problem about jcombobox-Collection of common programming errors

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  rciafardone
  java swing jlist jcombobox
  I use both JList and JComboBox in diferent places. The content of both change dinamicaly.Once a comboBox is created you cant just say comboBox.setModel(String[]), you have to create a new model and then set it to the comboBox.Same happens with the JList.Rather than creating my own Jlist and ComboBox just to add a new method called .setNewModel(String[]) i created a static method in my “utility” class that receives a String[] and returns a ListModel.So i can do this:someComboBox.setModel((ComboBo
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  NathanChristie
  java swing jcombobox selectedindex
  I want to set the selected index in a JComboBox by the value not the index. How to do that? Examplepublic class ComboItem {private String value;private String label;public ComboItem(String value, String label) {this.value = value;this.label = label;}public String getValue() {return this.value;}public String getLabel() {return this.label;}@Overridepublic String toString() {return label;} }JComboBox test = new JComboBox(); test.addItem(new ComboItem(0, “orange”)); test.addItem(new ComboItem(1, “pe
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  Kumar Vivek Mitra
  java swing jcombobox
  i am using jcombobox from swing and getting some unexpected output from getSelectedIndex method. when i select the 1st JComboBox then the 2nd combobox get enabled and i am using a method getSelectedIndex() which is showing some unexpected output. I mean it should show “0” but it is showing “0” then “-1” then an exception and then finally “0”. i can’t figure out the cause of exception. I am showing here only part of code hope you guys got me…public Tester() {super(“Utility for publish_date”);
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  shift66
  java swing jcombobox
  I have a JCombobox and I’m adding some items at runtime. Some of them are very long and my Jcombobox is growing very long too. It’s in a JPanel container with BoxLayout (PAGE_AXIS). I have no idea how to prevent growing… I wonder there should be a property like overflow and in combobox item will be shown like “123…” if it’s “123456789”.EDIT: I read your answers, thank you very much. But the problem is that my JPanel can resize and I need to make it’s children always fill parent. So I cant s
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  mKorbel
  java swing arraylist jcombobox comboboxmodel
  I want the combobox to store the name from database at runtime,so i creted a list but combobox is displaying an error… List<String> s = new ArrayList<String>();{try{Class.forName(“sun.jdbc.odbc.JdbcOdbcDriver”);Connection con =DriverManager.getConnection(“jdbc:odbc:project”,”sa”,”123456″);Statement stmt= con.createStatement();ResultSet rs=stmt.executeQuery(“SELECT Name FROM company”);i=0;while(rs.next()) {s.add(rs.getString(“Name”));}}catch(Exception ex) { {JOptionPane.
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  Dan
  java swing user-interface jcombobox
  This is my jComboBox:jComboBox1.setModel(new javax.swing.DefaultComboBoxModel(new String[] { “3”, “4” }));jComboBox1.addActionListener(new java.awt.event.ActionListener() {public void actionPerformed(java.awt.event.ActionEvent evt) {jComboBox1ActionPerformed(evt);}I want to get the value selected that is 3 or 4 and convert it into float?This is what I have tried:a = Float.parseFloat(jComboBox1.getActionCommand());but it doesn’t seems to be working.
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  Hossain Margani
  java applet jcombobox
  I am developing an applet, and use some panels, which according to some situations some panels are shown or hidden. in one panel I have a JComboBox which I fill them at runtime. my problem is when I show this panel, the JComboBox is filled, and enabled, but I cannot drop it down. I tested it on a simple applet, but it was correct, but I don’t know why it does not show in my applet.Please help me.Thanks.
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  user1329572
  java swing jcombobox
  I would like to change the contents of the list of a JComboBox (like adding another list in place of and older one). Is there any way I might be able to do that? Thanks in advance!
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  kleopatra
  java swing jcombobox
  In my java program I have some comboboxes whose items are inserted at runtime from the database. The problem is that i have some more buttons, radiobuttons, etc. When I click on then the item of the combobox changes to 1st item (default). Why is this happening?
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  arpanoid
  java swing gui jcombobox jcomponent
  I am working on a big application with lots of components in it. I am trying to add a comboBox at one place and Container is removing that component before it is visible. I read some where that Java Swing validates and removes the component if it is aded somewhere else. How does that exactly works ? I am sorry but I guess this problem is too abrupt and I am not able to provide any code.P.S. checked every property of component,panel and container and there is nothing which is affecting the visibi
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  Andrew Thompson
  java swing user-interface jcombobox
  Alright so I’m trying to create a combo box that will update it’s contents during runtime except I have no clue how to do this without receiving a bunch of errors. Is there some sort of method that I can use in order to accomplish this? For example, I have a vector that might start out with the name in drawers 1 and 2 be hi and bye. Then during runtime the program will change drawer one and two to eggs, sausage and add a third drawer with the name being computer. How can I go about changing
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  Samsquanch
  java final jcombobox
  I’m receiving the error “local variable box is accessed from within inner class; needs to be declared final”. That seems alright, but I don’t really think it’s the best solution, so I was hoping maybe someone else can help me out. Here is my code:public void showPublisherBox(JComboBox box) {if (publisherBox == null) {publisherBox = new AddPublisherForm();publisherBox.setLocationRelativeTo(this);}publisherBox.addWindowListener(new WindowAdapter(){public void windowClosing(WindowEvent we){this.pop
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  Grains
  java swing jcombobox
  I have a JComboBox with only one value in the start and have one MouseListener connected to it. When I click on the JComboBox I fill it with some new values. But the popupMenu are of the size of one element on the first click on the JComboBox. The second time all values will appear as normal. Any idea how I can make the comboBox update its popupMenu directly after I have updated its content?Example program:public class ComboBoxUpdate extends JFrame implements MouseListener {private JComboBox<
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  Michael Myers
  java swing jcombobox jslider
  Ok, I will post the code for the three classes as it’s not too long. package guiDemonstration;import java.awt.*; import java.awt.event.*; import javax.swing.*; import javax.swing.event.ChangeEvent; import javax.swing.event.ChangeListener;public class TabbedGUI {//create fieldsprivate JFrame frame;private JTabbedPane tabbedPane;//make the following three labels public for access in the GUIEngine classprivate JLabel comboLabel; private JLabel sliderLabel; private JLabel radioLabel; private JSlider
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  Bill the Lizard
  java swing jcombobox
  I add a JComboBox to a JPanel (in the JComboBox constructor I load array of strings). How can I change that array at runtime, to load new items?
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  nIcE cOw
  java swing jtable jcombobox
  Actually i have a JTable in which one Column has ComboBox , what i want is to change the values of JTable’s ComboBox at runtime , on the CheckBox value changed event , I am calling the function which gets me New Values For Combo but there is no change in the values. util.RefreshReplicatedDataAndHeader(true,objVector,-1,this, jScroll_ProductStone.getName()); is the function which gets me JTable Data. It is calling AddComboBoxForJTable. I am provide the part of the code which i am using for ch
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  Binyamin Sharet
  java gui swing jcombobox
  I’m trying some GUI development in Java and when I added the following code, I got a runtime error during initialization of the class:public class Search_Album_Main_Tab extends JPanel{JComboBox search_list;JTextArea searched_data;JButton search_button;Results_Main_Tab rmt;Search_Action_Listener listener;public Search_Album_Main_Tab(Results_Main_Tab results_main_tab){String[] search_options = {“Album”, “Artist”, “Genre”, “ID”, “Year”};setLayout(new GridLayout(3,1));rmt = results_main_tab;
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  Akki
  java swing jcombobox
  1.I have created an JComboBox and Jtable when user select items from JComboBox they are added in the JTable.2.I dont want to allow the user to select the items that have been previously selected by him in JComboBox.3.So the selected choices must be disabled (not chooseable). How should i do this? 4.The below code removes that selected item from JComboBox after it has been added in JTable but i am interested in disabling itString getchoice=(Stri
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  Andrew Barber
  java swing event-handling jcombobox
  I have a JComboBox which it’s items are updating with other parts of program every second. I need a listener when the user tried to type anything there or tried to select an item from JComboBox it updates it’s content and show the new items added. I used actionPerformed but it is bringing new items but user can not select then I used itemStateChanged but the program crashed and I had to close netbeans!Answer: My JcomboBox was on the JPanel. The best way I figure out was to add the listener on JP
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  mKorbel
  java swing fonts jcombobox fontsize
  I have created a JFrame where the user can edit text in a JTextArea. There is a JComboBox to change font type, a JComboBox to change font size, and 2 JCheckBoxes to make the text Bold and Italic. I have finished the JCheckBoxes, but I cannot figure out how to allow change font and font size by using the JComoboBoxes. Any help would be appreciated. import javax.swing.*;import java.awt.*;import java.awt.event.*;public class SetFontModified extends JFrame {private JPanel p1, p2;private JLabel jlblF
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  Elizabeth Turner
  java swing nullpointerexception jcombobox
  I’m trying to create my little box that shows the color when selected from the combo box. But I keep getting this error of NullPointerException when I try to run the program. I don’t see what is wrong with it.import java.awt.*; import java.awt.event.*; import javax.swing.*;public class ThreeColorsFrame extends JFrame {private static final int FRAME_WIDTH = 300;private static final int FRAME_HEIGHT = 400;private JComboBox box;private JLabel picture;private static String[] filename = { “Red”, “Blu
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  mKorbel
  java swing autocomplete jtable jcombobox
  I have strange problem. I have class which behaves similar dropdown list.package test.view;import java.awt.Color;import java.awt.Component;import java.awt.event.FocusAdapter;import java.awt.event.FocusEvent;import java.awt.event.KeyAdapter;import java.awt.event.KeyEvent;import java.util.List;import javax.swing.ComboBoxModel;import javax.swing.JComboBox;import javax.swing.JFrame;import javax.swing.JPanel;import javax.swing.JTable;import javax.swing.JTextField;import javax.swing.table.TableCellRen
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  Andy
  java swing awt jcombobox actionlistener
  I am trying to add an ActionListener to a JButton in the standard way: outside of the method I have private Actions listener;and inside of the method I have put listener = new Actions(); // Create the action listener object // Add action listeners to the necessary componentsisDatabaseDefault.addActionListener(listener);addEntry.addActionListener(listener);editEntry.addActionListener(listener);deleteEntry.addActionListener(listener);addDatabase.addActionListener(listener);editDatabase.addActionLi
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  WATTO Studios
  java autocomplete jcombobox illegalargumentexception
  I always get an error of my Auto Completing JComboBox. To auto complete my jcombobox i used this script of http://w_w.orbital-computer.de/JComboBox/. When I create them i do it like this:final Object[] elements = new Object[] {“Please refresh your list”}; comboBox[i] = new JComboBox(elements); comboBox[i].setEditable(true); new AutoCompleteJComboBox(comboBox[i]);It works fine if i just use it with new jcomboboxes, but if i change their values like this:comboBox

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