Adicionar imagem a jComboBox

package tela;

/* 
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 
 *   - Redistributions of source code must retain the above copyright 
 *     notice, this list of conditions and the following disclaimer. 
 * 
 *   - Redistributions in binary form must reproduce the above copyright 
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution. 
 * 
 *   - Neither the name of Oracle or the names of its 
 *     contributors may be used to endorse or promote products derived 
 *     from this software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */   
   
 import java.awt.*;  
 import java.awt.event.*;  
 import javax.swing.*;  
   
 /* 
 * CustomComboBoxDemo.java uses the following files: 
 *   images/Bird.gif 
 *   images/Cat.gif 
 *   images/Dog.gif 
 *   images/Rabbit.gif 
 *   images/Pig.gif 
 */  
 public class CustomComboBoxDemo extends JPanel {  
     ImageIcon[] images ;  
     String[] alarms = {"Bird", "Cat", "Dog", "Rabbit", "Pig"};  
     JComboBox petList;  
     ListCellRenderer aaa;  
     /* 
      * Despite its use of EmptyBorder, this panel makes a fine content 
      * pane because the empty border just increases the panel's size 
      * and is "painted" on top of the panel's normal background.  In 
      * other words, the JPanel fills its entire background if it's 
      * opaque (which it is by default); adding a border doesn't change 
      * that. 
      */  
     public CustomComboBoxDemo() {  
         super(new BorderLayout());  
         this.setSize(new Dimension(300,300));  
         //Load the pet images and create an array of indexes.  
         images = new ImageIcon[alarms.length];  
         /*Integer[] intArray = new Integer[alarms.length]; 
         for (int i = 0; i < alarms.length; i++) { 
             intArray[i] = new Integer(i); 
             images[i] = new ImageIcon("images/"+alarms[i]+".gif"); 
             if (images[i] != null) { 
                 images[i].setDescription(alarms[i]); 
             } 
         }*/  
   
         //Create the combo box.  
         petList = new JComboBox(/*intArray*/);  
         //petList.setVisible(false);  
         aaa = petList.getRenderer();  
         /*ComboBoxRenderer renderer= new ComboBoxRenderer(images,alarms); 
         renderer.setPreferredSize(new Dimension(200, 130)); 
         petList.setRenderer(renderer);*/  
         petList.setMaximumRowCount(3);  
   
         //Lay out the demo.*/  
         add(petList, BorderLayout.PAGE_START);  
         JButton sdf =new JButton("SSS");  
         OptionsNavigationListener opt_action = new OptionsNavigationListener();  
         sdf.addActionListener(opt_action);  
         add(sdf);  
         //setBorder(BorderFactory.createEmptyBorder(20,20,20,20));  
         //System.out.println(petList.getItemAt(1));  
     }  
   
     class OptionsNavigationListener implements ActionListener {  
   
         public void actionPerformed(ActionEvent e) {  
             //System.out.println("sdf");  
             //  
             petList.setVisible(true);  
             petList.setRenderer(aaa);  
             petList.removeAllItems();  
             images = new ImageIcon[alarms.length];  
             Integer[] intArray = new Integer[alarms.length];  
             for (int i = 0; i < alarms.length; i++) {  
                 intArray[i] = new Integer(i);  
                 images[i] = new ImageIcon("images/"+alarms[i]+".gif");  
                 if (images[i] != null) {  
                     images[i].setDescription(alarms[i]);  
                 }  
                 petList.insertItemAt(intArray[i], petList.getItemCount());  
                   
             }  
             ComboBoxRenderer renderer2= new ComboBoxRenderer(images,alarms);  
             //renderer.setPreferredSize(new Dimension(200, 130));  
             if (renderer2 != null){  
                 System.out.println("mer......"+renderer2);  
                 renderer2.setPreferredSize(new Dimension(200, 130));  
             }  
             petList.setRenderer(renderer2);  
         }  
           
     }  
   
     /** 
      * Create the GUI and show it.  For thread safety, 
      * this method should be invoked from the 
      * event-dispatching thread. 
      */  
     private static void createAndShowGUI() {  
         //Create and set up the window.  
         JFrame frame = new JFrame("CustomComboBoxDemo");  
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
   
         //Create and set up the content pane.  
         JComponent newContentPane = new CustomComboBoxDemo();  
         newContentPane.setOpaque(true); //content panes must be opaque  
         frame.setContentPane(newContentPane);  
   
         //Display the window.  
         frame.pack();  
         frame.setVisible(true);  
     }  
   
     public static void main(String[] args) {  
         //Schedule a job for the event-dispatching thread:  
         //creating and showing this application's GUI.  
         javax.swing.SwingUtilities.invokeLater(new Runnable() {  
             public void run() {  
                 createAndShowGUI();  
             }  
         });  
     }  
   
     class ComboBoxRenderer extends JLabel  
                            implements ListCellRenderer {  
   
 private ImageIcon[] images;  
 private String[] alarms;  
   
         public ComboBoxRenderer(ImageIcon[] images, String[] alarms) {  
             setOpaque(true);  
             setHorizontalAlignment(CENTER);  
             setVerticalAlignment(CENTER);  
             this.alarms = alarms;  
             this.images = images;  
         }  
   
         /* 
          * This method finds the image and text corresponding 
          * to the selected value and returns the label, set up 
          * to display the text and image. 
          */  
         public Component getListCellRendererComponent(  
                                            JList list,  
                                            Object value,  
                                            int index,  
                                            boolean isSelected,  
                                            boolean cellHasFocus) {  
             //Get the selected index. (The index param isn't  
             //always valid, so just use the value.)  
              
                 int selectedIndex = ((Integer)value).intValue();  
   
                 if (isSelected) {  
                     setBackground(list.getSelectionBackground());  
                     setForeground(list.getSelectionForeground());  
                 } else {  
                     setBackground(list.getBackground());  
                     setForeground(list.getForeground());  
                 }  
   
                 //Set the icon and text.  If icon was null, say so.  
                 ImageIcon icon = images[selectedIndex];  
                 String pet = alarms[selectedIndex];  
                 setIcon(icon);  
                 if (icon != null) {  
                     setText(pet);  
                     setFont(list.getFont());  
                 } else{  
                     System.out.println("sdf " + selectedIndex);  
                 }  
               
             return this;  
         }  
   
         //Set the font and text when no image was found.  
   
     }  
 }

package tela;

/* 
 * Copyright (c) 1995, 2008, Oracle and/or its affiliates. All rights reserved. 
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions 
 * are met: 
 * 
 *   - Redistributions of source code must retain the above copyright 
 *     notice, this list of conditions and the following disclaimer. 
 * 
 *   - Redistributions in binary form must reproduce the above copyright 
 *     notice, this list of conditions and the following disclaimer in the 
 *     documentation and/or other materials provided with the distribution. 
 * 
 *   - Neither the name of Oracle or the names of its 
 *     contributors may be used to endorse or promote products derived 
 *     from this software without specific prior written permission. 
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS 
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
 */   
   
 import java.awt.*;  
 import java.awt.event.*;  
 import javax.swing.*;  
   
 /* 
 * CustomComboBoxDemo.java uses the following files: 
 *   images/Bird.gif 
 *   images/Cat.gif 
 *   images/Dog.gif 
 *   images/Rabbit.gif 
 *   images/Pig.gif 
 */  
 public class CustomComboBoxDemo extends JPanel {  
     ImageIcon[] images ;  
     String[] alarms = {"Bird", "Cat", "Dog", "Rabbit", "Pig"};  
     JComboBox petList;  
     ListCellRenderer aaa;  
     /* 
      * Despite its use of EmptyBorder, this panel makes a fine content 
      * pane because the empty border just increases the panel's size 
      * and is "painted" on top of the panel's normal background.  In 
      * other words, the JPanel fills its entire background if it's 
      * opaque (which it is by default); adding a border doesn't change 
      * that. 
      */  
     public CustomComboBoxDemo() {  
         super(new BorderLayout());  
         this.setSize(new Dimension(300,300));  
         //Load the pet images and create an array of indexes.  
         images = new ImageIcon[alarms.length];  
         /*Integer[] intArray = new Integer[alarms.length]; 
         for (int i = 0; i < alarms.length; i++) { 
             intArray[i] = new Integer(i); 
             images[i] = new ImageIcon("images/"+alarms[i]+".gif"); 
             if (images[i] != null) { 
                 images[i].setDescription(alarms[i]); 
             } 
         }*/  
   
         //Create the combo box.  
         petList = new JComboBox(/*intArray*/);  
         //petList.setVisible(false);  
         aaa = petList.getRenderer();  
         /*ComboBoxRenderer renderer= new ComboBoxRenderer(images,alarms); 
         renderer.setPreferredSize(new Dimension(200, 130)); 
         petList.setRenderer(renderer);*/  
         petList.setMaximumRowCount(3);  
   
         //Lay out the demo.*/  
         add(petList, BorderLayout.PAGE_START);  
         JButton sdf =new JButton("SSS");  
         OptionsNavigationListener opt_action = new OptionsNavigationListener();  
         sdf.addActionListener(opt_action);  
         add(sdf);  
         //setBorder(BorderFactory.createEmptyBorder(20,20,20,20));  
         //System.out.println(petList.getItemAt(1));  
     }  
   
     class OptionsNavigationListener implements ActionListener {  
   
         public void actionPerformed(ActionEvent e) {  
             //System.out.println("sdf");  
             //  
             petList.setVisible(true);  
             petList.setRenderer(aaa);  
             petList.removeAllItems();  
             images = new ImageIcon[alarms.length];  
             Integer[] intArray = new Integer[alarms.length];  
             for (int i = 0; i < alarms.length; i++) {  
                 intArray[i] = new Integer(i);  
                 images[i] = new ImageIcon("images/"+alarms[i]+".gif");  
                 if (images[i] != null) {  
                     images[i].setDescription(alarms[i]);  
                 }  
                 petList.insertItemAt(intArray[i], petList.getItemCount());  
                   
             }  
             ComboBoxRenderer renderer2= new ComboBoxRenderer(images,alarms);  
             //renderer.setPreferredSize(new Dimension(200, 130));  
             if (renderer2 != null){  
                 System.out.println("mer......"+renderer2);  
                 renderer2.setPreferredSize(new Dimension(200, 130));  
             }  
             petList.setRenderer(renderer2);  
         }  
           
     }  
   
     /** 
      * Create the GUI and show it.  For thread safety, 
      * this method should be invoked from the 
      * event-dispatching thread. 
      */  
     private static void createAndShowGUI() {  
         //Create and set up the window.  
         JFrame frame = new JFrame("CustomComboBoxDemo");  
         frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);  
   
         //Create and set up the content pane.  
         JComponent newContentPane = new CustomComboBoxDemo();  
         newContentPane.setOpaque(true); //content panes must be opaque  
         frame.setContentPane(newContentPane);  
   
         //Display the window.  
         frame.pack();  
         frame.setVisible(true);  
     }  
   
     public static void main(String[] args) {  
         //Schedule a job for the event-dispatching thread:  
         //creating and showing this application's GUI.  
         javax.swing.SwingUtilities.invokeLater(new Runnable() {  
             public void run() {  
                 createAndShowGUI();  
             }  
         });  
     }  
   
     class ComboBoxRenderer extends JLabel  
                            implements ListCellRenderer {  
   
 private ImageIcon[] images;  
 private String[] alarms;  
   
         public ComboBoxRenderer(ImageIcon[] images, String[] alarms) {  
             setOpaque(true);  
             setHorizontalAlignment(CENTER);  
             setVerticalAlignment(CENTER);  
             this.alarms = alarms;  
             this.images = images;  
         }  
   
         /* 
          * This method finds the image and text corresponding 
          * to the selected value and returns the label, set up 
          * to display the text and image. 
          */  
         public Component getListCellRendererComponent(  
                                            JList list,  
                                            Object value,  
                                            int index,  
                                            boolean isSelected,  
                                            boolean cellHasFocus) {  
             //Get the selected index. (The index param isn't  
             //always valid, so just use the value.)  
              
                 int selectedIndex = ((Integer)value).intValue();  
   
                 if (isSelected) {  
                     setBackground(list.getSelectionBackground());  
                     setForeground(list.getSelectionForeground());  
                 } else {  
                     setBackground(list.getBackground());  
                     setForeground(list.getForeground());  
                 }  
   
                 //Set the icon and text.  If icon was null, say so.  
                 ImageIcon icon = images[selectedIndex];  
                 String pet = alarms[selectedIndex];  
                 setIcon(icon);  
                 if (icon != null) {  
                     setText(pet);  
                     setFont(list.getFont());  
                 } else{  
                     System.out.println("sdf " + selectedIndex);  
                 }  
               
             return this;  
         }  
   
         //Set the font and text when no image was found.  
   
     }  
 }