How To Use Event Listeners In Java

May 6, 2014

How the event Listeners work in java,To get the data based on the event occurs in outside the application. I have this method in one of my API class I am not understanding how this methods are going to work.
 
public interface SBXPCXMLEventListener {  
public void OnReceiveEventXML(String eventXML);
}  
private static List<SBXPCXMLEventListener> listenerList = new ArrayList<SBXPCXMLEventListener>();  
protected static void fireXMLEvent(String xml) {  

[Code] ....

I have done like this.This is used to capture the events from the fingerprint machine when run this class I am not getting any data from the machine when i did thumb impression in the machine.

public class EventListnere implements SBXPCXMLEventListener {
    public static void main(String[] args) {
        boolean flag = SBXPCProxy.ConnectTcpip(1, "10.0.0.8", 5005, 1234);
        System.out.println("flag = " + flag);
//        SBXPCProxy.st

[Code] .....

View Replies


ADVERTISEMENT

How To Create Event Scheduler In Java

Dec 17, 2014

How would you begin a program that schedules events? I've found codes that are similar like Calendars, but I need something that will still import the real day, month, year. But I want to have columns that show Room numbers, and rows that shows time slots. How to get started such as which GUI components to use, what packages to import, etc.?

View Replies View Related

Not Able To Call Java Method From Event

Mar 4, 2014

I used java and jsf. I created dynamic datatable in java file. Can i call java method from setOnchange() event?

I am able to call java script function from setOnchange() event. See the below code which is working fine for java script.

HtmlSelectOneMenu selectOneMenu = new HtmlSelectOneMenu();
selectOneMenu.setStyleClass("dropdownStyleTwo");
selectOneMenu.setOnchange("openWin(this);IGNORE_UN LOAD=false");

I wrote openwin() function in java script. But i am not able to call java method change().

Code which is not working.

HtmlSelectOneMenu selectOneMenu = new HtmlSelectOneMenu();
selectOneMenu.setStyleClass("dropdownStyleTwo");
selectOneMenu.setOnchange("myclass.change();IGNORE _UNLOAD=false");

myclass is the bean of class Test. If user select any value from dropdown i want to call change java method. This function will apply the same selected dropdown value to the other record also.

View Replies View Related

Implementing Probability Of Event Occurring In Java

Jun 7, 2014

You're given a number between 0 and 1 that corresponds to the probability of an event occurring.

0.7 is 70%, 0.235 is 23.5%, 0 is 0%, etc.

Someone tries to perform the event, but the event only has the given probability of occurring. Run the probability, and then if it's true, run the event. Otherwise don't run the event.

All I know how to do is generate random numbers (kind of), but if you have 0.2245 I really don't see how generating random numbers can efficiently perform that probability.....

View Replies View Related

How To Add Listeners In A Object

Apr 27, 2014

I am having some issues with my GUI. I have a UserList GUI (not finished) that, on button click, will check for an open chat window and open a new window if none exists or add a tab if one does (this is working fine). My issue is that the listeners I added to my chat window only work for the last tab added. If I switch back to a previous tab, I can no longer use my input textField and send button to write to my textArea. I add listeners when I initially create the window and first tab. I thought about adding ChangeState listener, but couldn't work out how it would be any different than what I am doing now. Do I not fully understand how listeners are added to a particular object?

I will post my code for the whole class so you can get the full picture.

Java Code: public class Chat extends JFrame{
private JPanel tabPanels, mainPanel;
private JTextArea chatArea;
private JTextField inputArea;
private JButton send;
private JTabbedPane tabPane;
private JScrollPane scroll;
private String name;

[Code]...

View Replies View Related

How To Reference Action Listeners

Mar 15, 2015

I am making an MVC program and I am not allowed to put the action listeners in the view class. I was able to get one button working fine but since I am unable to reference them I cannot give them both individual responses.

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Controller {
HobbyList model;
ListView view;

[code]....

View Replies View Related

MVC Layout - Adding Listeners?

May 4, 2014

So I'm doing a basic MVC layout for a pretty basic game that I am making in order to understand the whole MVC layout. The game requires the user to move up/down/left/right via JButtons on the GUI. Since I'm using an MVC layout and my buttons are in a different class than the ActionListeners, I was wondering what the best way to add the action listeners are?

Method 1:

View Class ActionListener method:
Java Code: public void addMovementListeners(ActionListener u, ActionListener d, ActionListener l, ActionListener r){
moveUp.addActionListener(u);
moveDown.addActionListener(d);
moveLeft.addActionListener(l);
moveRight.addActionListener(r);

[Code] ....

Which method is better? Is there another method that is even better than these two? Trying to get this MVC thing down.

View Replies View Related

ATM Machine - Action Listeners

Mar 27, 2014

My output is all over the place. I cancelled out the borderlayouts beneath each panel I created and it completely changed the output, and I'm not sure why. The first photo below, shows what it looked like with the layouts and the second shows the output without. I still don't understand why I don't see the digits 1-9.

Java Code:

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionListener;
public class Atm extends JFrame {
Atm(){
super("ATM");
//Create Panels For ATM
JPanel buttonPanel1 = new JPanel(); //To Contain Digits 1-9

[Code] ....

Why would setting the layout beneath each object change the layout so much? I stayed consistent in my use of BLayout and GLayout in the program.

View Replies View Related

Swing/AWT/SWT :: MVC Layout - Adding Listeners?

May 4, 2014

So I'm doing a basic MVC layout for a pretty basic game that I am making in order to understand the whole MVC layout. The game requires the user to move up/down/left/right via JButtons on the GUI. Since I'm using an MVC layout and my buttons are in a different class than the ActionListeners, I was wondering what the best way to add the action listeners are?

Method 1:

View Replies View Related

Swing/AWT/SWT :: Multiple Action Listeners?

Oct 25, 2014

So im making a calculator just basic 4 function with a clear button. as i am working into this project i am running into an issue of assigning which click sets what. For instance i click the two button how do i tell it to assign it to firstNum, versus secondNum?

private class theHandler implements ActionListener{
public void actionPerformed(ActionEvent event){
if(event.getSource()==one){
firstNum=1;
}
if(event.getSource()==two){
secondNum =2;
}
if(event.getSource()==three){
secondNum =3;
}

So this for instance allows me to set one to the firstNum and then add it to two or three but im not sure what to do next. I have in my mind i want to do something like make three listener classes, that operate in sequential order like you pick the first numbers, click an operation, and then select the second numbers then hit the operation(equal) button to display answer. Am i on the right track or what?

View Replies View Related

JavaFX 2.0 :: Remove All Listeners And / Or All Bindings?

Jun 17, 2014

Is there any way in JavaFX 8 to remove all change/invalidation listeners on an observable? And is there any way to remove all bindings on a property?

View Replies View Related

Swing/AWT/SWT :: Action Listeners - Pizza Ordering GUI

Dec 3, 2014

I've got the layout put correctly but I can't seem to get my action listeners to work correctly.

import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class PizzaOrderDriver
{
public static void main(String[] args)
{
JCheckBox show1;

[Code] .....

View Replies View Related

Set Listeners Of Cells To Save Information Of Entire Table After Modification

Aug 18, 2014

I am having trouble with a jTable that I am using. I have set the listeners of the cells to save the information of the entire table every time they are modified, but run into the problem that the last modified cell does will not reflect its most recent value. The value will display visually, but not show up when I try to read from the cell. I have tried wrapping the saveProcGuide() call in swing's invokelater, but to no avail. I have marked the area where the problem becomes evident (values returned do not match those present in the visible table object). Below is the offending code:

// This is where I set up the listeners
private void addProcGuideWithValues() {
procTableModel.addRow(new Object[]{"", ""});
// document listener to be fed into editor/renderers for cells...
DocumentListener docuListener = new DocumentListener() {
public void changedUpdate(DocumentEvent e) {
saveProcGuide();

[Code] .....

View Replies View Related

Window Closing Event

May 20, 2014

I have a WindowClosing(WindowEvent e) method, but when I close my window it isn't doing anything inside the method. I am making a launcher and I want to make it so when the actual game window is closed it makes the launcher window visible again.

Java Code: public void windowClosing(WindowEvent e) {
this.jf.setVisible(true);
} mh_sh_highlight_all('java');

View Replies View Related

Swing/AWT/SWT :: Where Is Event Source Object

Feb 28, 2015

java.awt.Component is an abstract class, and it's direct Sub-classes are Button, Canvas, Checkbox, Choice, Container, Label, List, Scrollbar, Text Component

So, when I use addXListener(mylistenerclass m);//which is a method of Component class which object is holding the list of all listeners, for a particular Event Source?

I am under the assumption that - there is an Event Source Object(possibly static) for every Event Source type(mouse, keyboard etc) that holds a list of destinations(classes that implements their listener interface) - added to the the object via addXListener method. When an event happens(mouse click, drag etc) the Event Source Object creates an Event Object and send it to all the destinations. Is my assumption correct? I can't seem to find the location or declaration of Event Source Object and the list where it stores it's registered destinations.

View Replies View Related

Passing Data From One Action Event To Another

Oct 5, 2014

this is the first code

import java.awt.*;
import java.awt.event.*;
import java.sql.*;
public class ChickenListener implements ActionListener {
int loopctrl;
static Connection cn;
static Statement st;
static ResultSet rs;
static PreparedStatement ps;
 
[Code]...

the second code

import java.awt.*;
import java.awt.event.*;
import java.sql.*;
public class QuantityCounterListener implements ActionListener {
String tempStrng;
int tempInt;
int x = 0;

[Code]...

what my problem is i need to transfer what does "tempString" from code 1 holds to code 2 in the //x part in the prepared statement.

View Replies View Related

Mastermind Game - Comparison Event

Jan 14, 2015

I'm not so new to java i know the basics. I want to make a mastermind game. Just for training purpose.

Now i am at the comparison phase where it is comparing your chosen "colors" with the actual "color code"

This is my code for that part:

guesChars is a char array of 4 of the actual code
readGuess is a string of 4 of which the players has filled in the console
goodGuess is a char at the right position with the right "color"
avgGues is a char with the right "color" at the wrong position

Java Code:

for(int i = 0; i < guessChars.length; i++){
for(int ii = 0; ii < readGuess.length(); ii++){
if(readGuess.charAt(ii) == guessChars[i]){
if(ii == i){

[Code] .....

The problem is when the code is for example

ACDD

and the player guess is

ADDD

Result is

2 right spot right color

1 right color wrong spot

It have to be

2 right spot right color

0 right color wrong spot

View Replies View Related

Array Of Buttons Event Handlers?

Apr 21, 2014

how to implement action listeners for an array of buttons. The program has an array of buttons like the number pad on a keyboard, when the user clicks a button the number/button clicked will append to the textfield. So far I'm just working on the GUI.

import java.awt.Container;
import java.awt.FlowLayout;
import java.awt.GridLayout;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;

[code].....

View Replies View Related

Event Handlers With Flag Quiz App

Jun 6, 2014

regionsBuilder.setMultiChoiceItems(
displayNames, regionsEnabled,
new DialogInterface.OnMultiChoiceClickListener()
{
@Override

[code]...

Questions:

1. Describe what the code displays. A error message would be shown when the use has selected an insufficient number of options.

2. Describe when an event handler (included in the code) gets executed? The event handler gets executed every time a user selects an option(???)

3. Explain a feature of what is displayed

4. Explain the meaning of all of the parameters in the central, complicated call of the code.

5. Describe how the code handles two possible situations.When the user has selected a sufficient number of options (no less than or equal to 0), then no error message would be shown. On the other hand, an error message will be shown when the user has not selected a sufficient number of options (0). (???)

View Replies View Related

JSF :: Displaying Value In OutputText When Some Event Occurs

Apr 15, 2014

I have one requirement where when i click on the attribute i would like to create an action and display the same in OutputText.

Ex:

This is Attribute Description outputText :

<rich:columnGroup id="CMAttributeBrowserDescriptionRow2">
<rich:column id="CMAttributeBrowserDescriptionColumn2" styleClass="selectedObj"
rendered="#{CMBrowserBean.attributePresent}" >
<!--<h:outputText id="SelectedObjectDescription1" render="true" value="#{currentAttribute.value}"/>-->
[b][quote]<h:outputText styleClass="attributeTableFont1" readonly="false" id="attributeTextdescription" disabled="false"/>[/quote][/b]
</rich:column>
</rich:columnGroup>

The action should be for :

<rich:column id="AttributeColumn2" styleClass="parentBrowserColumn">
[b]<a onclick="document.getElementById('CMBrowser:0:CMAttributeBrowserDescriptionForm:attributeTextdescription').value=#{currentAttribute.name}" >[/b]<h:outputText id="AttributeName" title="#{currentAttribute.name}" value="#{currentAttribute.name}"
styleClass="attributeValueFont" /></a>
</rich:column>

I am unable to get the text coming on outputText, when i click on the above attribute.

View Replies View Related

Swing/AWT/SWT :: Event Driven Development

Feb 22, 2014

I think will be easy for me start with a GUI and then make things happens when the user clic on Buttons.Is there a good book about Event driven development on Java?

View Replies View Related

JavaFX 2.0 :: Only One Change Event On ObservableList?

Apr 9, 2015

I have a list of Row objects and want to listen to changes in the name property of a Row object.
 
public class Row implements Serializable {
    private final SimpleStringProperty name = new SimpleStringProperty(this, "name", "");
    public Row() {
        this("");
    }
    public Row(String name) {
        this.name.set(name);

[Code] ....
 
I would expect to be notified 4 times. Line 23: Added, Line25, 26, 27: Update

But there are only 2 change events. For Line 26 and 27 there is no change event.

View Replies View Related

Swing/AWT/SWT :: Which Event Is Generated When Scrollbar Update

Jan 1, 2015

Which event is generated when a scrollbar is update?

View Replies View Related

Swing/AWT/SWT :: Implementing Multiple Event Handlers

May 3, 2014

I'm having difficulty implementing keyboard and mouse event handlers at the same time for a program designed to notify the user when a key has been pressed or a mouse button clicked.

I can make and understand a program that does one or the other, but when I try to combine them, either the keyboard only or the mouse only works.

here is the code:

import java.awt.Color;
import java.awt.event.KeyListener;
import java.awt.event.KeyEvent;
import javax.swing.JFrame;
import javax.swing.JTextArea;
import java.awt.event.MouseListener;

[Code] ....

View Replies View Related

Swing/AWT/SWT :: Right Button Event Mouse In Jtable

Feb 18, 2014

I'm trying to can make right button event to show a popup of copy/paste in a jtable but I put these code and doesn't works:

public class UI implements ActionListener, DocumentListener, MouseListener{
private JFrame ventana;
private JTable table;
private JPanel panel;
private JScrollPane tableScrollPane;

[Code] .....

View Replies View Related

Event Handler For Two JTextFields To Only Allow Numerical Input

Jun 25, 2014

I am trying to create an event handler for two JTextFields to only allow numerical input. It consumes all letter but for some reason the "n" key still gets through. I have the spaghetti code below.

public void keyTyped(KeyEvent in) {
char input = in.getKeyChar();
if (in.getSource() == scaleField){
if (!(Character.isDigit(input) ||
(input==KeyEvent.VK_BACK_SPACE) ||

[Code] ......

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved