我有一个表有两列 - id
和desc
。是否有可能在JComboBox中向用户显示desc
列值的列表,并且当用户从列表中选择一个项目并单击某个按钮时,我会得到相应的id
值?JComboBox提交价值喜欢HTML选择
也就是说,在Swing中可以这样做吗?
<select>
<option value="1">Hi</option>
<option value="2">Hello</option>
</select>
当用户点击Hello时,我需要2作为值。
我有一个表有两列 - id
和desc
。是否有可能在JComboBox中向用户显示desc
列值的列表,并且当用户从列表中选择一个项目并单击某个按钮时,我会得到相应的id
值?JComboBox提交价值喜欢HTML选择
也就是说,在Swing中可以这样做吗?
<select>
<option value="1">Hi</option>
<option value="2">Hello</option>
</select>
当用户点击Hello时,我需要2作为值。
以下是使用JComboBox的示例。这个概念是一个JList相同:
import java.awt.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
import javax.swing.plaf.basic.*;
public class ComboBoxItem extends JFrame implements ActionListener
{
public ComboBoxItem()
{
Vector model = new Vector();
model.addElement(new Item(1, "car"));
model.addElement(new Item(2, "plane"));
model.addElement(new Item(3, "train"));
model.addElement(new Item(4, "boat"));
JComboBox comboBox;
// Easiest approach is to just override toString() method
// of the Item class
comboBox = new JComboBox(model);
comboBox.setDragEnabled(true);
comboBox.addActionListener(this);
getContentPane().add(comboBox, BorderLayout.NORTH);
// Most flexible approach is to create a custom render
// to diplay the Item data
comboBox = new JComboBox(model);
comboBox.setDragEnabled(true);
comboBox.setRenderer(new ItemRenderer());
comboBox.addActionListener(this);
getContentPane().add(comboBox, BorderLayout.SOUTH);
}
public void actionPerformed(ActionEvent e)
{
JComboBox comboBox = (JComboBox)e.getSource();
Item item = (Item)comboBox.getSelectedItem();
System.out.println(item.getId() + " : " + item.getDescription());
}
class ItemRenderer extends BasicComboBoxRenderer
{
public Component getListCellRendererComponent(
JList list, Object value, int index,
boolean isSelected, boolean cellHasFocus)
{
super.getListCellRendererComponent(list, value, index,
isSelected, cellHasFocus);
if (value != null)
{
Item item = (Item)value;
setText(item.getDescription().toUpperCase());
}
if (index == -1)
{
Item item = (Item)value;
setText("" + item.getId());
}
return this;
}
}
class Item
{
private int id;
private String description;
public Item(int id, String description)
{
this.id = id;
this.description = description;
}
public int getId()
{
return id;
}
public String getDescription()
{
return description;
}
public String toString()
{
return description;
}
}
public static void main(String[] args)
{
JFrame frame = new ComboBoxItem();
frame.setDefaultCloseOperation(EXIT_ON_CLOSE);
frame.pack();
frame.setVisible(true);
}
}
或者你总是可以使用一个JTable来存储数据,只是删除第一个TableColumn的来回的TableColumnModel所以它不是在表中可见。
您可以将任何对象传递给您的JList。
例如为:
public class myListItem {
private String text;
private int id;
public String toString() {
return text;
}
...getters/setters and constructor....
//Add to list:
JList myList = new JList();
myList.setSelectionMode(ListSelectionModel.SINGLE_SELECTION);
DefaultListModel listModel = new DefaultListModel();
listModel.addElement(new MyListItem("one", 1);
listModel.addElement(new MyListItem("two", 2);
lst_scans.setModel(listModel);
lst_scans.setSelectedIndex(0);
//Obtain selection:
MyListItem item = (MyListItem) myList.getSelectedValue();
哇...在SO camickr!刚注意到.. !! – 2010-08-10 06:57:28