jcombobox

问题 How can I show a tree inside a JComboBox popup? Here is example tree: Theoretical computer science Mathematical logic Automata theory Algorithms and data structures Analysis of algorithms Algorithms 回答1: There is no default way to put a tree in a combo box. There are a couple of options: If you can give allowing expansion of nodes, you can achieve a similar effect by adding space before some of the options in a standard JComobBox. Or even space and a dash in front of leaf options. If you need

问题 How can I show a tree inside a JComboBox popup? Here is example tree: Theoretical computer science Mathematical logic Automata theory Algorithms and data structures Analysis of algorithms Algorithms 回答1: There is no default way to put a tree in a combo box. There are a couple of options: If you can give allowing expansion of nodes, you can achieve a similar effect by adding space before some of the options in a standard JComobBox. Or even space and a dash in front of leaf options. If you need

问题 I have a JTable in which the first column contains combobox with same items in each cell.If i select an item in a cell combobox i need to remove the selected item from all the other combobox in that column and also add the previous selected item to all the other combobox.How should i do that?Please help me with an example. public class Save extends JFrame { String[] items1 = new String[] { "Cash", "Bank1", "Bank2" ,"Bank3"}; TableCellEditor editors; DefaultTableModel dtmFunds; private

问题 I'm using a custom BasicComboBoxRenderer for a JComboBox and I've changed the appearance of the items of the drop-down list. However these changes also apply to the single top item that shows in the combobox (don't know how to call it). I want the top item to be independent of the other items in the list, if possible. I would also like to get rid of the top item's blue color when it is focused (setFocusable(false) is not what I want). I've tried to use the "renderer index" (-1) to affect the

来源： https://stackoverflow.com/questions/64541587/lookandfeel-blocking-jcombobox-background-change

来源： https://stackoverflow.com/questions/64578854/jcombobox-padding-spacing-between-arrow-and-label

来源： https://stackoverflow.com/questions/22224000/how-to-fire-property-change-listener-if-old-and-new-values-are-equal-in-swing-jc

来源： https://stackoverflow.com/questions/22224000/how-to-fire-property-change-listener-if-old-and-new-values-are-equal-in-swing-jc

问题 Is there a method for a combobox in Java that will center the items in the combobox? I tried this but it didn't work: myCombobox.setAlignmentY(CENTER_ALIGNMENT); Thanks! 回答1: Try this link: How to Use Combo Boxes (The Java™ Tutorials > Creating a GUI With JFC/Swing > Using Swing Components) class ComboBoxRenderer extends JLabel implements ListCellRenderer { public ComboBoxRenderer() { setOpaque(true); setHorizontalAlignment(CENTER); setVerticalAlignment(CENTER); } //. . . or ((JLabel)comboBox

问题 I am running into an issue with adding a ArrayList into a JComboBox. Can someone give some advice on how to proceed? I can't seem to get the ArrayList to go into the ComboBox. What are the different ways to work with populating JCombobox's with arrayLists? HotelSystem.Java package hotelManage; import java.awt.*; import java.awt.event.*; import java.util.ArrayList; import javax.swing.*; public class HotelSystem extends JFrame implements ActionListener { /** * */ private static final long