JSF :: Dynamic Visibility Control Using SelectOneMenu

Apr 4, 2014

I'm trying to implement a functionality which will control the visibility of three outputText. I'm using a selectOneMenu, which has three options. Each option will enable visibility of one outputText, and rest will be invisible.

I used the following code

<h:selectOneMenu id="search" styleClass="select-box" value="#{empMB.showHide}" required="true" requiredMessage="Please Select an Option" >
<f:selectItem itemLabel="-----Select----"/>
<f:selectItem itemLabel="By Name" itemValue="1"/>

[Code] ....

Initially all outputText s is invisible as rendered value is false, but when I select different options, their respective outputText s are not visible.

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JSF :: SelectOneMenu Control Not Returning Selected Value

Aug 18, 2014

I am having a problem with the SelectOneMenu control. I want the the selected item to be be displayed via the valueChange Ajax event listen. But this is not happening.

However, when I change the value in the SelectOneMenu and then click on the Submit button, then selected value is getting displayed via the 'save' bean function

The relevant xhtml code is as follows:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
xmlns:ui="http://java.sun.com/jsf/facelets"
xmlns:h="http://java.sun.com/jsf/html"
xmlns:p="http://primefaces.org/ui"
xmlns:f="http://java.sun.com/jsf/core">
<h:head>
<style type="text/css">

[Code] .....

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Apr 9, 2015

Let's say within a class I create a method that takes care of creating a java swing layout with labels, buttons etc.. then attach an action listener (inner class) for each button to change a respective label text. All I would need is that the action listener method can access and modify the label as needed.

Have read about static, protected, private, getters and setters but honestly bit confused about which structure should be adopted as a best practice. Global static protected variables for the labels along with private inner classes implementing ActionListeners believe will do the trick and will be able to access the labels but not convinced this is good practice.

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JSF :: Generate Selectonemenu Dynamically

May 19, 2014

I am working on shopping cart application in which i want to generate selectonemenu dynamically for setting Item attribute from database.for eg, I have 4 tables item, attribute,attribute_value and mapping of this three. Now i want that I ask user to select attribute for item and than assign value.to assign attribute to item i created checkboxlist that is working perfectly then i want that selected attribute as label and their value appear inside dropdown.

i made to display but get confused when it comes to storing this value in database confused in red underlined place..This is without any dynamic generation but i think solution is dynamic component but dont know how code snippets:

<c:forEach items="#{itemManagedBean.allAttribute}" var="att">
<h:outputText value="#{att.key}" title="">
</h:outputText>

[code]....

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JSF :: Inserting Parent And Child Entities Into A Third Entity Using SelectOneMenu?

Oct 31, 2014

The company entity contains companyName, Sector and Segment columns. The mapping is 3 entities (Company, Sector, Segment) where Sector and Segment are used to create a company record. Sector has a OneToMany relationship with Segment and with Company. I put the Sector and Segment values into two select menus as use these to create a Sector and Segment reference for the Company table. I'm getting the following exception:

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Cannot add or update a child row:
a foreign key constraint fails (`testdummy`.`company`, CONSTRAINT `FK_COMPANY_FK_COMPANY_SECTORID` FOREIGN KEY
(`FK_COMPANY_SECTORID`) REFERENCES `sectors` (`SECTORID`))
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
at java.lang.reflect.Constructor.newInstance(Constructor.java:526)

I'm thinking that the problem is that since the Segment entity is a child of Sector it must be entered through an instance of Sector. Because it's being entered as a separate value I'm getting this error. The problem is Segment is defined as a Set in the Sector entity and I can't figure out how to declare Segment as an instance using its parent entity (Sector).

My code is as follows, starting with the Sector entity:

@Entity
@Table(name = "SECTORSNEW")
public class SectorsNew {
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private int sectorId;
private String sectorName;
@OneToMany(cascade = CascadeType.PERSIST)

[code]....

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How To Make Panels Visibility Go False / True With Actionlistener

Jan 28, 2014

I'm trying to create a program that has two labels... one in the top left and one in the top right... so far when i run it only the one in the top right (label2) shows... also In the program there will be multiple button and when I click a button it will show a different panel and then i can go back to the first panel to select other panels... so far i haven't figured out how to make panels visibility go false/true with actionlistener. last thing... when i have more then one panel added to the frame none of them show up.

Java Code:

//Matthew
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test{
public static void main(String[] args){

[code]...

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Swing/AWT/SWT :: Can't Change Visibility Of Two JPanels When Calling Method From Button Event In Another Class

Dec 30, 2014

I have two classes involved in this portion. CheckIn_Search

(class #1) is my main UI and I am collecting search information from the user in a jPanel form. When they click "Search" it passes the search criteria to a method that contacts a web service and gets the results. These results are passed to coSearchResults

(class #2) that opens a jFrame and jTable (in modal format, over the main window created by CheckIn_Search.

The user selects a row in the table and that selection data is passed back to coSearchResults to populate a new jPanel form. When the data is passed from coSearchResults, I want to close its window, hide the first jPanel in CheckIn_Search and make the second jPanel visible. To accomplish this, I created a method in CheckIn_Search that simply hides/shows the panels (it will do more later).

I instantiate and call the method in CoSearchResults as part of the button click event. The problem is, it doesn't work. The panels are unaffected and there are no errors. I've put in break-points and it goes into the method.. Here is the coSearch_Results code.

Here is am retrieving the jtable row id and using the first value in the row to get the data from the table model as there is more data than what is displayed in the table. I'm sending that whole row of data to the method that changes visibility.

private void btnOKActionPerformed(java.awt.event.ActionEvent evt) {//GEN-FIRST:event_btnOKActionPerformed
// TODO add your handling code here:
int rowNum = jTable1.getSelectedRow();
String coNum = jTable1.getValueAt(rowNum,0).toString();
String[] text;

[code]....

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Oct 11, 2014

Is there a way you can control user input?

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Nov 18, 2014

how am i supposed to make line1B with "1f" and line2B with width of "10f"?

PHP Code:

import java.awt.*;
import java.awt.event.*;
import java.applet.Applet;

[code]....

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Sep 2, 2014

So I'm working on some networking code and I have the Server running as its own thread, then I have a PacketListener which is contained in the Server, that is running on its own thread too. As of right now, the PacketListener waits for packets via DatagramSocket.receive() and then adds them to a queue. The Server runs in a loop and it checks that queue for packets and then polls the most recent and process it before sleeping for 1 millisecond. Here is my question though, I'm considering changing the program to a more observer pattern structure in that when the PacketListener would receive a packet, rather than add it to the queue, it'd notify the server which would process it. However, wouldn't this cause additional time required within the PacketListener thread dedicated to processing the packets rather than listening for them?

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Jun 14, 2014

I have a multithreaded java program. I have a few worker threads which process data over a udp server. Then I have another thread for console input. The problem is when there is an error with one of the worker threads, and it prints to the console, my console thread loses "focus", that is, the while loop seems to no longer run. Here is the console thread:

Java Code:

public void run() {
Console c = System.console();
if (c == null) {
Logger.writeError("No console.");
System.exit(1);
}
while(true){
String login = c.readLine(">>>: ");
System.out.println("You entered: " + login);
}
} mh_sh_highlight_all('java');

When an exception is raised, it prints it to the console, and suddenly the program no longer shows the >>> prompt from above.

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Jul 24, 2014

I'd like to ask is there way to control the RMI lookup timeout through programming or network configurations.
 
In a testing environment, I have purposely disconnect or plug out the cable between two testing servers to check the reliability.

It took very long time for the RMI API to throw out java.rmi.ConnectException which used Naming.lookup(givenURL).

I have tried to set system properties like sun.rmi.transport.tcp.handshakeTimeout, but it didn't take effect at all.

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IMG_4216.JPG

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Jul 22, 2014

I have developed JavaFx application with playback option using JavaFx Media player and slider controls. I am updating slider value using javafx mediaplayer.currentTime().addListener() method by adding Change/Invalidate listener.

While playing MP4 video, slider values are not updating (Change/Invalidate listener not getting triggered while playing video) on Mac OS(version : 10.9.1). Below is the sample code snippet.

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Mar 11, 2014

I am writing a program where i am trying to control a rectangle and determine where it moves, everything is working fine it is moving but i am trying to figure out how to change direction using the "WASD" keys. This is what I have and I am not sure why its not working.

Java Code:

addKeyListener( new KeyAdapter() {
public void keyReleased(KeyEvent event) {
for (MoveableShape creature : creatures) {
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[Code] ....

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Apr 2, 2014

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Why is that ? Why am I unable to add this site to list ?

I am using 64-bit system and have downloaded and installed 64 bit update patch 51.

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Oct 25, 2014

Create a one dimensional array which holds 10 values. Ask the user to input an index value between 0 and 9. Print the value the user selected. Be sure to explain the output to the user. That is my assignment, and here is my code:

import java.util.Scanner;
public class Array {
public static void main(String args[]) {
Scanner sc = new Scanner(System.in);
int a[]= new int[9];
a[0] = 10;
a[1] = 20;

[code]....

I don't know how to use the scanner to get someone's input properly.

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