如何用java做一个CheckComboBox

Question

就是在一个JComboBox下选的框的时候。每个值的前面加一个JCheckBox。选的时候可以打上勾。实现多选。

Answer 1

多选怎么会是你这样说的实现？要么是在JList中添加JCheckBox，或者直接在JPanel中添加JCheckBox，JComboBox只能选择一个

Answer 2

JCheckBox打上勾，得到复选框里选中的

Answer 3

你说的应该是列表吧
VC也没有这样的控件啊
JList

Answer 4

贴你个例子
/**
   @version 1.02 2004-08-24
   @author Cay Horstmann
*/import java.awt.*;
import java.awt.event.*;
import java.awt.geom.*;
import java.util.*;
import javax.swing.*;/**
   This program displays the effects of various transformations.
*/
public class TransformTest
{  
   public static void main(String[] args)
   {  
      JFrame frame = new TransformTestFrame();
      frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      frame.setVisible(true);
   }
}/**
   This frame contains radio buttons to choose a transformations
   and a panel to display the effect of the chosen 
   transformation.
*/
class TransformTestFrame extends JFrame
{  
   public TransformTestFrame()
   {  
      setTitle("TransformTest");
      setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);      canvas = new TransformPanel();
      add(canvas, BorderLayout.CENTER);      JPanel buttonPanel = new JPanel();
      ButtonGroup group = new ButtonGroup();      JRadioButton rotateButton = new JRadioButton("Rotate", true);
      buttonPanel.add(rotateButton);
      group.add(rotateButton);
      rotateButton.addActionListener(new
         ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               canvas.setRotate();
            }
         });      JRadioButton translateButton = new JRadioButton("Translate", false);
      buttonPanel.add(translateButton);
      group.add(translateButton);
      translateButton.addActionListener(new
         ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               canvas.setTranslate();
            }
         });      JRadioButton scaleButton = new JRadioButton("Scale", false);
      buttonPanel.add(scaleButton);
      group.add(scaleButton);
      scaleButton.addActionListener(new
         ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               canvas.setScale();
            }
         });      JRadioButton shearButton = new JRadioButton("Shear", false);
      buttonPanel.add(shearButton);
      group.add(shearButton);
      shearButton.addActionListener(new
         ActionListener()
         {
            public void actionPerformed(ActionEvent event)
            {
               canvas.setShear();
            }
         });      add(buttonPanel, BorderLayout.NORTH);
   }   private TransformPanel canvas;
   private static final int DEFAULT_WIDTH = 300;
   private static final int DEFAULT_HEIGHT = 300;
}/**
   This panel displays a square and its transformed image
   under a transformation.
*/
class TransformPanel extends JPanel
{  
   public TransformPanel()
   {  
      square = new Rectangle2D.Double(-50, -50, 100, 100);
      t = new AffineTransform();
      setRotate();
   }   public void paintComponent(Graphics g)
   {  
      super.paintComponent(g);
      Graphics2D g2 = (Graphics2D) g;
      g2.translate(getWidth() / 2, getHeight() / 2);
      g2.setPaint(Color.gray);
      g2.draw(square);
      g2.transform(t);
      // we don't use setTransform because we want to compose with the current translation
      g2.setPaint(Color.black);
      g2.draw(square);
   }   /**
      Set the transformation to a rotation.
   */
   public void setRotate()
   {  
      t.setToRotation(Math.toRadians(30));
      repaint();
   }   /**
      Set the transformation to a translation.
   */
   public void setTranslate()
   {  
      t.setToTranslation(20, 15);
      repaint();
   }   /**
      Set the transformation to a scale transformation.
   */
   public void setScale()
   {  
      t.setToScale(2.0, 1.5);
      repaint();
   }   /**
      Set the transformation to a shear transformation.
   */
   public void setShear()
   {  
      t.setToShear(-0.2, 0);
      repaint();
   }   private Rectangle2D square;
   private AffineTransform t;
}

Answer 5

楼上误解了。diggywang(Miner Lover！) 老兄怎么联系啊

Answer 6

Sprite_bei() 把代码帖出来看看。我现在。能画出样子来。但实现复选触发方面有点问题

Answer 7

使用Renderer
我的思路也是这样的。样子出来了。实现覆盖原来JCombox监视听的时候有点问题

Answer 8

呵呵，我还是想象不出来用JComboBox来实现多选...

Answer 9

关注下,最近也在找这个东西
还是有用的,最常用的就是用在生成SQL条件中的IN (,,,,)部分
Jlist虽然可以加上CheckBox,但是太占空间

Answer 10

搜索Tame Swing, 小鬼子N久之前就作出来了.