JTabbedPane and JList

Hi,
I'm trying to build an application for a clothing store. I have a JTabbedPane which contains 4 panels (Add,Delete,Modify,Display Customer). Each panel contains a list (JList in a JScroolPane) of customers lastnames. The problem is the following: When I add a customer, the customer list of Add panel is immediately updated (which is good); but when I look at the same list under Delete, Modify, Display panels, the list is not updated. I need to find a way of updating all lists on the panels when one of the lists change in any one panel. Does this make sense? Any suggestions?

Use the Observer/Observable pattern: there is an implementation for JList in the Form of the ListModel (in the pakage javax.swing).
Create a class that implements ListModel and which contains your data, and add, replace and remove functions. Then add that class to the different JLists with
myJList.setListModel(myListModel);or passing myListModel in the constructor of JList. The JList wil then be added to the list of ListDataListeners in myListModel.
For more information on how it works have a look at the apis: http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/ListModel.html

Similar Messages

JTabbedPane and InsertTab method

Hi at all!!!Sorry for my bad english!!
For a university project I want to implement a copy of notepad. Only I want to manage a more document and I think that it is possible through the JTabbedPane and it works.
But I don't know how I can implement a button that add/remove a tab during the runtime.
Is there someone that can help me???
thank u
giuliano

Your main window should have [AddNewTab] and [RemoveTab] buttons.
In their event handler, launch a dialog and accept required user inputs.
After you dispose the dialog, call JTabbedPane#add(), addTab() or remove().

JTabbedPane and removeTabAt() method

Hello,
I use in my application a JTabbedPane and i want allow the user to remove a tab of this JTabbedPane. When the JTabbedPane change i need to perform some traitement.
So i use a ChangeListener to be informed of all changes of my JTabbedPane.
But, when i removed a tab which is not in last or first position i'm not informed by the change.
Thanks for your help.
Guiguch

I had the same problem. I fixed it by overriding the remove() method to fire a StateChanged event:
tabbedPane = new JTabbedPane()
     public void remove(int tab)
          super.remove( tab );
          int after = getSelectedIndex();
          // The selected tab remained the same after this remove, consider
          // it a state changed
          if (after == tab)
               fireStateChanged();
};

JTabbedPane and focus problem.

Hello. I currently have a JTabbedPane which contains the various panels that make up different tabs. These tabs are extensions of panels, and are seperate classes imported into the class which contains my JTabbedPane and then added. The frame which conatins my JTabbedPane also has a button, which when pressed I wish it to look at the tab which is currently active, and call a method from the class which this tab refers to. The problem is that I don't know how to get my button to determine which tab is currently active. Any help will be gratefully recieved.

Use getSelectedComponent() or getSelectedIndex() of your JTabbedPane object.

JTabbedPane and one Button for all Tabs

Hello everybody,
im new here an would say HELLOOO to everyone
So ive got an issue.
I am creating in "class A" tabs for a JTabbedPane. In "class B" i create the JTabbedPane and creat instances of class A and add them to the TabbedPane.
in Class B i also create a button, for save actions. When i click the button, a method "save()" will be called and read from every tab the Strings out of textfields.
My problem now is, that it dont work, i call the save method with the instance from the tab, but it dont getText() from the textfield.
For example:
//create an instance tab, parameter is the save file
Tab myTab = new Tab(file);
//other code
(Tab)myTab.save(); //here i eclipse cast to Tab automatically
the save-Method in class A (Tab):
save() {
sysout(texfield1.getText)
BTW how can i highlight code in this forum?

You can add syntax highlighting by going into the advanced editor, that will add a button for it. Unfortunately there are no quick code tags :/
After you find the button post your ACTUAL code. not just some random snippet which looks like your code. What you posted doesn't even compile.

JTabbedPane, and JPanel.

Hi im going thrue swing tutorials here on sun. And wonder a bit about hierarchy. I use JTabbedPane and every class have there own JPanel that i add to the extended JPanel. I show below with example.
In Main class
public JFrame mstFrame() {
        JFrame frame = new JFrame("Main Frame");
        JTabbedPane mstPane = new JTabbedPane();
        mstPane.addTab("Start", new StartPage());
        frame.add(mstPane);
        frame.setVisible(true);
        return frame;
    }In StartPage Class
public class StartPage extends JPanel {
    JPanel createProjectPanel = new JPanel(new GridBagLayout());
     GridBagConstraints c = new GridBagConstraints();
     JScrollPane createCustomerPane = new JScrollPane();
     c.gridy = 1; // second row
     c.gridx = 0; // first cell
     createProjectPanel.add(createCustomerPane ,c);
add(createProjectPanel);Does this destory the hierarchy, or is it okey to do it this way?

It makes sense to have each tab represented by a panel, so I don't reallly understand the question.
public class StartPage extends JPanel
    JPanel createProjectPanel = new JPanel(new GridBagLayout());
    add( createProjectPanel );However, it is unecessary to create a second panel since your class already extends JPanel. Just add the scrollPane directly to the class.
setLayout( new GridBagLayout() ):
JScrollPane createCustomerPane = new JScrollPane();
add(createCustomerPane, c);

Help with TableRowSorter , JTable and JList

Hello,
I�m developing an application in which I�m using a Jtable and Jlist to display data from a database. Jtable and Jlist share the same model.
public class DBSharedModel extends DefaultListModel implements TableModelFor the Jtable I set a sorter and an filter
DBSharedModel dataModel = new DBSharedModel();
Jtable jTable = new JTable(dataModel) ;
jTable.createDefaultColumnsFromModel();
jTable.setRowSelectionAllowed(true);
TableRowSorter<DBSharedModel> sorter = new TableRowSorter <DBSharedModel> (dataModel);
jTable.setRowSorter(sorter);From what I read until now JavaSE 6 has NOT a sorter for JList (like one for JTable).
So, I am using one from a this article http://java.sun.com/developer/technicalArticles/J2SE/Desktop/sorted_jlist/index.html
When I sort the data from the table, I need to sort the data from the list, too.
My ideea is to make the Jlist an Observer for the Jtable.
My questions are:
1. How can I find if the sorter makes an ASCENDING or DESCENDING ordering?
2. How can I find what the column that is ordered?
Or if you have any idea on how can I do the ordering on Jlist to be simultaneous to Jtable .
Please help!
Thank you

Oh what the hell:
Sun's basic Java tutorial
Sun's New To Java Center. Includes an overview of what Java is, instructions for setting up Java, an intro to programming (that includes links to the above tutorial or to parts of it), quizzes, a list of resources, and info on certification and courses.
http://javaalmanac.com. A couple dozen code examples that supplement The Java Developers Almanac.
jGuru. A general Java resource site. Includes FAQs, forums, courses, more.
JavaRanch. To quote the tagline on their homepage: "a friendly place for Java greenhorns." FAQs, forums (moderated, I believe), sample code, all kinds of goodies for newbies. From what I've heard, they live up to the "friendly" claim.
Bruce Eckel's Thinking in Java (Available online.)
Joshua Bloch's Effective Java
Bert Bates and Kathy Sierra's Head First Java. This one has been getting a lot of very positive comments lately.

ComboBox and JList working to gether?

Hey
Is it possible to get ComboBox and JList to work together?
Eksampel.
In the ComboBox there are 3 options to pick. Football, Hockey and Baseball. When one of these are picked all the names of the players
from for example football is shown in a JList.
Is this possbile? If yes how? can you give example or link to toturial?

do you know a tutorial on this?Did you read the API for either JComboBox or JList????????
Both contain links to the Swing tutorial.
And why is it so difficult to post a Swing related question in the Swing forum???????

Strange UI sticking issue with drag/drop and JList

Hi all,
I have implemented drag/drop between a jtree and jlist. The jtree can accept drops from the jtree (nodes to other parent nodes) and from the jlist. The jlist can accept nodes of the tree being dropped on it.
Let me say this much, it all works. Works fine and great. BUT, the purpose of my post is I am seeing a very strange and not easily reproducible problem.
I should first say that after a successful drop, the list removes the selected items. I do support drag/drop for multiple items.
When I drag items from the list to the tree, reasonbly normal (not too fast), everything seems to work every time. But if I drag an item quickly from the list to the tree, for some reason after the items are removed from the list, another item is selected, sometimes NOT in the place of where the item(s) were selected. Infact, when I drag quickly, I notice the selection changes in the list itself. I only accept tree objects being dropped in the list, so there is no ability to drag/drop list items onto itself, and thus if I drag a list item around the list normally, nothing changes..the item I am dragging stays selected and the cursor shows the drag arrow.
So this problem seems seems odd. I can reproduce it fairly easily, but only when I click and drag quickly.
Anyone have ideas? I don't see where in my list code that as I drag, when drop is done, etc that I select anything in the list. I have tried JDK 1.4.1 and 1.4.2 and it does it in both. I don't see a bug in the bug database for it, and I am not sure its a bug in the JVM or my own code!
Any help is appreciated. Can't really post code as its a large set of code and it is dependent on our company project, so it would take some time to take the code out into its own app to test it again.

Hi,
+" Please note that dropSite==null is a legal value for collection components. dropSite=null and DropOrientation==ON indicates that the drop has happened outside the data portion of the collection component and should be treated as a drop on the entire component Also note that dropSite==null and DropOrientation==AFTER indicates that the drop has happened on an empty collection component and the user intends to append the data."+
http://download.oracle.com/docs/cd/E17904_01/apirefs.1111/e10684/oracle/adf/view/rich/event/DropEvent.html#getDropSite__
List dropRowKey = (List) dropEvent.getDropSite();
        //if no dropsite then drop area was not a data area
        if(dropRowKey == null){
            return DnDAction.NONE;
        }Frank
Edited by: Frank Nimphius on Feb 18, 2011 11:18 PM

JTabbedPane lose JList contents

Hi , this is my first question in the forum :D, i have a problem with a JTabbedPane with two tabs, each with a JList in a JPanel, the problem is that i populate the Jlists in a dynamic way using a vector. the Jlist in the first index (tab) is populated first and then I select the second tab and populate the second Jlist, but when I return to the first tab the Jlist is empty, i guess because it is repainted, which method or what i need to do to keep my JList populated !!

In the future Swing related questions should be posted in the Swing forum.
Without seeing your code we can only guess!
Swing components can't be shared.
You need to create two JLists, one for each tab.
If you need further help then you need to create a [Short, Self Contained, Compilable and Executable, Example Program (SSCCE)|http://homepage1.nifty.com/algafield/sscce.html], that demonstrates the incorrect behaviour.
Don't forget to use the [Code Formatting Tags|http://forum.java.sun.com/help.jspa?sec=formatting], so the posted code retains its original formatting.

Issue with re-sizing JTable Headers, JTabbedPane and JSplit pane

Ok, hopefully I'll explain this well enough.
In my Swing application I have a split pane, on the left hand side is a JTable and on the right hand is a JTabbedPane. In the tabs of the JTabbedPane there are other JTables.
In order to make the rows in the JTable on the left and the JTable(s) on the right line up, the Table Header of all the tables is set to the size of the tallest (deepest?) table header.
Hopefully so far I'm making sense. Now to get to the issue. One of the tables has a number of columns equal to the value on a NumberSpinner (it represents a number of weeks). When this value is changed the table is modified so that it contains the correct number of columns. As the table is re-drawn the table header goes back to its default size so I call my header-resize method to ensure it lines up.
The problem is this: if I change the number of weeks when selecting a tab other than the one containing my table then everything is fine, the table header is re-sized and everything lines up. If I change the number of weeks with the tab containing the table selected, the column headers stay at their standard size and nothing lines up.
To make things more complicated, I also put System.out.println's in as every method called in the process to obtain the size of the table header. And every println returned the same height, the height the table header should be.. So I'm really confused.
Could anyone shed any light on this?
Thanks.

Okay I managed to solve the problem by explicitly revalidating and repainting the table header.
Not sure why it wasnt doing it properly for that table when all the others where fine.
Oh well...

JTabbedPane and JScrollPane problem

Hi all,
I'm trying to make working JScrollPane into JTabbedPane. I have been trying several times to make it but with no acceptable effects :( I attached below the simple code to show what I'm interested in.
PANEL1 has its dimension. I'd like to make that the JScrollPane will be active and enabled to roll when user change JFrame size to less than PANEL1 on pane1.
Please help!
Thanks for everyone,
Greetings,
import java.lang.*;
import java.util.*;
import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class Sample     {
static JFrame fr;
static JPanel pane1, pane2, pane3;
static JLabel AAA, BBB, CCC;
static JPanel PANEL1;
static JTabbedPane panel;
public static void main(String args[])     {
          fr = new JFrame("Sample");
          pane1 = new JPanel();
          pane1.setLayout(null);
          pane2 = new JPanel();
          pane2.setLayout(null);
          pane3 = new JPanel();
          pane3.setLayout(null);
          panel = new JTabbedPane();
          Font myfont1 = new Font("SansSerif",0,20);
          Font myfont2 = new Font("SansSerif",0,15);
          Font myfont3 = new Font("SensSerif",1,15);
          AAA = new JLabel("AAA");
          BBB = new JLabel("BBB");
          CCC = new JLabel("CCC");
          AAA.setFont(myfont2);
          BBB.setFont(myfont2);
          CCC.setFont(myfont2);
          AAA.setBounds(20,20,300,20);
          BBB.setBounds(20,50,300,20);
          CCC.setBounds(20,80,300,20);
          PANEL1 = new JPanel();
          PANEL1.setLayout(null);
          PANEL1.setBackground(java.awt.Color.CYAN);
          PANEL1.setBounds(20,15,250,300);
          PANEL1.add(AAA);
          PANEL1.add(BBB);
          PANEL1.add(CCC);
          pane1.add(PANEL1);
          panel.insertTab("A", null, pane1, null, 0);
          panel.setSelectedIndex(0);
          panel.insertTab("B", null, pane2, null, 1);
          panel.setSelectedIndex(0);
          panel.insertTab("C", null, pane3, null, 2);
          panel.setSelectedIndex(0);
          panel.setBounds(0,0,550,450);
          fr.setLayout(null);
          //fr.setResizable(false);
          fr.setBackground(java.awt.Color.CYAN);
          fr.setForeground(java.awt.Color.CYAN);
          fr.add(panel);
          fr.pack();
          fr.setSize(550, 450);
          fr.setLocationRelativeTo(null);
          fr.setVisible(true);
}

Unfortunately no :( Besides, I can't understand at
all this line:
JTabbedPane (panel)TabbedPane = ... new
w JTabbedPane(...).add/insertTab( ... new
JScrollPane(new JPanel(...)) ... )It's to big cut-off like for me. Can you insert it
into my Sample?
Regards and thanks,It's only my "dev speak". Put a ";" and a var name (, ...) whereever needed, and remove some"()".
(Sorry, normally I don't help dev beginners on so more complex problems, with just an easy answer.)

JTabbedPane and generated code

Hi all -
I am teaching myself Java etc using the free copy of JSE provided so kindly by Sun, and have run into a speedbump that I can get around, but doesn't make me happy at all. If I create a jTabbedPane object in the GUI and add objects to it, they are always called "Tab1", "Tab2", etc etc. No matter what I do, I can't change these default names to what I want. I have tried editing the source in Notepad to no avail.
If I change the Pre-Init code property to add tabbed compnents manually, I can have names I actually want to use - but I have to remove the components from the tabbed pane in the GUI editor. If this was the only way to do it, I would immediately throw this product onto the great steaming pile of almost-useful refuse. However, I can't believe that something that fundamental would have been overlooked by the developers.
There has to be a simple solution. Please help.

Ref: http://www.netbeans.org/kb/faqs/gui-editor.html#FaqFormSettingTabNames
How do I set tab names in a JTabbedPane?
Select the component representing the tab (typically a JPanel) and go to the Layout properties tab in Inspector. You can set tab title here, as well as tooltip and icon. For example, step through the following procedure.
1. Create a new JFrame.
2. Drop a JTabbedPane component onto the JFrame in the Form designer window.
3. Drop a JPanel component onto the JTabbedPane. A tab will appear.
4. In Inspector select the JPanel, then click the Layout tab for the JPanel.
5. The Tab Icon, Tab Title, and Tab Tooltip properties will be exposed, and can be modified.

JTabbedPane and JTextArea

I have a problem, and I can't find what I need.
I have an application that is suppose to be an address book. I've created 26 tabs (lettered A - Z) and in each tab, I've placed a JPanel (e.g. panelA, panelB, etc) and on each panel I've placed a JTextArea and a JList . I load my data from a file into a Vector.
Here's my dilemma, I don't know how to get my data from my Vector to my JTextArea or my JList. If I instantiate a new JList and place it on the tab, it adds it as a new JList.
I can get the tab via getSource(), but I don't know how to access the JTextArea or the JList in the tab.
I can sort my Vector, print it out via System.out.println's, shoot, I can even pull out specific elements that correspond to a specific letter (the person who's last name starts with "M" for instance), but getting it into the JList or putting it in the JTextArea eludes me. Any help would be greatly appreciated.

1) Create a custom panel (MyAddressPanel). Add the JList and JTextArea to the Panel
2) Create a couple of accessor method (getAddressList, getAddressTextArea) to access any component you add to the panel
3) Add each panel to the tabbed pane
Now whenever you want to access the data from a specific tab you would do something like:
int selected = tabbedPane.getSelectedIndex()
MyAddressPanel panel = (MyAddressPanel)tabbedPane.getComponentAt(selected);
JList list = panel.getAddressList();
...

JTabbedPane and JScrollPane

I am trying to add a JScrollPane inside a tab in a JTabbedPane.. unsuccessfully
the JScrollPane has a JTextArea added to it...
     // tp previously declared as a JTabbedPane....
    JScrollPane jpC = new JScrollPane();
    JTextArea jtC = new JTextArea(--text source--);
    jpC.add(jtC);
    tp.addTab("Constructors",
              null,
              jpC,
              "View all Constructors");on switching to the tab, it is blank.....
the tab works fine when I simply have a simple JTextArea inside it, but it is not an option
    JTextArea jtC = new JTextArea(--text source--);
    tp.addTab("Constructors",
              null,
              jtC,
              "View all Constructors");essentially what I need is to have a scrollable peice of text in all of my panes.... any idea what might be going wrong?
I even tried declaring a new container, adding the scrollpane (with the textarea inside) to it and then creating the tab.. same result.. i understand that a tabbedpane can only contain exactly one component, so i thought this might be a work-around...
thanks in advance,
K

Thanks for the quick reply.....
actually the solution was quite illogical (IMHO!)
all i had to do was type cast the freaking thing to (Component)!!!!!!!
    JTextArea jtC = new JTextArea(-- text source --);
    JScrollPane jpC = new JScrollPane(jtC);
    tp.addTab("Constructors",
              null,
              (Component)jpC,
              "View all Constructors");again, thanks for the prompt reply!
Kunal

JTabbedPane and JList

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