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] .....
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Feb 5, 2015
Release 8u40 introduces the TextFormatter concept in the text input field area. It is currently a new property of the TextInputControl class. This is definitely a more elegant way to deal with validation than overriding "replaceText(...)".
Shouldn't this property also be available in list, table and tree cells? Are there plans to do this (before we make our own implementation) ?
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Nov 17, 2014
I have a HTML table whose rows are getting generated through javascript function. I want to save this data in the table rows.
**HTML Code**
<div style="width:100%;height:100%;border:1px solid black; overflow-x:scroll; overflow-y:scroll; padding:0">
<table border=0>
<tr>
<td>
<input type="button" name="add_details" id="add_details" value="Add" onclick="AddDetails()">
<input type="button" name="delete_details" id="delete_details" value="Delete" onclick="DeleteDetails()">
[Code] .....
When i press submit button in my form of JSP, how can i access table data?
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Mar 15, 2015
I am trying to insert information from a CVS file in a postgres table and I have this exception:
Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 0
at crislicenta.automateImport.main(automateImport.jav a:29)
and the cod line is: db.importData(conn,args[0]);
The source code:
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.Statement;
import java.sql.ResultSet;
import java.sql.SQLException;
public class automateImport {
static final String JDBC_DRIVER="com.mysql.jdbc.Driver";
static final String DB_URL="jdbc:postgresql://localhost5432/";
[code]....
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May 22, 2014
how I would achieve the concept of saving the contents of a JTable, so even after program restarts, the table would retain the data. I am developing a utility that will be a password storage book. The user enters passwords and they are stored in a JTable. Currently, the table resets whenever the program is restarted, however I would like it to keep it's data. URL....
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Sep 25, 2012
How to force browser to open/save/save as the file from server instead of browser cache.
I am creating a csv file through a pl/sql procedure and forwarding the link to user once user clicks on link he downloads the file, however if the same thing is repeated then browser returns the old cached file instead of new file generated on server.
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Mar 27, 2014
My code is like this,
for(Iterator iterator = list.iterator(); iterator.hasNext();) {
String string = iterator.next().toString();
list.add(string + "Hello");
iterator.remove();
}
Its a simple program. I've list with some names as values like,
Ram, Sham, Bham, Bhim, Suraj.
Now, I want to add "Hello" to each name by running above code. While iterating, first time I get Ram, I want to add "Hello" to Ram and add to list as "Ram Hello" also I want to remove original Value i.e "Ram". When I run above code it is giving Concurrent Modification Exception. How to do this?
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May 12, 2014
I had to write a charge account validator program that compared the number you entered to a list of numbers using the array method. Now I have to modify the program to do the same thing but from a .txt file instead. I understand it is saying that AccountNumbers.txt does not exist, but I am positive that it does.
Here is my error message:
run:
Exception in thread "main" java.io.FileNotFoundException: AccountNumber.txt (No such file or directory)
at java.io.FileInputStream.open(Native Method)
at java.io.FileInputStream.<init>(FileInputStream.java:146)
at java.util.Scanner.<init>(Scanner.java:656)
at validatormodtest.ValidatorMod.<init>(ValidatorMod.java:24)
at validatormodtest.ValidatorModTest.main(ValidatorModTest.java:24)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds)
Here is my code:
ValidatorModTest.java
package validatormodtest;
import java.util.Scanner;
import java.io.*;
public class ValidatorModTest {
[Code] ...
Attached File(s)
AccountNumbers.txt (159bytes)
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Apr 7, 2014
I'm writing an IRC server in Java, however when a client tries to connect I get a ConcurrentModificationException trying to add them to an ArrayList. My code is Here: [URL]
I don't understand why I am getting a ConcurrentModificationException or what one is.
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Aug 27, 2014
I have a student class with fields names and Gender. Now, I have a students' array. such that I can create multiple students' classes: student a, student b, student c e.t.c and store them into the students' array. Now, I store this students' array in a JComboBox and want to only display the names of these students in the array. Such that the JComboBox lists only the names of student a, student b and student c. . When a user clicks on a selected Item on the JComboBox, even though, it was a student's name that was selected, I want the selectedItem to be a object of the Student class. This, I have learnt works with JList by writing your own custom JList models and then DefaultListCellRenderer. Is there anyway, one could also do this with JComboBox?
//Main Method
import StudentList;
import Student;
import ViewGui;
import Controller;
public class SwingMainMethod {
[code]....
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Jul 16, 2014
How can I add values from a JComboBox to a JTable ? I've created a drop down list and a button and I want the values to be added to a table whenever i click on the button (add).
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May 20, 2014
In other words in a table view with several editable columns, when a new row is added this row does not contain any column cells yet. Cells are added on demand once a column gains focus and starts editing. Is this the case? Is there any way to force the row to construct all cells eagerly?
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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]...
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Jul 16, 2014
How can I add values from a JComboBox to a JTable ? I've created a drop down list and a button and I want the values to be added to a table whenever i click on the button (add).
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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]....
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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.
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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.
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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] .....
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May 28, 2014
I have a number of cells which are Dates and need to have them appear in the same format. The samples I have seen usually create a new cell renderer object for each cell, even if its the same type. Since I have a number of Date cells I thought it best to use a single object for each of the date cells, but after seeing the different samples I am wondering if there is something I may be missing where using the same cell renderer object could potentially be an issue.
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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:
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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?
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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?
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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] .....
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Nov 20, 2014
I'm using the tableview-component. The size of font of header is greater then that of cells. The problem is: the width of the column bases on the cell with the longest string and if the header-string is longer then the header gets truncated (it shows ellipsis) and I have to change the width of column manually. How could I solve this problem? The easiest way would be to compute the column-width on myself. I can't find any method in javafx, that would allow to compute the width of string in pixels. In Swing there is the FontMetrics class and Graphics class, so it is easy to get the width in pixels. Are there any pendants to this classes in JavaFX?
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Mar 29, 2014
I'm new to Java and have not been able to figure this out. I'm reading a text file that contains this:
110001 commercial 500000.00 101
110223 residential 100000.00 101
110020 commercial 1000000.00 107
110333 land 30000.00 105
110442 farm 200000.00 106
110421 land 40000.00 107
112352 residential 250000.00 110
The output goes to a text file and should look like this:
COMMERICAL
FARM
LAND
RESIDENTIAL
101 600000.00
105 30000.00
106 200000.00
107 1040000.00
110 250000.00
I'm creating the output file, but it only contains the categories and not the details below them. Cant seem to figure out why.
Java Code:
package propertylistings;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
[Code] ....
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Feb 4, 2015
I built a GUI and after testing it on various platforms I think I would like to make it bigger by a factor of 2.2 or so.
Is there an easy way to just enter the factor 2.2 and have the GUI change by that factor?
I have over 50 components in the GUI. Ideally each one would just enlarge by the factor including the fonts.
This was my first (and only so far) java program. I didn't know anything about layout managers. I used netbeans and it generated all the code.
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