ImageIcon vs MediaTracker

I need some advice from the experts out there
which is a better way to get images from a file on the hard drive into an image object?
Image m = new ImageIcon("Blah.gif");
or
using a mediatracker and default toolkit and all that
i've had problems with low end machines (pentium 133, 32 megs of ram) failing to load images when using the the media tracker method. (works fine on decent machines)
would switching to the imageIcon method work better?
thanks

I think you can use the toolkit to load images, but I think it all comes down to the same thing. MediaTracker is probably pretty close to your best bet.

Similar Messages

How can I prevent the MediaTracker waitForID method from blocking?

Hi everyone:
I am writing an application that deals with various image file formats with the help of the JIMI package (available at http://java.sun.com/products/jimi/). Everything works fine except for the Targa format. When I generate an Image object as follows (url is a valid URL object):
Image image = Jimi.getImage(url);
ImageIcon icon = new ImageIcon(image);the program execution blocks at the second line above. I searched the ImageIcon source code for some clues, which led me to the following ImageIcon method (tracker is a MediaTracker object, a static property of ImageIcon):
(01) protected void loadImage(Image image) {
(02)   synchronized(tracker) {
(03)     tracker.addImage(image, 0);
(04)     try {
(05)       tracker.waitForID(0, 0);
(06)     } catch (InterruptedException e) {
(07)       System.out.println("INTERRUPTED while loading Image");
(08)     }
(09)     loadStatus = tracker.statusID(0, false);
(10)     tracker.removeImage(image, 0);
(11)
(12)     width = image.getWidth(imageObserver);
(13)     height = image.getHeight(imageObserver);
(14)   }
(15) }The program blocks at line (05) above. I peeked into the MediaTracker class source code, which brought me to determine that the image loading process never finishes. The symptoms are as follows:
(1) When I perform a c.checkImage(image, null) where c is some Component, I always get a result of 7, which translates to the following combination of ImageObserver constants:
WIDTH | HEIGHT | PROPERTIESAs matter of fact, the dimensions are indeed determined correctly. However, when the loading process terminates, the checkImage result includes ALLBITS or FRAMEBITS in case of success, ABORT or ERROR in case of failure. None of these bits is ever turned on whenever I try to load a Targa image.
(2) When I get to the MediaTracker source code, I see that when none of the four bytes above is set, the internal MediaTracker status has the MediaTracker.LOADING bit turned on (nothing abnormal here). And the waitForID method terminates precisely only when this bit is turned off!
Logically, if the loading process fails for some reason, I should expect to get an error response so that I can go further in code execution. However, since the loading process never terminates, everything stays blocked at the waitForID method invocation.
Is there an efficient way to detect such a hidden loading error without letting my program go into the waitForID endless loop? In other words, going back to the first two lines of code of this message, how could I detect that an Image loading process will not terminate before calling the ImageIcon constructor?
Thanks in advance for any useful help...
Jean-Fran�ois Morin

Hi:
I tried precisely your suggestion before posting my message to the forum yesterday. I just forgot to mention it... Maybe I was afraid of increasing my message length more and more...
I already know that this solution prevents the MediaTracker from blocking. However...
(1) If they reach a troublesome image (like a Targa), the users of my application might not be pleased by its freezing for 10 seconds. Actually, this image loading module is part of an architecture for database applications from which my development team and I produce applications for various customers. Images are used, in particular, in Oracle BLOB support.
(2) If I use a smaller timeout delay, I have no guarantee that any image, whatever its length, will load properly (Targa excluded, of course). According to tests I performed yesterday, I am virtually sure that the 10-second delay will be busted very easily by pictures larger than 1 Mb. I cannot overlook this potential problem: an Oracle BLOB can contain up to 2 terabytes of data!
On the other side, I don't want to focus too much the attention on the JIMI Targa import filter because I know that a revised version of the JIMI and JAI packages will be part of JDK 1.4. This is why I am trying to figure out what is happening in the MediaTracker and Toolkit classes, which are much more fundamental than the Jimi ones...
Thanks anyway...
Best regards,
Jean-Fran�ois Morin

Reuse ImageIcon across multiple applets

I have 5 applets and a gif image that all reside in the same JAR file. I have a common class that loads up the gif and then paints it onto a JPanel in each of the applets. When I run the different applets, using Java Plug-in 1.3.1 (IE 5.0), the image displays fine in the first applet i run, but all subsequent applets fail to load it. I'm loading it each time the applet launches using the following method:
animatedGif = new ImageIcon(
Toolkit.getDefaultToolkit().getImage(getClass().getResource(imageFileName)));
Anyone have any idea why it only displays in the first applet launched? Thanks.

I tried cloning the image, but did not solve the problem. I added code to check the load status of the image, and found that MediaTracker is reporting an ERRORED load status on the second, and subsequent loads. Is there any way to get more specific info on the reason MediaTracker errored? It's not throwing any exceptions.
animatedGif = new ImageIcon(
          Toolkit.getDefaultToolkit().getImage(getClass().getResource(imageFileName)), "Loading image");
System.out.println("******** animated GIF=" + animatedGif);
int err = animatedGif.getImageLoadStatus();
if (err == MediaTracker.ERRORED) {
     System.out.println("******MediaTracker ERROR");
} else if (err == MediaTracker.COMPLETE) {
     System.out.println("******MediaTracker COMPLETE");
     }

ImageIcon : How can I find out if image is loaded correctly?

How can I find out if image is loaded coretly? (see example)
private Image img;
img = new ImageIcon("C:\image.jpg").getImage();
If path is wrong, there is no exception or null in img.
Thanks....
Message was edited by:
ptibull77

also from the ImageIcon docs (note the ERRORED and ABORTED):
http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/ImageIcon.html#loadImage(java.awt.Image)
getImageLoadStatus
public int getImageLoadStatus()Returns the status of the image loading operation.
Returns:
the loading status as defined by java.awt.MediaTracker
See Also:
MediaTracker.ABORTED, MediaTracker.ERRORED, MediaTracker.COMPLETE

Need Help urgently (ImageIcon is not displayed on JButton)

Hello,
In my source code there is an action listener, bound to an array of JButtons.
So when a button is pressed, it should display an image. (I get the pressed button from the ActionEvent e with e.getActionCommand()), so i can decide which button was pressed.
The first image is displayed correctly, but if i press the second button, it parses the line (checked with debugger) but the image won't be displayed.
The ImageIcon is loaded correctly, it just doesn't display on the second button.
Thank you for help,
WildChild

static ActionListener al = new ActionListener() {    // Spiellogik nachdem eine Karte ausgewaehlt wurde
          public void actionPerformed( ActionEvent e ) {
               vHandleEvent(e);
     public static void vHandleEvent(ActionEvent e) {
          if (iAnzahlGewaehlt == 0) {
               vErsteKarte(e);
               iAnzahlGewaehlt++;
          else {
               vZweitearte(e);
               iAnzahlGewaehlt=0;
          public static void vErsteKarte(ActionEvent ect) {
                    strSelektor[0] = ect.getActionCommand().toString();
                    for (int i=0; i<48;i++) {
                         if (arrayKartendarsteller.getText().equalsIgnoreCase(strSelektor[0])) {
                              arrayKartendarsteller[i].setIcon(new ImageIcon(arrayKartendarsteller[i].getText().substring(0, arrayKartendarsteller[i].getText().lastIndexOf("jpg")+3)));
                         iMerken = i;
          public static void vZweitearte(ActionEvent ect2) {
               strSelektor[1] = ect2.getActionCommand().toString();
               for (int i=0; i<48;i++) {
                    if (arrayKartendarsteller[i].getText().equalsIgnoreCase(strSelektor[1])) {
                         ImageIcon img = new ImageIcon(arrayKartendarsteller[i].getText().substring(0, arrayKartendarsteller[i].getText().lastIndexOf("jpg")+3));
                         if (img.getImageLoadStatus() == MediaTracker.COMPLETE) System.out.println("Perfekt geladen!");
                         arrayKartendarsteller[i].setIcon(img);
                         iMerken2 = i;
                         System.out.println(arrayKartendarsteller[i].getText().substring(0, arrayKartendarsteller[i].getText().lastIndexOf("jpg")+3));
               if (strSelektor[0].substring(0, strSelektor[0].lastIndexOf("jpg")+3).equalsIgnoreCase(strSelektor[1].substring(0, strSelektor[1].lastIndexOf("jpg")+3))) {
                    //System.out.println("gemerkt:"+ iMerken+""+iMerken2);
                    if (iMerken != iMerken2){ // Pruefen, ob nicht 2x dasselbe gewaehlt wurde
                    System.out.println("Bravo, 2 Gleiche gefunden!");
                    arrayKartendarsteller[iMerken].setIcon(new ImageIcon("Bilder/haken.jpg"));
                    arrayKartendarsteller[iMerken2].setIcon(new ImageIcon("Bilder/haken.jpg"));
               else {
                    arrayKartendarsteller[iMerken].setIcon(new ImageIcon("Bilder/verdeckt.jpg"));
                    arrayKartendarsteller[iMerken2].setIcon(new ImageIcon("Bilder/verdeckt.jpg"));

XMLEncoder and ImageIcon

I have an ImageIcon that I would like to convert to XML using XMLEncoder. I've successfully converted other types of objects, but when I try this one, I don't get the image data - just the description field. I really only care about the image data - I don't want to have to separately handle the file the image is created from if possible.
My code is below. I'm assuming that this just isn't going to work, so any alternatives are greatly appreciated. I'm not married to the ImageIcon, I can use an Image or whatever other class. My only requirements are that it be displayable in a JLabel, storable in a database, and can be sent over a network connection. Big, big plusses for being able to XMLEncode another object that contains the image. Super big plusses.
Any ideas?
Many thanks,
Scott
        XMLEncoder xenc = new XMLEncoder(System.out);
        ImageIcon img = new ImageIcon("/Users/scott/Desktop/icons/contentIcon.gif");
        while (img.getImageLoadStatus() != MediaTracker.COMPLETE) {
            try {
                Thread.sleep(500);
            } catch (InterruptedException e) {
                e.printStackTrace();
        xenc.writeObject(img);

I wouldn't recommend reading the image file with ImageIO and then writing it back out. And I certainly wouldn't use ByteArrayOutputStream.toString(), since it's not really character data.
You have the file object "file", so read that in first.
File file = new File(...);
byte[] imageData = new byte[(int)file.length()];
DataInputStream in = new DataInputStream(new FileInputStream(file));
in.readFully(imageData);
in.close();Then you can show that on screen simply enough...
JLabel label = new JLabel(new ImageIcon(imageData));Then to save that byte array as a string, you need to encode the bytes. Base-64 encoding is probably the best way. But it should be said that it's not recommened to use the Sun Base-64 encoder, cuz it might not be on all JVM implementations. There are 3rd-party ones you can find and substitute for it, but...
// to string...
String imageDataString = new sun.misc.BASE64Encoder().encode(imageData);
// save to the XML node
// back to bytes...
byte[] imageData = new sun.misc.BASE64Decoder().decodeBuffer(imageDataString);
// show in a label, like above

Resized animated gif ImageIcon not working properly with JButton etc.

The problem is that when I resize an ImageIcon representing an animated gif and place it on a Jbutton, JToggelButton or JLabel, in some cases the image does not show or does not animate. More precicely, depending on the specific image file, the image shows always, most of the time or sometimes. Images which are susceptible to not showing often do not animate when showing. Moving over or clicking with the mouse on the AbstractButton instance while the frame is supposed to updated causes the image to disappear (even when viewing the non-animating image that sometimes appears). No errors are thrown.
Here some example code: (compiled with Java 6.0 compliance)
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test
     public static void main(String[] args)
          new Test();
     static final int IMAGES        = 3;
     JButton[]           buttons       = new JButton[IMAGES];
     JButton             toggleButton = new JButton("Toggle scaling");
     boolean            doScale       = true;
     public Test()
          JFrame f = new JFrame();
          f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          JPanel p = new JPanel(new GridLayout(1, IMAGES));
          for (int i = 0; i < IMAGES; i++)
               p.add(this.buttons[i] = new JButton());
          f.add(p, BorderLayout.CENTER);
          f.add(this.toggleButton, BorderLayout.SOUTH);
          this.toggleButton.addActionListener(new ActionListener() {
               @Override
               public void actionPerformed(ActionEvent e)
                    Test.this.refresh();
          f.setSize(600, 300);
          f.setVisible(true);
          this.refresh();
     public void refresh()
          this.doScale = !this.doScale;
          for (int i = 0; i < IMAGES; i++)
               ImageIcon image = new ImageIcon(i + ".gif");
               if (this.doScale)
                    image = new ImageIcon(image.getImage().getScaledInstance(180, 180, Image.SCALE_AREA_AVERAGING));
               image.setImageObserver(this.buttons);
               this.buttons[i].setIcon(image);
               this.buttons[i].setSelectedIcon(image);
               this.buttons[i].setDisabledIcon(image);
               this.buttons[i].setDisabledSelectedIcon(image);
               this.buttons[i].setRolloverIcon(image);
               this.buttons[i].setRolloverSelectedIcon(image);
               this.buttons[i].setPressedIcon(image);
Download the gif images here:
http://djmadz.com/zombie/0.gif
http://djmadz.com/zombie/1.gif
http://djmadz.com/zombie/2.gif
When you press the "Toggle scaling"button it switches between unresized (properly working) and resized instances of three of my gif images. Notice that the left image almost never appears, the middle image always, and the right image most of the time. The right image seems to (almost) never animate. When you click on the left image (when visble) it disappears only when the backend is updating the animation (between those two frames with a long delay)
Why are the original ImageIcon and the resized ImageIcon behaving differently? Are they differently organized internally?
Is there any chance my way of resizing might be wrong?

It does work, however I refuse to use SCALE_REPLICATE for my application because resizing images is butt ugly, whether scaling up or down. Could there be a clue in the rescaling implementations, which I can override?
Maybe is there a way that I can check if an image is a multi-frame animation and set the scaling algorithm accordingly?
Message was edited by:
Zom-B

Can not display ImageIcon in a JLabel where you want in the code ???

Hello, everybody. I need your help to solve a problem I am on it for 2 days now :
In the constructor of my class, I have a lot of initializing methods. If I try to display an image (with ImageIcon in a JLabel) within one of these methods, there is no problem and the image is correctely displayed. To try that, I use an image stored on my local disk in "c:\\".
public class Bedes extends javax.swing.JFrame {
public Bedes() {
initComponents();
-- further initializations
initConnection();
public void initConnection() {
try {
String driverName = "sun.jdbc.odbc.JdbcOdbcDriver";
Properties systemProperties = System.getProperties();
systemProperties.put("jdbc.drivers", driverName);
System.setProperties(systemProperties);
String dbURL = "jdbc:odbc:Bandes Dessin�es";
String strUtilisateur = "bedes";
String strMotDePasse = "cdle";
connectBedes = DriverManager.getConnection(dbURL,strUtilisateur,strMotDePasse);
catch (Exception e) {
System.out.println("Exception in DB Contact " + e);
// Here, I display an image in my JLabel, and it works :
couvertureAlbumString = "c:\\myImage.jpg";
couvertureAlbumsIcon = new ImageIcon(couvertureAlbumString);
couvertureAlbumsJLabel.setIcon(couvertureAlbumsIcon);
couvertureAlbumsJLabel.repaint();
}The problem is that I do not want to display these images there, but in a method that read some data's in a Database (with "try"-"catch" blocks). If there is a name of an image store in the DB, then it must be displayed in the JLabel (located in a JFrame -> JDeskTopPane -> JTabbedPane -> JPanel).
private void searchDetailsForAlbum(String albumsDetailsToSearch) {
String nomImageCouverture;
String couvertureAlbumString;
ImageIcon couvertureAlbumsIcon;
try {
PreparedStatement requeteDetailsAlbums = connectBedes.prepareStatement("SELECT * FROM bandes_dess WHERE bede_nom_tome = ?");
requeteDetailsAlbums.setString(1, albumsDetailsToSearch);
ResultSet resultatDetailsAlbums = requeteDetailsAlbums.executeQuery();
resultatDetailsAlbums.next();
collectionAlbumsJTextField.setText(resultatDetailsAlbums.getString(6));
genreAlbumsJTextField.setText(resultatDetailsAlbums.getString(9));
dessinateurAlbumsJTextField.setText(resultatDetailsAlbums.getString(10));
scenaristeAlbumsJTextField.setText(resultatDetailsAlbums.getString(11));
coloristeAlbumsJTextField.setText(resultatDetailsAlbums.getString(12));
prixAchatAlbumsJTextField.setText(resultatDetailsAlbums.getString(13));
// Here is the name of the Image to de read
nomImageCouverture = resultatDetailsAlbums.getString(14);
catch (Exception e) {
System.out.println("Exception in searchDetailsForAlbum" + e);
couvertureAlbumString = "c:\\";
// Here, I check if there is a name for a picture in the DB
if (!(nomImageCouverture.equals("No"))) {
// If Yes, I want to display it
couvertureAlbumString = couvertureAlbumString + nomImageCouverture;
couvertureAlbumsIcon = new ImageIcon(couvertureAlbumString);
couvertureAlbumsJLabel.setIcon(couvertureAlbumsIcon);
couvertureAlbumsJLabel.repaint();
}My JLabel is well displayed, but empty, without any image on it. WHY ???
MLK, you asked me to add some debug code. OK, with pleasure, but what is that "debug code" ???
Thanks a lot in advance if you could help me.
Christian.

DEBUG: couvertureAlbumString: c:\Aldebaran-La-Photo
OK, the extension of the file was NOT present !!!
I added it and ..... it works pretty good !!!
Thank you for your idea of the DEBUG.
Christian.

Using ImageIcon load an image

Hi I'm having a lot of trouble getting the below code to work. Its copied out of my textbook and its supposed to load an image using the getImage method in the ImageIcon class. The strange thing is I have gotten this to work before, but after I installed Windows 2000 the image doesn't seem to load right anymore.
getWidth and getHeight - on the image afterwards returns -1.
Could this be windows 2000's problem? I'm pretty sure it isn't .. but when you run out of ideas, it feels good to put the blame on something other than yourself.
import java.awt.*;
import javax.swing.*;
import java.net.*;
public class DisplayImage extends JApplet
public void init()
ImageIcon icon = null;
try
icon = new ImageIcon(new URL(getCodeBase(), "Images/backTile.bmp"));
catch(MalformedURLException e)
System.out.println("Failed to create URL:\n"+e);
return;
int imageWidth = icon.getIconWidth();
int imageHeight = icon.getIconHeight();
resize(imageWidth, imageHeight);
ImagePanel imagePanel = new ImagePanel(icon.getImage());
getContentPane().add(imagePanel);
class ImagePanel extends JPanel
public ImagePanel(Image image)
this.image = image;
public void paint(Graphics g)
g.drawImage(image,0,0,this);
Image image;
Again thx a lot. I know its a lot of code to read. Any help at all would be much appreciated.

".bmp" ? Windows bitmap isn't a supported file type, you should save your image as .gif, .png, or as .jpg.

Problem with JFileChooser and ImageIcon

I'm trying to create an ImageIcon object from file selected in JFileChooser. The problem is that jfc.getSelectedFile().getAbsolutePath() returns a string with backslashes and the constructor of ImageIcon requires the string to have slashes. I`ve tried to create it via URL but it doesn't work as well...
String lastUsedPath;
URL imageURL;
JFileChooser fc = new JFileChooser();
JFrame frame = new JFrame();
frame.setDefaultCloseOperation(JFrame.DISPOSE_ON_CLOSE);
int returnVal = fc.showDialog(frame,title);
if(returnVal==JFileChooser.APPROVE_OPTION){
     lastUsedPath = fc.getSelectedFile().getAbsolutePath();
     imageURL = getClass().getResource(lastUsedPath);     //don't really get this but I copied it from Java Swing Tutorial
}else{
     return null;
int curH, curW;
ImageIcon srcIcon = new ImageIcon(imageURL);
curW = srcIcon.getIconWidth();
curH = srcIcon.getIconHeight();If I use it this way imageURL is set to null.
If I set the imageURL as 'fc.getSelectedFile().toURL()' the string is eg.: "file:/E:/file.jpg" instead of "E:/file.jpg". After that the ImageIcon is created but width and height return -1.
If I try to create ImageIcon by 'new ImageIcon(lastUsedPath)' I get a not null object but the width & height of the ImageIcon is -1 as well.
What do I have to do to be able to create an ImageIcon from file selected in JFileChooser? Why is this so hard and mind blowing?

It still returns the ImageIcon object with width & height set to -1.
EDIT:
Got it finally:
lastUsedPathForStupidImageIcon = fc.getSelectedFile().getPath();
img = ImageIO.read(new File(lastUsedPathForStupidImageIcon));
curH = img.getHeight(this);
curW = img.getWidth(this);The key was to use another String variable and hold the path instead of the absolute path
Edited by: Beholder on Jan 17, 2010 1:35 PM

Bug: IconUIResource doesn't paint an animated ImageIcon

I was recently playing with Icons and found that javax.swing.plaf.IconUIResource doesn't paint an ImageIcon that contains an animated GIF. Found the reason in these bug fixes.
[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4215118]
[http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=4215118]
From that, I could arrive at a workaround: extend ImageIcon to implement the UIResource marker interface and use this class instead of wrapping an ImageIcon in a IconUIResource. Interestingly, NetBeans autocomplete revealed the existance of sun.swing.ImageIconUIResource which I determined to be a direct subclass of ImageIcon, with two constructors that take an Image and byte[] respectively.
Test SSCCE: import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.MalformedURLException;
import java.net.URL;
import javax.swing.Icon;
import javax.swing.ImageIcon;
import javax.swing.JOptionPane;
import javax.swing.UIManager;
import javax.swing.plaf.IconUIResource;
import javax.swing.plaf.UIResource;
public class IconUIResourceBug {
public static void main(String[] args) {
    try {
      URL imageURL = new URL("http://www.smiley-faces.org/smiley-faces/smiley-face-rabbit.gif");
      InputStream is = imageURL.openStream();
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      int n;
      byte[] data = new byte[1024];
      while ((n = is.read(data, 0, data.length)) != -1) {
        baos.write(data, 0, n);
      baos.flush();
      byte[] bytes = baos.toByteArray();
      ImageIcon imageIcon = new ImageIcon(bytes);
      Icon icon = new IconUIResource(imageIcon);
      UIManager.put("OptionPane.errorIcon", icon);
      JOptionPane.showMessageDialog(null, "javax.swing.plaf.IconUIResource", "Icon not shown",
              JOptionPane.ERROR_MESSAGE);
      icon = new ImageIconUIResource(bytes);
      UIManager.put("OptionPane.errorIcon", icon);
      JOptionPane.showMessageDialog(null, "ImageIconUIResource", "Icon shown",
              JOptionPane.ERROR_MESSAGE);
      icon = new sun.swing.ImageIconUIResource(bytes);
      UIManager.put("OptionPane.errorIcon", icon);
      JOptionPane.showMessageDialog(null, "sun.swing.ImageIconUIResource", "Icon shown",
              JOptionPane.ERROR_MESSAGE);
    } catch (MalformedURLException ex) {
      ex.printStackTrace();
    } catch (IOException ex) {
      ex.printStackTrace();
class ImageIconUIResource extends ImageIcon implements UIResource {
public ImageIconUIResource(byte[] bytes) {
    super(bytes);
}I can't see any alternative fix for the one carried out in response to the quoted bug reports, so have held off on making a bug report. Any ideas?
Thanks for reading, Darryl
I'm also posting this to JavaRanch for wider discussion, and shall post the link here as soon as possible. I'll also keep both threads updated with all significant suggestions received.
edit [http://www.coderanch.com/t/498351/GUI/java/Bug-IconUIResource-doesn-paint-animated]
Edited by: DarrylBurke

Animated gif is working fine for me.
You can check the delay time between the images in the gif, to see that it's not too short.
Here's a simple example:import java.net.URL;
import javax.imageio.ImageIO;
import javax.imageio.stream.ImageInputStream;
import javax.swing.ImageIcon;
import javax.swing.JDialog;
import javax.swing.JFrame;
import javax.swing.JLabel;
import com.sun.imageio.plugins.gif.GIFImageMetadata;
import com.sun.imageio.plugins.gif.GIFImageReader;
public class AnimatedGifTest {
    public static void main(String[] args) {
        try {
            JFrame frame = new JFrame();
            frame.setDefaultCloseOperation(JDialog.EXIT_ON_CLOSE);
            URL url = new URL("http://www.gifanimations.com/action/SaveImage?path=/Image/Animations/Cartoons/~TS1176984655857/Bart_Simpson_2.gif");
            frame.add(new JLabel(new ImageIcon(url)));
            frame.pack();
            frame.setVisible(true);
            // Read the delay time for the first frame in the animated gif
            GIFImageReader reader = (GIFImageReader) ImageIO.getImageReadersByFormatName("GIF").next();
            ImageInputStream iis = ImageIO.createImageInputStream(url.openStream());
            reader.setInput(iis);
            GIFImageMetadata md = (GIFImageMetadata) reader.getImageMetadata(0);
            System.out.println("Time Delay = " + md.delayTime);
            reader.dispose();
            iis.close();
        } catch (Exception e) {e.printStackTrace();}
}

Help with ImageIcon

Hi,
I'm giving Java another try and I'm working through the short courses and Magercises. I'm having a problem with the code below.
<pre>
package examples.myapps.test;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class FirstSwing extends JFrame {
// The initial width and height of the frame
public static int WIDTH = 300;
public static int HEIGHT = 300;
// images for buttons
public Icon bee = new ImageIcon("bee.gif");
public Icon dog = new ImageIcon("dog.gif");
public FirstSwing(String lab) {
super(lab);
JButton top = new JButton("A bee", bee);
top.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("bee");
JButton bottom = new JButton("and a dog", dog);
bottom.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
System.out.println("dog");
top.setMnemonic (KeyEvent.VK_B);
bottom.setMnemonic (KeyEvent.VK_D);
Container content = getContentPane();
content.setLayout(new GridLayout(2,1));
content.add(top);
content.add(bottom);
public static void main(String args[]) {
FirstSwing frame = new FirstSwing("First Swing Stuff");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
frame.setSize(WIDTH, HEIGHT);
frame.setVisible(true);
</pre>
The problem is that the icons don't appear. The image files (bee.gif and dog.gif) are in the same directory as the source file. I get no errors, the images just do not appear in the button like they are supposed to according to the example. What am I doing wrong?
Thanks,
Mike

I had the same problem with ONE STUDIO 4 trying the example below ... the image is in the same directory as the class is and it�s ok ... it only work fine if I set the full absolute path, but not with a relative one ....
But I tryed the same example in the same dir with Jbuider 3 ... and it works fine and the ImageIcon appears .... I think it�s something related to Filesystems in the Studio One ....
Jo�o Carlos
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class LabelTest extends JFrame {
private JLabel label1, label2, label3;
public LabelTest()
super( "Testing JLabel" );
Container c = getContentPane();
c.setLayout( new GridLayout(3,1) );
// JLabel constructor with a string argument
label1 = new JLabel( "Label with text" );
label1.setToolTipText( "This is label1" );
c.add( label1 );
// JLabel constructor with string, Icon and
// alignment arguments
//Icon bug = new ImageIcon( "C:\\Documents and Settings\\Administrador\\examples\\ch12\\fig12_04\\bug1.GIF" );
Icon bug = new ImageIcon( "bug1.GIF" );
label2 = new JLabel( "Label with text and icon",
bug, SwingConstants.LEFT );
label2.setToolTipText( "This is label2" );
c.add( label2 );
// JLabel constructor no arguments
label3 = new JLabel();
label3.setText( "Label with icon and text at bottom" );
label3.setIcon( bug );
label3.setHorizontalTextPosition(
SwingConstants.CENTER );
label3.setVerticalTextPosition(
SwingConstants.BOTTOM );
label3.setToolTipText( "This is label3" );
c.add( label3 );
setSize( 275, 170 );
show();
public static void main( String args[] )
LabelTest app = new LabelTest();
app.addWindowListener(
new WindowAdapter() {
public void windowClosing( WindowEvent e )
System.exit( 0 );
if your source is in
C:\foo\examples\myapps\test
put the gifs in
C:\fooThanks, but this isn't working either. My source is
in:
c:\java-ide\sampledir\examples\myapps\test.
I've placed the gifs in c:\java-ide,
c:\java-ide\sampledir, c:\java-ide\sampledir\examples,
etc. (all directories) and nothing shows the gifs in
the buttons. Any ideas?

Japplet with imageicon

Hi, im working on a simple paint program in a Japplet. I'm stuck right now on getting an icon on a button by giving the ImageIcon constructor a file path. I get an error when I try to run the applet with the imaging code in, not without.
I've read in a few places that this won't work for general applets or jar files. Is there anyway that i can get it to load from my computer without resorting to having to load the .gif files from a internet site?
// i have this (which doesn't work)
      JButton draw = new JButton(new ImageIcon("images/0.gif"));
      draw.addActionListener(canvas);
      toolsPanel.add(draw);
//as compared to this (which does without an image)
      JButton line = new JButton("Line");
      line.addActionListener(canvas);
      toolsPanel.add(line);

JButton draw = new JButton(new ImageIcon(new java.net.URL(getCodeBase(),"images/0.gif")));

Imageicon in a JComboBox

hi, i do a program to create "business case table", but i've a problem in the 2nd part of the table, because in my 2nd table i have a JComboBox with image, when i click the combobox the images are show, but when select some figure the cell don�t keep the image, only keep the text.
Anyone can help me???
Here is my principal class that create the principal screen and tables:
/*                      Poseidon                                 */
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import javax.swing.border.*;
import javax.swing.table.*;
* Summary description for Poseidon
*2052102
public class Poseidon extends JFrame
     // Variables declaration
     private JTabbedPane jTabbedPane1;
     private JPanel contentPane, paineltabela, painelgrafo, painelvariavel, paineltarefa;
     private JTable tabelavariavel,tabelatarefa, tabelateste;
     private JScrollPane scrollvariavel, scrolltarefa;
     private int totallinhas, alt, al, linhastarefa,cont, linhas, tamanholinhas,
                    controlalinhas, index, contastring;
     private String variavel;
     private JComboBox combobox;
     JMenuItem sair, abrir, guardar, miadtarefa, miadvariavel;
     JTable [] tabelasvar = new JTable[30];
     JFrame w;
     // End of variables declaration
     public Poseidon()
          super("Poseidon");
          initializeComponent();
          this.setVisible(true);
      * This method is called from within the constructor to initialize the form.
      * WARNING: Do NOT modify this code. The content of this method is always regenerated
      * by the Windows Form Designer. Otherwise, retrieving design might not work properly.
      * Tip: If you must revise this method, please backup this GUI file for JFrameBuilder
      * to retrieve your design properly in future, before revising this method.
     private void initializeComponent()
          JMenuBar barra = new JMenuBar();
          setJMenuBar(barra);
          TratBarra trat = new TratBarra();
          tabelavariavel = new JTable();
          tabelatarefa = new JTable();
          tabelavariavel.getTableHeader().setReorderingAllowed(false);
          tabelavariavel.setModel(new DefaultTableModel());
          tabelavariavel.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
          tabelavariavel.setBackground(Color.cyan);
          tabelatarefa.getTableHeader().setReorderingAllowed(false);
          tabelatarefa.setModel(new DefaultTableModel());
          tabelatarefa.setAutoResizeMode(JTable.AUTO_RESIZE_OFF);
          tabelatarefa.setBackground(Color.white);
          CaixaCombinacao combobox = new CaixaCombinacao();
          DefaultCellEditor editor = new DefaultCellEditor(combobox);
          tabelatarefa.setDefaultEditor(Object.class, editor);
          painelvariavel = new JPanel();
          painelvariavel.setLayout(new GridLayout(1, 0));
          painelvariavel.setBorder(new TitledBorder("Variaveis"));
          painelvariavel.setBounds(15, 35, 490, 650);
          painelvariavel.setVisible(false);
          this.add(painelvariavel);
          scrollvariavel = new JScrollPane();
          scrollvariavel.setViewportView(tabelavariavel);
          painelvariavel.add(scrollvariavel);
          paineltarefa = new JPanel();
          paineltarefa.setLayout(new GridLayout(1,0));
          paineltarefa.setBorder(new TitledBorder("Tarefas"));
          paineltarefa.setBounds(506, 35, 490,650);
          paineltarefa.setVisible(false);
          this.add(paineltarefa);
          scrolltarefa = new JScrollPane();
          scrolltarefa.setViewportView(tabelatarefa);
          paineltarefa.add(scrolltarefa);
          tamanholinhas = 1;
          linhas=1;
          cont=0;
          JMenu arquivo = new JMenu("Arquivo");
          JMenu mtabela = new JMenu("Tabela");
          arquivo.setMnemonic(KeyEvent.VK_A);
          mtabela.setMnemonic(KeyEvent.VK_T);
          miadvariavel = new JMenuItem("Adicionar Variavel");
          miadtarefa = new JMenuItem("Adicionar Tarefa");
          abrir = new JMenuItem("Abrir");
          guardar = new JMenuItem("Guardar");
          sair = new JMenuItem("Sair");
          sair.addActionListener(trat);
          miadvariavel.addActionListener(trat);
          miadtarefa.addActionListener(trat);
          mtabela.add(miadvariavel);
          miadvariavel.setMnemonic(KeyEvent.VK_V);
          mtabela.add(miadtarefa);
          miadtarefa.setMnemonic(KeyEvent.VK_F);
          arquivo.add(abrir);
          abrir.setMnemonic(KeyEvent.VK_B);
          arquivo.add(guardar);
          guardar.setMnemonic(KeyEvent.VK_G);
          arquivo.addSeparator();
          arquivo.add(sair);
          sair.setMnemonic(KeyEvent.VK_S);
          barra.add(arquivo);
          barra.add(mtabela);
          jTabbedPane1 = new JTabbedPane();
          contentPane = (JPanel)this.getContentPane();
          paineltabela = new JPanel();
          painelgrafo = new JPanel();
          // jTabbedPane1
          jTabbedPane1.addTab("Tabela", paineltabela);
          jTabbedPane1.addTab("Grafo", painelgrafo);
          jTabbedPane1.addChangeListener(new ChangeListener() {
               public void stateChanged(ChangeEvent e)
                    painelvariavel.setVisible(false);
          // contentPane
          contentPane.setLayout(null);
          addComponent(contentPane, jTabbedPane1, 11,10,990,690);
          // paineltabela
          paineltabela.setLayout(null);
          // painelgrafo
          painelgrafo.setLayout(new FlowLayout(FlowLayout.CENTER, 5, 5));
          // Poseidon
          this.setTitle("UMa Poseidon");
          this.setLocation(new Point(2, 1));
          this.setSize(new Dimension(558, 441));
          this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
          this.setExtendedState(MAXIMIZED_BOTH);
     /** Add Component Without a Layout Manager (Absolute Positioning) */
     private void addComponent(Container container,Component c,int x,int y,int width,int height)
          c.setBounds(x,y,width,height);
          container.add(c);
     // TODO: Add any appropriate code in the following Event Handling Methods
     private void jTabbedPane1_stateChanged(ChangeEvent e)
          System.out.println("\njTabbedPane1_stateChanged(ChangeEvent e) called.");
          // TODO: Add any handling code here
     // TODO: Add any method code to meet your needs in the following area
     private class TratBarra implements ActionListener{
          public void actionPerformed(ActionEvent e){
               if(e.getSource() == sair){
                    int op = JOptionPane.showConfirmDialog(null, "Deseja mesmo fechar o aplicativo?","Sair", JOptionPane.YES_NO_OPTION);
                    if(op == JOptionPane.YES_OPTION){
                         System.exit(0);
               if(e.getSource() == miadvariavel){
                    final JFrame w = new JFrame();
                    new AdVariavel(w);
               if(e.getSource() == miadtarefa){
                    final JFrame w = new JFrame();
                    new AdTarefa(w);
//============================= Testing ================================//
//=                                                                    =//
//= The following main method is just for testing this class you built.=//
//= After testing,you may simply delete it.                            =//
//======================================================================//
     public static void main(String[] args)
          Spash sp = new Spash(3000);
          sp.mostraTela();
          JFrame.setDefaultLookAndFeelDecorated(true);
          JDialog.setDefaultLookAndFeelDecorated(true);
          try
               UIManager.setLookAndFeel("javax.swing.plaf.metal.MetalLookAndFeel");
          catch (Exception ex)
               System.out.println("Failed loading L&F: ");
               System.out.println(ex);
          new Poseidon();
//= End of Testing =
private class AdVariavel extends JDialog
     // Variables declaration
     private JLabel jLabel1;
     private JTextField jTextField1;
     private JButton varOK;
     private JButton varCancel;
     private JPanel contentPane;
     private JTextField jTextField2;
     private JList listadominio;
     private JScrollPane jScrollPane1;
     private JButton varAdiciona;
     private JButton varRemove;
     private JPanel jPanel1;
     private DefaultListModel modelo1;
     // End of variables declaration
     public AdVariavel(Frame w)
          super(w);
          initializeComponent();
          // TODO: Add any constructor code after initializeComponent call
          this.setVisible(true);
      * This method is called from within the constructor to initialize the form.
      * WARNING: Do NOT modify this code. The content of this method is always regenerated
      * by the Windows Form Designer. Otherwise, retrieving design might not work properly.
      * Tip: If you must revise this method, please backup this GUI file for JFrameBuilder
      * to retrieve your design properly in future, before revising this method.
     private void initializeComponent()
          modelo1 = new DefaultListModel();
          jLabel1 = new JLabel();
          jTextField1 = new JTextField();
          varOK = new JButton();
          varCancel = new JButton();
          contentPane = (JPanel)this.getContentPane();
          jTextField2 = new JTextField();
          listadominio = new JList(modelo1);
          jScrollPane1 = new JScrollPane();
          varAdiciona = new JButton();
          varRemove = new JButton();
          jPanel1 = new JPanel();
          // jLabel1
          jLabel1.setText("Nome da vari�vel:");
          // jTextField1
          jTextField1.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    jTextField1_actionPerformed(e);
          // varOK
          varOK.setText("OK");
          varOK.setMnemonic(KeyEvent.VK_O);
          varOK.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    varOK_actionPerformed(e);
          // varCancel
          varCancel.setText("Cancelar");
          varCancel.setMnemonic(KeyEvent.VK_C);
          varCancel.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    varCancel_actionPerformed(e);
          // contentPane
          contentPane.setLayout(null);
          addComponent(contentPane, jLabel1, 12,12,105,18);
          addComponent(contentPane, jTextField1, 118,10,137,22);
          addComponent(contentPane, varOK, 170,227,83,28);
          addComponent(contentPane, varCancel, 257,227,85,28);
          addComponent(contentPane, jPanel1, 12,42,332,180);
          // jTextField2
          jTextField2.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    jTextField2_actionPerformed(e);
          // listadominio
          listadominio.addListSelectionListener(new ListSelectionListener() {
               public void valueChanged(ListSelectionEvent e)
                    listadominio_valueChanged(e);
          // jScrollPane1
          jScrollPane1.setViewportView(listadominio);
          // varAdiciona
          varAdiciona.setText("Adicionar");
          varAdiciona.setMnemonic(KeyEvent.VK_A);
          varAdiciona.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    varAdiciona_actionPerformed(e);
          // varRemove
          varRemove.setText("Remover");
          varRemove.setMnemonic(KeyEvent.VK_R);
          varRemove.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    varRemove_actionPerformed(e);
          // jPanel1
          jPanel1.setLayout(null);
          jPanel1.setBorder(new TitledBorder("Dominio:"));
          addComponent(jPanel1, jTextField2, 17,22,130,22);
          addComponent(jPanel1, jScrollPane1, 165,21,154,144);
          addComponent(jPanel1, varAdiciona, 56,50,89,28);
          addComponent(jPanel1, varRemove, 57,84,88,28);
          // AdTarefas
          this.setTitle("Adicionar Variavel");
          this.setLocation(new Point(1, 0));
          this.setSize(new Dimension(367, 296));
          this.setLocationRelativeTo(null);
          this.setResizable(false);
     /** Add Component Without a Layout Manager (Absolute Positioning) */
     private void addComponent(Container container,Component c,int x,int y,int width,int height)
          c.setBounds(x,y,width,height);
          container.add(c);
     // TODO: Add any appropriate code in the following Event Handling Methods
     private void jTextField1_actionPerformed(ActionEvent e)
          System.out.println("\njTextField1_actionPerformed(ActionEvent e) called.");
          // TODO: Add any handling code here
     private void varOK_actionPerformed(ActionEvent e)
          System.out.println("\nvarOK_actionPerformed(ActionEvent e) called.");
          if (jTextField1 == null){
               return;
          if (jTextField1.getText().length()<1){
               JOptionPane.showMessageDialog(null,"N�o introduziu nenhuma variavel","AVISO", 1 );
               jTextField1.requestFocus();
               return;
          else {
               if (modelo1.getSize() == 0){
                    JOptionPane.showMessageDialog(null,"N�o introduziu nenhum dominio","AVISO", 1 );
                    return;
               else{
                    painelvariavel.add(scrollvariavel);
                    index = 0;
                    variavel = jTextField1.getText();
                    contastring = variavel.length();
                    System.out.println(contastring);
                    DefaultTableModel dtm = (DefaultTableModel)tabelavariavel.getModel();
                    tabelavariavel.getTableHeader().setBackground(Color.yellow);
                    dtm.addColumn(variavel, new Object[]{});
                    al = modelo1.getSize();
                    totallinhas = al;
                    for(int i = 0;i < modelo1.getSize();i++){
                         listadominio.setSelectedIndex(index) ;
                         Object dominio = listadominio.getSelectedValue();
                         dtm.addRow(new Object[]{dominio});
                         index ++;
                    tabelasvar[cont] = tabelavariavel;
                    cont++;
                    System.out.println(cont);
                    for(int i=0;i<cont;i++){
                         tabelateste = tabelasvar;
                         linhas = tabelateste.getRowCount();
                         if (linhas >= tamanholinhas){
                              tamanholinhas = linhas;
                    for (int i=0;i<cont;i++){
                         tabelateste = tabelasvar[i];
                         System.out.println(linhas);
                         linhas = tabelateste.getRowCount();
                         tabelateste.setRowHeight((tamanholinhas/linhas)*20);
                         tabelasvar[i] = tabelateste;
                         System.out.println(tabelateste);
               tabelavariavel = new JTable();
          scrollvariavel = new JScrollPane();
          painelvariavel.add(tabelavariavel);
          tabelavariavel.setBackground(Color.cyan);
     tabelavariavel.setAutoResizeMode(JTable.AUTO_RESIZE_ALL_COLUMNS);
               scrollvariavel.setViewportView(tabelavariavel);
               painelvariavel.setVisible(true);
     tabelavariavel.getTableHeader().setReorderingAllowed(false);
     this.setVisible(false);
     miadtarefa.setEnabled(true);
     miadvariavel.setEnabled(true);
     DefaultTableModel dtm = (DefaultTableModel)tabelatarefa.getModel();
               tabelatarefa.getTableHeader().setBackground(Color.yellow);
               controlalinhas = tamanholinhas - linhastarefa;
               for(int i = 0;i < controlalinhas;i++){
                         dtm.addRow(new Object[]{});
                         linhastarefa++;
               tabelatarefa.setRowHeight((tamanholinhas/linhas)*20);
          // TODO: Add any handling code here
     private void varCancel_actionPerformed(ActionEvent e)
          System.out.println("\nvarCancel_actionPerformed(ActionEvent e) called.");
          this.setVisible(false);
     private void jTextField2_actionPerformed(ActionEvent e)
          System.out.println("\njTextField2_actionPerformed(ActionEvent e) called.");
          // TODO: Add any handling code here
     private void listadominio_valueChanged(ListSelectionEvent e)
          System.out.println("\nlistadominio_valueChanged(ListSelectionEvent e) called.");
          if(!e.getValueIsAdjusting())
               Object o = listadominio.getSelectedValue();
               System.out.println(">>" + ((o==null)? "null" : o.toString()) + " is selected.");
               // TODO: Add any handling code here for the particular object being selected
     private void varAdiciona_actionPerformed(ActionEvent e)
          System.out.println("\nvarAdiciona_actionPerformed(ActionEvent e) called.");
          if(jTextField2.getText().length()>=1){
               modelo1.addElement(jTextField2.getText());
               jTextField2.setText("");
               jTextField2.requestFocus();
     private void varRemove_actionPerformed(ActionEvent e)
          System.out.println("\nvarRemove_actionPerformed(ActionEvent e) called.");
          int index = listadominio.getSelectedIndex();
          modelo1.remove(index);
     // TODO: Add any method code to meet your needs in the following area
private class AdTarefa extends JDialog
     // Variables declaration
     private JLabel jLabel1;
     private JTextField jTextField1;
     private JButton tarOK;
     private JButton tarCancel;
     private JPanel contentPane;
     private JPanel jPanel1;
     // End of variables declaration
     public AdTarefa(Frame w)
          super(w);
          initializeComponent();
          // TODO: Add any constructor code after initializeComponent call
          this.setVisible(true);
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always regenerated
     * by the Windows Form Designer. Otherwise, retrieving design might not work properly.
     * Tip: If you must revise this method, please backup this GUI file for JFrameBuilder
     * to retrieve your design properly in future, before revising this method.
     private void initializeComponent()
          jLabel1 = new JLabel();
          jTextField1 = new JTextField();
          tarOK = new JButton();
          tarCancel = new JButton();
          contentPane = (JPanel)this.getContentPane();
          // jLabel1
          jLabel1.setText("Nome da tarefa:");
          // jTextField1
          jTextField1.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    jTextField1_actionPerformed(e);
          // tarOK
          tarOK.setText("OK");
          tarOK.setMnemonic(KeyEvent.VK_O);
          tarOK.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    tarOK_actionPerformed(e);
          // tarCancel
          tarCancel.setText("Cancelar");
          tarCancel.setMnemonic(KeyEvent.VK_C);
          tarCancel.addActionListener(new ActionListener() {
               public void actionPerformed(ActionEvent e)
                    tarCancel_actionPerformed(e);
          // contentPane
          contentPane.setLayout(null);
          addComponent(contentPane, jLabel1, 12,12,105,18);
          addComponent(contentPane, jTextField1, 118,10,120,22);
          addComponent(contentPane, tarOK, 10,50,83,28);
          addComponent(contentPane, tarCancel, 153,50,85,28);
          // AdTarefas
          this.setTitle("Adicionar Tarefa");
          this.setLocation(new Point(1, 0));
          this.setSize(new Dimension(250, 120));
          this.setLocationRelativeTo(null);
          this.setResizable(false);
     /** Add Component Without a Layout Manager (Absolute Positioning) */
     private void addComponent(Container container,Component c,int x,int y,int width,int height)
          c.setBounds(x,y,width,height);
          container.add(c);
     // TODO: Add any appropriate code in the following Event Handling Methods
     private void jTextField1_actionPerformed(ActionEvent e)
          System.out.println("\njTextField1_actionPerformed(ActionEvent e) called.");
          // TODO: Add any handling code here
     private void tarOK_actionPerformed(ActionEvent e)
          System.out.println("\ntarOK_actionPerformed(ActionEvent e) called.");
          if (jTextField1 == null){
               return;
          if (jTextField1.getText().length()<1){
               JOptionPane.showMessageDialog(null,"N�o introduziu nenhuma tarefa","AVISO", 1 );
               jTextField1.requestFocus();
               return;
          else{
               String variavel = jTextField1.getText();
               DefaultTableModel dtm = (DefaultTableModel)tabelatarefa.getModel();
               dtm.addColumn(variavel,new Object[]{});
               controlalinhas = tamanholinhas - linhastarefa;
               for(int i = 0;i < controlalinhas;i++){
                         dtm.addRow(new Object[]{});
                         linhastarefa++;
               for(int i=0; i < tabelatarefa.getColumnCount(); i++){
                    tabelatarefa.getColumnModel().getColumn(i).setPreferredWidth(100);
               tabelatarefa.getColumnModel().getColumn(i).setResizable(false);
               tabelatarefa.getTableHeader().setBackground(Color.yellow);
               tabelatarefa.setRowHeight((tamanholinhas/linhas)*20);
               paineltarefa.setVisible(true);
     tabelatarefa.getTableHeader().setReorderingAllowed(true);
     this.setVisible(false);
     miadtarefa.setEnabled(true);
     miadvariavel.setEnabled(true);
     // TODO: Add any handling code here
     private void tarCancel_actionPerformed(ActionEvent e)
          System.out.println("\ntarCancel_actionPerformed(ActionEvent e) called.");
          this.setVisible(false);
now the code to create the JComboBox is here:
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
public class CaixaCombinacao extends JComboBox{
     ImageIcon[] imagens;
    String[] op = {"x", "check"};
public CaixaCombinacao(){
     imagens = new ImageIcon[op.length];
    Integer[] intArray = new Integer[op.length];
    for (int i = 0; i < op.length; i++) {
         intArray[i] = new Integer(i);
        imagens[i] = createImageIcon("imagens/" + op[i] + ".gif");
        this.addItem(imagens);
if (imagens[i] != null) {
imagens[i].setDescription(op[i]);
     JComboBox lista = new JComboBox(intArray);
     ComboBoxRenderer renderer= new ComboBoxRenderer();
     lista.setRenderer(renderer);
protected static ImageIcon createImageIcon(String path) {
java.net.URL imgURL = CaixaCombinacao.class.getResource(path);
if (imgURL != null) {
     return new ImageIcon(imgURL);
return null;
class ComboBoxRenderer extends JLabel
implements ListCellRenderer {
public ComboBoxRenderer() {
setOpaque(true);
setHorizontalAlignment(CENTER);
setVerticalAlignment(CENTER);
public Component getListCellRendererComponent(
JList list,
Object value,
int index,
boolean isSelected,
boolean cellHasFocus) {
               int selectedIndex = ((Integer)value).intValue();
               if (isSelected) {
setBackground(list.getSelectionBackground());
setForeground(list.getSelectionForeground());
} else {
setBackground(list.getBackground());
setForeground(list.getForeground());
               ImageIcon icon = imagens[selectedIndex];
               String opc = op[selectedIndex];
setIcon(icon);
return this;

I'm sure 90% of the code posted here has nothing to do with displaying images in a JTable.
Here is an example that shows how to display an icon in a table:
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
public class TableIcon extends JFrame
     public TableIcon()
          String[] columnNames = {"Picture", "Description"};
          Object[][] data =
               {new ImageIcon("copy16.gif"), "Copy"},
               {new ImageIcon("add16.gif"), "Add"},
          DefaultTableModel model = new DefaultTableModel(data, columnNames);
          JTable table = new JTable( model )
               // Returning the Class of each column will allow different
               // renderers to be used based on Class
               public Class getColumnClass(int column)
                    return getValueAt(0, column).getClass();
          table.setPreferredScrollableViewportSize(table.getPreferredSize());
          JScrollPane scrollPane = new JScrollPane( table );
          getContentPane().add( scrollPane );
     public static void main(String[] args)
          TableIcon frame = new TableIcon();
          frame.setDefaultCloseOperation( EXIT_ON_CLOSE );
          frame.pack();
          frame.setVisible(true);
}If this doesn't help then post a similiar demo program that shows the problems you are having, not your entire application.

JLabel ImageIcon not opaque.

Hi I am having a little problem with my program that I am trying to develop.
I have created a JFrame and instead of having the background the usual grey I have used an image.
I then wanted to create some nice big buttons with nice smooth curved edges but was having trouble using the JButton so decicded to use a JLabel and attach a MouseListener to it. This seems to be working fine at the mo.
The only problem is that instead of my nice gradient filled background being displayed I get a big white border around the JLabel. The rest of the background is perfectly displayed having only a problem around the JLabel. I have tried not using a background image and it shows the JLabel correctly and the button looks nice and smooth.
I think it might be something to do with the rendering sequence maybe but I am at a loss. If any one has any ideas on how to fix it or a better way of doing it I would be most grateful.
Many thanks for your help in advance.
Matt
PS now heres my code:
public class GUI extends JFrame implements MouseListener {
     ImageIcon icon;
     JPanel buttonPanel = new JPanel();
     public GUI(){
          super("Property Works - Estate Agent Management System");
          icon = new ImageIcon("images/bg.jpg");
          JPanel panel = new JPanel(){
               protected void paintComponent(Graphics g){
                    //g.drawImage(icon.getImage(), 0, 0, null);
                    Dimension d = getSize();
                    //g.drawImage(icon.getImage(), 0, 0, d.width, d.height, null);
                    super.paintComponent(g);
          panel.setOpaque(false);
          addButton();
          panel.add(buttonPanel);
          getContentPane().add(panel);
          setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
          setExtendedState(JFrame.MAXIMIZED_BOTH);
          setVisible(true);
     public void addButton(){
          ImageIcon icon1 = new ImageIcon("images/buttons/addProperty.gif");
          JLabel addProperty = new JLabel(icon1);
          addProperty.setOpaque(false);
          addProperty.setToolTipText("Add a new property");
          addProperty.addMouseListener(this);
          JLabel tester = new JLabel("Tester");
          tester.setOpaque(false);
          buttonPanel.add(addProperty);
          buttonPanel.add(tester);
     public void mousePressed(MouseEvent arg0) {
          // TODO Auto-generated method stub
          System.out.println("Button Clicked");
}

Swing related questions should be posted in the Swing forum.
Use the "code" tags when you post code so the formatting is retained.
The code you posted doesn't compile so we can't see the incorrect behaviour.
Using code I already have I do not see any white border around the image. I tested using a "Duke" image which is found in many of the Swing tutorial examples. Maybe your image is the problem.

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