jcombobox

How do I populate a JComboBox with an ArrayList?

由 ε祈祈猫儿з 提交于 2019-11-26 09:50:49
问题 I need to populate a JComboBox with an ArrayList. Is there any way to do this? 回答1: Use the toArray() method of the ArrayList class and pass it into the constructor of the JComboBox See the JavaDoc and tutorial for more info. 回答2: Elegant way to fill combo box with an array list : List<String> ls = new ArrayList<String>(); jComboBox.setModel(new DefaultComboBoxModel(ls.toArray())); 回答3: I don't like the accepted answer or @fivetwentysix's comment regarding how to solve this. It gets at one

How to add unique JComboBoxes to a column in a JTable (Java)

由 断了今生、忘了曾经 提交于 2019-11-26 08:31:08
问题 I am trying to add unique JComboBoxes to a column in a JTable . I know it is possible to add a JComboBox to an entire column using TableColumn col = table.getColumnModel().getColumn(columnNumber); col.setCellEditor(new MyComboBoxEditor(values)); but I need each JComboBox to be different and have different Strings inside it. Any ideas? 回答1: Override the getCellEditor(...) method. For example; import java.awt.*; import java.awt.event.*; import java.util.List; import java.util.ArrayList; import

Dynamically adding items to a JComboBox

由 依然范特西╮ 提交于 2019-11-26 08:24:19
问题 Vector comboBoxItems = new Vector(); DefaultComboBoxModel model; // ComboBox Items have gotten from Data Base initially. model = new DefaultComboBoxModel(ComboBoxItems); JComboBox box = new JComboBox(model); I added this combo box to a panel. If I add some items in the database directly, I want those newly added items shown in the combo box. I can see the values in comboBoxItems when I debug, but those values do not appear in my combo box. How can I get those newly added values into the combo

How can I change the arrow style in a JComboBox

由 折月煮酒 提交于 2019-11-26 05:36:30
问题 Let\'s say I want to use a custom image for the arrow in JComboBox, how can I do this? I understand it\'s possible using the synth xml files, or maybe even UIManager.put(...), but I don\'t know how. All I want to do at this time is change the arrow image to something else, either programatically or even just overriding the image it uses. How exactly can I do this? 回答1: You can override createArrowButton() in BasicComboBoxUI. BasicArrowButton is a convenient starting point. class ColorArrowUI

JComboBox autocomplete

由 坚强是说给别人听的谎言 提交于 2019-11-26 05:33:37
问题 How do I perform auto-complete in editable JComboBox in Netbeans 7.1 like in ComboBox in VB dot net. I have a combo box with a list binding, I want to select item by typing only some first letter of the item in the list for example if a list has kitten , then it should be chosen when I type ki . 回答1: If you want to do this yourself, you can follow the steps explained in this article. this.comboBox = new JComboBox(new Object[] { "Ester", "Jordi", "Jordina", "Jorge", "Sergi" });

How to set Icon to a JLabel from an image from a folder?

由 天大地大妈咪最大 提交于 2019-11-26 03:45:10
问题 I am trying to set an icon to a JLabel from a folder of images whenever an item is selected from a JComboBox. The name of items in the JComboBox and name of the images in the folder are same. So whenever an item is selected from the JComboBox, the corresponding image with the same name should be set as an icon to the JLabel. I am trying to do something like this. private void cmb_movieselectPopupMenuWillBecomeInvisible(javax.swing.event.PopupMenuEvent evt){ updateLabel(cmb_moviename

Dynamic JComboBoxes

由 ↘锁芯ラ 提交于 2019-11-26 01:20:00
问题 I have following data (String): Course1: A1 Course1: A2 Course2: B1 Course2: B2 Course2: B3 Course2: B4 Course3: C1 Course3: C2 I\'d like to create two JComboBox (JComboBox1, JComboBox2) so that JComboBox1 contains Course1,Course2,Course3, etc. If I select, say, Course2 from JComboBox1 then corresponding B1,B2,B3,B4 should be populated in JComboBox2. How to implement this? Many Thanks. 回答1: Yes, simply create a DefaultComboBoxModel for each set, and do setModel() on JComboBox2 when JComboBox1

Is it possible to have an autocomplete using jtextfield and a Jlist?

由 依然范特西╮ 提交于 2019-11-26 00:19:38
问题 I want to create an auto-complete program in java which should provide a list of suggestions instantly when the user types a character/String inside a JTextfield . The problem is that I am confused on how to do it. Could somebody provide an idea or a sample on the said problem? 回答1: 1) you have to sort your array before use for better performance... 2) as I mentioned you have to take these two clasess 3) don't forget set initial value for better and nicest work with these Components simple

How do I get the CellRow when there is an ItemEvent in the JComboBox within the cell

由 一笑奈何 提交于 2019-11-25 23:05:58
问题 I have a JTable with a column containing a JComboBox. I have an ItemListener attached to the JComboBox which acts upon any changes. However, ItemListener does not have a method for obtaining the Row that the changed ComboBox is within. I need to Row number in order to act upon another column in the same row when the ComboBox has a change. Any help would be appreciated. This is my Short and Concise code. What I am trying to accomplish, is obtaining the Table Row of the ComboBox when a the

JComboBox Selection Change Listener?

由 橙三吉。 提交于 2019-11-25 22:05:14
I'm trying to get an event to fire whenever a choice is made from a JComboBox . The problem I'm having is that there is no obvious addSelectionListener() method. I've tried to use actionPerformed() , but it never fires. Short of overriding the model for the JComboBox , I'm out of ideas. How do I get notified of a selection change on a JComboBox ?** Edit: I have to apologize. It turns out I was using a misbehaving subclass of JComboBox , but I'll leave the question up since your answer is good. jodonnell It should respond to ActionListeners , like this: combo.addActionListener (new
订阅 jcombobox