jcombobox

Java ComboBox Different Value to Name

十年热恋 提交于 2019-12-07 03:56:29
问题 I have a Java combo box and a project linked to an SQLite database. If I've got an object with an associated ID and name: class Employee { public String name; public int id; } what's the best way of putting these entries into a JComboBox so that the user sees the name of the employee but I can retreive the employeeID when I do: selEmployee.getSelectedItem(); Thanks 回答1: First method: implement toString() on the Employee class, and make it return the name. Make your combo box model contain

Want to set default value selected in JComboBox populated by enum

放肆的年华 提交于 2019-12-07 01:03:04
问题 Below statement in if condition is not working, please provide me some solution that how to set selected item for JComboBox which are populated by ENUM. public enum EbayContryEnum { AT (3), AU (4), BE (5), CA (7), CH (14), DE (11), ES (13), FR (10), IE (2), IT (12), NL (16), UK (15), US (1); } for ex:- if(country.equals("FR")) { cbImportCountry.setSelectedItem("FR"); } But it's not working.. 回答1: cbImportCountry.setSelectedItem(EbayContryEnum.FR); 回答2: cbImportCountry.setSelectedItem

Java Currency Converter GUI

自作多情 提交于 2019-12-06 12:48:10
问题 I'm trying to make a simple java currency converter GUI. So far I have this :(4 parts) How would I set the values for each item in the jcombbox (ex. each currency) so that I can use them to calculate the conversion? Here's the first part (1 combobox): import java.awt.*; import java.awt.event.*; import javax.swing.*; public class test extends JPanel { private JPanel panel; private JLabel messageLabel; private JTextField USDTextField; private JPanel CurrencyPanel; private JComboBox CurrencyBox;

Get Value from JComboBox

坚强是说给别人听的谎言 提交于 2019-12-06 11:52:27
问题 I have JComboBox with 2 columns and I have JButton . When I click the JButton , I need to get the result of the JComboBox selected value from first column and seconds column separately... How do I this? Also: how do I set the header of that JComboBox ? The Code: public class Combo extends JFrame implements ActionListener{ private JComboBox combo = new JComboBox(); private JButton button = new JButton(); public Combo() { setLayout(new FlowLayout()); combo.setRenderer(new render()); add(combo);

How to prevent JComboBox drop-down list from exceeding vertical screen size

老子叫甜甜 提交于 2019-12-06 11:08:08
I use a JComboBox with many entries (hundreds). I want to limit the size of its drop-down list to the vertical size of the screen. Using a fixed size does not work out properly for different look&feels and screen resolutions. I am using Java 6u25 on Windows 7. If I set the maximum row count to a value (e.g. 100) that exceeds the number of list items (=rows) that fit on the screen (75), the drop-down list seems to be drawn in full size but the lowest entries are never visible. Here is a screenshot for illustation (thanks for the SSCCE by @trashgod). The sceenshot was taken in a virtual machine

Customizing JComboBox: “infinite loops event” when LAF is system LAF

萝らか妹 提交于 2019-12-06 11:02:46
I customize my JComboBox as follow. The program ran ok with default LAF, but whenever i changed the LAF to System LAF (another LAF, Nimbus, is ok), there was an infinite loop after the button was clicked. I saw that the actionPerformed method was called infinitely. Please help me solving this problem. I use jdk 1.6.0_33 I'm so sorry if there is any unclear mean. My English is not good Thanks in advance. package sig.dw.ui; import java.awt.Component; import java.awt.FlowLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.swing.ComboBoxEditor; import

Making JComboBox transparent

故事扮演 提交于 2019-12-06 10:36:17
I have a problem with making JComboBox transparent. I tried setting opaque to false and alpha of background 0 but it doesnt work. I guess that i need to change some class that does rendering or something similar.And here is the code.. import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Rectangle; import javax.swing.JFrame; import javax.swing.JComboBox; import javax.swing.JTextField; import javax.swing.plaf.basic.BasicComboBoxUI; import java.awt.Color; public class App { private JFrame frame; public static void main(String[] args) { EventQueue.invokeLater(new Runnable() {

Java JTable with JComboBox

。_饼干妹妹 提交于 2019-12-06 09:55:26
I'm trying to place a JComboBox inside a certain column of a JTable. I have this code, and it is working: model = new DefaultTableModel(); JComboBox<String> optionComboCell = new JComboBox<String>(); optionComboCell.addItem("Option 1"); optionComboCell.addItem("Option 2"); optionComboCell.setSelectedIndex(1); table = new JTable(model); // Adding here all the columns, removed for clarity model.addColumn("Options"); TableColumn optionsColumn = table.getColumn("Options"); optionsColumn.setCellEditor(new DefaultCellEditor(optionComboCell)); My problem with this, is that it doesn't show as

JComboBox popup menu not appearing

微笑、不失礼 提交于 2019-12-06 08:56:44
I have a JComboBox inside a JPanel (which itself is nested within a few other JPanels). It's populated with members of an enum. I'm running into a problem where the popup menu doesn't appear when I click the expand button. Here's the information I've gathered so far: 1) The first click on the expand button does nothing. The second click highlights the contents of the box, but the popup still doesn't appear. 2) Once I've clicked the button and given it focus, up/down keystrokes cycle through the entries correctly. 3) I've tried adding a PopupMenuListener to print out events, and the events fire

Remove JCombobox border inside JTable

北城以北 提交于 2019-12-06 08:05:47
I have removed the arrow button from the JComoboBox to make it look like a JTextField and added it as a celleditor. The purpose is it create an AutoSuggest(not AutoComplete) JTable cell. On Doing that the border kinda looks irking.How to change the border to make it look like textfield border on the right. I have tried removing the border created line border. But its not removing the blueish border. Using Nimbus UI. MCVE for the problem import java.util.logging.Level; import java.util.logging.Logger; import javax.swing.BorderFactory; import javax.swing.DefaultCellEditor; import javax.swing