action for few rows) seems not possible. Better to go ahead with workaround.
Do you want this functionality in processRequest(while page loading) or processFromRequest(on some event) method ? Give more explanation regd. your requirement ?
In either case loop through the rows and when your condition is met write the action to be performed in controller.
Regards,
Anand

MVC �Best Practice� (handling multiple views per action/event)

Looking for the best approach for handling multiple views for one action/event class? Background: I have a small application using a basic MVC model, one controller servlet, multiple event classes, and multiple JSP views. For performance reasons, the controller Servlet is loaded once, and each event class is an instance within it. Each event has an �eventProcess()� and an �eventForward()� method called by the controller, standard stuff.
However, because event classes should not use instance variables, how should I communicate which view to forward to should based upon eventProcess() logic (e.g. if error, error.jsp, if success, success.sjp)? Currently, there is only one view mapped per event, and I'm having to put error handling logic in the JSP, which goes against the JSP being for just view only.
My though was 1) A session object/variable that the eventProcess() sets, and the eventForward() reads, or 2) Have eventProcess() return a mapping key and have the conroller lookup a view page based upon that key, as opposed to 1-1 event/view mapping.
Would like your thoughts!
Thanks
bRi

Your solution seems ok to me, but maybe the Struts framework from Apache
that implements MVC for JSP is a better solution for you:
http://jakarta.apache.org/struts/index.html
You should take a look at it. It has in addition some useful taglibs that makes life much easier.
We have successfully used it in a project with about 50 pages.

Has anyone encountered problem with VIRSA_CC_ACTUSAGE missing some data?

Has anyone encountered a problem where the VIRSA_CC_ACTUSAGE table is missing some transaction activity?
We have a situation where the monthly ST03 file shows that a user executed the MI31 transaction some time back in August. However our ACTUSAGE table does not show this user performing MI31 for any day in August.
It does have records of other people using MI31 in August. It also has records of this same user performing other transactions in August. It even has records showing other transactions this same user performed in August.
This is now an issue with our external Auditors.
We are on GRC 5.3 SP 13.
Thanks.

Hi Bob,
VIRSA_CC_ACTUSAGE holds information on the transactions executed by users and it gets the data from STAD. Did you notice the time user has spent in the MI31 transaction code (I know even if the user hasn't spent more time, it should be recorded), but this another step to isolate the issue.Also, check SM21 logs on that specific day, and see if there are any events registered during that time related to STAD. I think it was not able to collect the data.
Also, check VIRSA_CC_ALTCDLOG. This is the Alter log table that stores information of ACTUSAGE. The purge utility will only delete the data from the ACTUSAGE, but it remains in the ALTCDLOG.
Refer to SAP Note 1512020 for additional details on the Alert files.
Hope this helps!!
BR,
Raghu

Problem with action events........ :(

hi all,
there is a strange problem which me and my colleagues are facing now-a-days......
For some odd and unknown reason, the links on the page suddenly stops woking... it goes like this....
we write events (buttons or action links) .... we test them and they are working fine...... than we write some other piece of code and than run the program and links work no more... The program never goes in the action event for the component...... and surprisingly it also dont show an error.... It just keeps on refreshing itself again and again....... (this thing is also verified by using debugger that actions events just stop being called....) it happens for random situations ...... Once i thought that maybe its has to do something with beforeRenderResponse() method... but it happens even in beans without beforeRenderResponse() method.....
Can anyone tell me whats going on around here???? we are extremely confused here with dead lines approaching fast........
regards

I've had this same problem....links were working fine yesterday. I added more functionality which didn't even affect the links, and now they're not working. Unfortunately, I don't have a solution either.
Has anybody been able to access the logging in the facescontext or application to see what the lifecycle is doing before it stops???

******** Need to add any button activated ACTION EVENT***********

Can anyone help me add any type of ACTION EVENT /ACTION LISTENER TO THIS CODE
PLEASE REVIEW AND COMPILE IF NECESSARY. Ensure that it compiles without errors. Currently it compiles without errors. It opens up as a GUI window that accepts a password. If anyone could just add a button to it that will do just about anything, time check, date check whatever it would be great!!!!! THIS WAS COMPILED WITH THE JGRASP COMPILER JAVA ACCEPTED
Thank you all,
********************** Bruce's Code*****************************
import java.awt.*;
public class TimeEntryForm extends Panel
private Panel tallPanel = new Panel();
private Panel tallPanel2= new Panel();
public TimeEntryForm()
tallPanel.setLayout(new GridLayout(3, 1));
tallPanel.add(new Label("Hrs Total"));
tallPanel.add(new Label("Any"));
tallPanel.add(new Label("One"));
tallPanel2.setLayout(new GridLayout(3,1));
tallPanel2.add(new Label("Personal Leave "));
tallPanel2.add(new Label("Hrs Total "));
tallPanel2.add(new Label("Pay Calc "));
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0; c.gridy = 2;
add(new Label("Social Security # "), c);
c.gridx = 1; c.gridy = 0;
add(new Label("TIME ENTRY FORM"), c);
c.gridx = 1;c.gridy = 1;
add(new Label("Enter Date Here "), c);
c.gridx = 3;c.gridy = 2;
add(new Label("Employee Name "), c);
c.gridx = 3;c.gridy = 4;
add(new Label("Sick Time "), c);
c.gridx = 0; c.gridy = 3;
add(new Label("IN OUT "), c);
c.gridx = 0; c.gridy = 4;
add(new Label("IN OUT "), c);
c.gridx = 0; c.gridy = 5;
add(new Label("IN OUT "), c);
c.gridx = 0; c.gridy = 6;
add(new Label("IN OUT "), c);
c.gridx = 0; c.gridy = 7;
add(new Label("IN OUT "), c);
c.gridx = 0; c.gridy = 8;
add(new Label("IN OUT "), c);
c.gridx = 0; c.gridy = 9;
add(tallPanel2, c);
c.gridx = 1;c.gridy = 11; //note, sets y
add(new Label("Hrs Worked Today "), c);
c.gridx = 1;c.gridy = 12;
add(new Label("Pay Earned Today "), c);
c.gridx = 2;
add(tallPanel2, c);
public static void main(String args[])
Frame f = new Frame("Time Entry Form");
f.add(new TimeEntryForm());
f.pack();
f.setVisible(true);
}

Hi java-luv,
I am not sure if I understand the problem. But I was able to add a JButton to your code (using the JBuilder designer). The button just exists the application. Please check the listing below. Hope this helps.
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
public class TimeEntryForm extends Panel
private Panel tallPanel = new Panel();
private Panel tallPanel2 = new Panel();
private JButton jButton1 = new JButton();
public TimeEntryForm() {
tallPanel.setLayout(new GridLayout(3, 1));
tallPanel.add(new Label("Hrs Total"));
tallPanel.add(new Label("Any"));
tallPanel.add(new Label("One"));
tallPanel2.setLayout(new GridLayout(3, 1));
tallPanel2.add(new Label("Personal Leave "));
tallPanel2.add(new Label("Hrs Total "));
tallPanel2.add(new Label("Pay Calc "));
setLayout(new GridBagLayout());
GridBagConstraints c = new GridBagConstraints();
c.gridx = 0;
c.gridy = 2;
add(new Label("Social Security # "), c);
c.gridx = 1;
c.gridy = 0;
add(new Label("TIME ENTRY FORM"), c);
c.gridx = 1;
c.gridy = 1;
add(new Label("Enter Date Here "), c);
c.gridx = 3;
c.gridy = 2;
add(new Label("Employee Name "), c);
c.gridx = 3;
c.gridy = 4;
add(new Label("Sick Time "), c);
c.gridx = 0;
c.gridy = 3;
add(new Label("IN OUT "), c);
c.gridx = 0;
c.gridy = 4;
add(new Label("IN OUT "), c);
c.gridx = 0;
c.gridy = 5;
add(new Label("IN OUT "), c);
c.gridx = 0;
c.gridy = 6;
add(new Label("IN OUT "), c);
c.gridx = 0;
c.gridy = 7;
add(new Label("IN OUT "), c);
c.gridx = 0;
c.gridy = 8;
add(new Label("IN OUT "), c);
c.gridx = 0;
c.gridy = 9;
add(tallPanel2, c);
c.gridx = 1;
c.gridy = 11; //note, sets y
add(new Label("Hrs Worked Today "), c);
c.gridx = 1;
c.gridy = 12;
add(new Label("Pay Earned Today "), c);
c.gridx = 2;
add(tallPanel2, c);
jbInit();
public static void main(String args[]) {
Frame f = new Frame("Time Entry Form");
f.add(new TimeEntryForm());
f.pack();
f.setVisible(true);
private void jbInit() {
jButton1.setText("Exit");
jButton1.addActionListener(new TimeEntryForm_jButton1_actionAdapter(this));
this.add(jButton1, null);
void jButton1_actionPerformed(ActionEvent e) {
System.exit(0);
class TimeEntryForm_jButton1_actionAdapter implements java.awt.event.ActionListener {
TimeEntryForm adaptee;
TimeEntryForm_jButton1_actionAdapter(TimeEntryForm adaptee) {
this.adaptee = adaptee;
public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e);

Translated wire message missing some values

Hi,
I am enqueuing an EDIFACT xml to B2B out queue (IP_OUT_QUEUE) which is getting converted to wire message and delivered correctly. But the translated wire message is missing some values:
UNH segment of EDIFACT xml:
<Segment-UNH>
<Element-0062>1</Element-0062>
<Composite-S009>
<Element-0065>ORDERS</Element-0065>
<Element-0052>D</Element-0052>
<Element-0054>07B</Element-0054>
<Element-0051>UN</Element-0051>
</Composite-S009>
</Segment-UNH>
Starting part of wire message:
UNA:+.? 'UNB+UNOB:1+ + +100407:2354+1003'UNG+ORDERS+ + +100407:2354+1003+UN+D:07B'UNH+1+ORDERS'BGM+105:::?' ?'+GSIAP.WORLD?:oracle.apps.po.event.xm::?'
In wire message, 'UNH+1+ORDERS' - this portion is not having values of Element-0052, Element-0054 and Element-0051. Why are this values ('D','07B','UN') missing in the translated wire message?
How can I make them appear in wire message?
Appreciate your help.
Thanks in Advance,
Siddhesh

Hi Siddhesh,
Check your ecs file. Possibly you have not defined these params in ecs file.
Enable the validation then you will come to know exact issue.
Rgds,
Nitesh Jain

Adding action events

Whenever i used to add action event, i used to do it like:
submitJButton.addActionListener(
         new ActionListener() // anonymous inner class
            // event handler called when startJButton is pressed
            public void actionPerformed( ActionEvent event1 )
               submitJButtonActionPerformed( event1 );
         } // end anonymous inner class
      ); // end call to addActionListenerHow can i add action events to these two buttons though?
    private JPanel createButtonPanel() {
          JPanel panel = new JPanel();
          JPanel temp = new JPanel(new GridLayout(1,2, 5,5));
          temp.add(new JButton("REGISTER"), BorderLayout.LINE_START);
          temp.setPreferredSize(new Dimension(200, 40));
          temp.add(new JButton("LOGIN"), BorderLayout.LINE_END);
          temp.setPreferredSize(new Dimension(200, 40));
          panel.add(temp);
          return panel;
     }

That works really well. Now for the register button, how would i get this register class to display?
package layout;
import javax.swing.*;
import java.awt.*;
public class Register {
    private static void createAndShowGUI() {
     String[] labels = {"Name: ", "ID No: ", "Username: ", "Password: "};
     int numPairs = labels.length;
    JPanel pan = new JPanel(new SpringLayout());
    for (int i = 0; i < numPairs; i++) {
        JLabel lab = new JLabel(labels, JLabel.TRAILING);
pan.add(lab);
JTextField textField = new JTextField(10);
lab.setLabelFor(textField);
pan.add(textField);
SpringUtilities.makeCompactGrid(pan, numPairs, 2, 6, 6, 6, 6); //(rows, columns, initx, inity, xpad, ypad
     JFrame frame = new JFrame("Nerkesa Pignatelli");
     frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
     pan.setOpaque(true);
     frame.setContentPane(pan);
     //Display the window.
     frame.pack();
     frame.setVisible(true);
public static void main(String[] args) {
javax.swing.SwingUtilities.invokeLater(new Runnable() {
public void run() {
createAndShowGUI();
}The only reason i ask this is because i followed the sun tutorial site to produce this register form and when it run's it,, it uses createAndShowGUI(); where when i have added different classes to action events before, i have normally used somthing like in my title class, new Title().setVisible(true);

JComboBox Action Event problems

I have a complex UI with which I am having action event issues. Basically, the panel displays info about an object, which can be selected from within the panel through a button/popup window mechanism. A JComboBox (#1) selection determines the contents of another JComboBox (#2) on the same panel. Currently an ActionEvent fires when the user makes a selection using #1 that updates #2. This fuctions correctly with repeated testing so long as a new object is not selected.
When a new object is selected from within this panel this ActionEvent no longer fires. JComboBox #1 will be updated correctly and #2 will reflect the initial selection in #1, but user selections in #1 will not fire the ActionEvent and thus #2 is never updated.
Any help is appreciated. I feel like I'm missing something basic here, but I've stared at it for long enough...

By the way, the workaround is to use the ItemListener as the ItemStateChanged Event is fired reliably.

I am trying to download a calendar into ical and keep getting this message-Some of the events in this calendar have alerts that open files or applications. What am I doing wrong???

I am trying to download a calendar into ical and keep getting this message-Some of the events in this calendar have alerts that open files or applications. Remove alerts or cancel
What am I doing wrong or missing??

I have this same problem in October of 2013. I am unable to import .ics files into Lion that I exported from my Snow Leopard MacBookPro without losing all of my future events (which all have alerts attached). All of the events from BEFORE today's date are successfully importing, presumably because they are no longer expected to trigger alerts via Apple Mail. After my first unsuccessful attempt, I learned that iCal was communicating with iCloud by default. I have since turned off iCloud, but I have not found a solution to the problem. Harvey

Missing some JButton action events

Similar Messages

Maybe you are looking for