jcombobox

Can I modify JComboBox popup background color of an existing object?

由 让人想犯罪 __ 提交于 2019-12-05 10:21:25
I have an existing JComboBox object. I can modify many of its properties using the internal methods. However, I could not find similar methods to customize the popup's appearance - specifically, the popup's background color. I have an existing object, so I wish to use its existing methods/properties, not to write a dedicated class. Is this possible? Note: this question is NOT the same as the linked question above (which incorrectly states that this question already has an answer): that question asked about the selected item 's bgcolor (in the combobox's editbox); I am asking about the popup

The correct way to populate a JComboBox?

由 馋奶兔 提交于 2019-12-05 08:27:20
I am currently building an application in Java on Eclipse as a self help guide to programming fundamentals and basic java programming, this is purely educational and for the sole purpose of being able to reference topics easily and practice my programming as I learn them by programming them into this tutorial application. The content of the application will expand as time goes on and as I learn more components of programming. So my first question comes down to correct form. I am using a drop down box ( JComboBox ) so as to select specific topics from within the GUI. I would like to populate

JTable, JComboBox using custom Objects

由 陌路散爱 提交于 2019-12-05 07:19:33
Hi if You put JComboBox in JTable and String[] array to JComboBox everything works fine. Buf if You put your own data type to JComboBox selecting values in same column becomes complicated. Here is official example . Try changing following part: JComboBox comboBox = new JComboBox(); comboBox.addItem("Snowboarding"); comboBox.addItem("Rowing"); comboBox.addItem("Knitting"); comboBox.addItem("Speed reading"); comboBox.addItem("Pool"); comboBox.addItem("None of the above"); sportColumn.setCellEditor(new DefaultCellEditor(comboBox)); Into: JComboBox comboBox = new JComboBox(); comboBox.addItem(new

Want to set default value selected in JComboBox populated by enum

由 徘徊边缘 提交于 2019-12-05 06:13:33
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.. cbImportCountry.setSelectedItem(EbayContryEnum.FR); cbImportCountry.setSelectedItem(EbayContryEnum.FR); Maybe you are not looking for assign the value to the combobox. You are looking for casting your

JcomboBox multiple selection

由 主宰稳场 提交于 2019-12-05 01:19:06
I have a jcombobox in my application. and i want it to support multiple selection (like it do in a jlist). is there any code example? Alberto Solano I think it's not possible, unless you use a JList, like you said. The JComboBox API reports: The user can select a value from the drop-down list, which appears at the user's request. And a JComboBox tutorial : Lists are not terribly attractive, but they're more appropriate than combo boxes when the number of items is large (say, over 20) or when selecting multiple items might be valid. Update: I reviewed this answer, because actually it's

Java Currency Converter GUI

由 旧城冷巷雨未停 提交于 2019-12-04 18:44:12
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; private String[] Currency = { "USD - United States Dollar", "GBP - Great Britain Pound", "AUD -

Removing all Items from a combo box in Java

由 二次信任 提交于 2019-12-04 13:47:34
问题 I need to remove all items from the combo box int itemCount = combo.getItemCount(); for(int i=0;i<itemCount;i++){ combo.removeItemAt(0); } This code will remove all items except the last one. It gives a NullPointerException. How to fix that? 回答1: The code in the question would normally work. However, it looks like a threading issue. Another thread may be messing with the items. However, I sugeest you should better use the removeAllItems(); method: combo.removeAllItems(); 回答2: How about

how to add jcombobox to jtable column in netbeans

由 吃可爱长大的小学妹 提交于 2019-12-04 12:58:38
问题 I want to add jcombobox to jtable please someone explain me how could i do that in netbeans 回答1: Add a JComboBox by dragging and dropping outside the frame or panel.So that it will be added to OtherComponents in the Navigator View Add whatever contents you want to add by double clicking the combobox from Navaigator View Then rightclick on JTable and click TableContents In the Dialog select Columns Tab(1) and select the column(2) you want to add the combobox to. Then Click on the button near

How to set the title of a JComboBox when nothing is selected?

由 妖精的绣舞 提交于 2019-12-04 12:31:23
问题 I want to have a JCombobox in my Swing application, which shows the title when nothing is selected. Something like this: COUNTRY ▼ Spain Germany Ireland I want "COUNTRY" to show when the selected index is -1 and thus, the user wouldn't be able to select it. I tried to put it on the first slot and then overriding the ListCellRenderer so the first element appears greyed out, and handling the events so when trying to select the "title", it selects the first actual element, but I think this is a

Adding JCombobox in Jtable and Getting that Row and Column in Swing java

由 柔情痞子 提交于 2019-12-04 11:57:08
I have One Jtable in which i have added JComobox like this. TableColumn sportColumn = jTable1.getColumnModel().getColumn(2); comboBox = new JComboBox(); comboBox.addItem("Snowboarding"); comboBox.addItem("Rowing"); comboBox.addItem("Chasing toddlers"); comboBox.addItem("Speed reading"); comboBox.addItem("Teaching high school"); comboBox.addItem("None"); sportColumn.setCellEditor(new DefaultCellEditor(comboBox)); and i have added one mouse event of jtable like this. private void jTable1MouseClicked(java.awt.event.MouseEvent evt) { // TODO add your handling code here: try { int row = jTable1
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