Problem displaying image in jpanel

Hi,I have posted this on the applet board, but I think its also a general programming problem, so apologies if it isn't relevant to this board, just say so and I'll remove it!
I've got an applet that receives a variable from a PHP page as a parameter. The variable is "map1.png" the map this variable refers to sits in the same folder as the applet.
I want to use this variable along with getDocumentBase() to create a URL which will then be used to display an image within a jPanel called mapPane.
the code I currently have is:
// get image url
String mapURL = getParameter("mapURL");
//set variable for image
Image map_png;
// set media tracker
MediaTracker mt;
//initialise media tracker
mt = new MediaTracker(this);
map_png = getImage(getDocumentBase(),mapURL);
// tell the MediaTracker to kep an eye on this image, and give it ID 1;
mt.addImage(map_png,1);
// now tell the mediaTracker to stop the applet execution
// until the images are fully loaded.
try
mt.waitForAll();
catch (InterruptedException e) {}
// draw image onto mapPane
mapPane.getGraphics().drawImage(map_png, 200, 200, null);
Currently the Parameter is being passed into the applet (i've written it out within the applet) but the image is not being displayed. Does anyone have any suggestions about what I'm doing wrong?
Cheers
Steve

hi,
No, don't get any exceptions, the Java Console has a message:
<terminated>JavaImageEditor[Java Applet]C:\Program Files\Java\jre1.6.0\bin\javaw.exe
Cheers
Steve

Similar Messages

Problems displaying image in JPanel

Hi, I've got an applet that receives a variable from a PHP page as a parameter. The variable is "map1.png" the map this variable refers to sits in the same folder as the applet.
I want to use this variable along with getDocumentBase() to create a URL which will then be used to display an image within a jPanel called mapPane.
the code I currently have is:
// get image url
        String mapURL = getParameter("mapURL");
        //set variable for image
        Image map_png;
        // set media tracker
        MediaTracker mt;
        //initialise media tracker
        mt = new MediaTracker(this);
        map_png = getImage(getDocumentBase(),mapURL);
        // tell the MediaTracker to kep an eye on this image, and give it ID 1;
        mt.addImage(map_png,1);
        // now tell the mediaTracker to stop the applet execution
        // until the images are fully loaded.
        try
             mt.waitForAll();
        catch (InterruptedException e) {}
        // draw image onto mapPane
        mapPane.getGraphics().drawImage(map_png, 200, 200, null);Currently the Parameter is being passed into the applet (i've written it out within the applet) but the image is not being displayed. Does anyone have any suggestions about what I'm doing wrong?
Cheers
Steve

Hello,
after an update of the graphics card driver to the newest just released version the problem has vanished.
Regards

Need to display image on JPanel

Hello
I am trying to implement a graphical version of the Knights Tour. I am done with the algorithm part of the problem itself. I am having problem with displaying the chess board. Although seemingly straightforward the images will not display on the JPanel. Below is a sample of what I am trying to do. Can anyone explain why the code does not work even though it seems okay. Thanks and best regards.
import javax.swing.*;
import java.awt.*;
import java.awt.image.*;
import java.awt.event.*;
public class test extends JFrame {
public test(){
panel pane = new panel();
getContentPane().add(pane);
public static void main(String[]args){
test tst = new test();
tst.setSize(500,500);
tst.show();
public class panel extends JPanel{ // inner class
private Image img;
private ImageIcon icon;
public panel(){
icon = new ImageIcon("cross.gif");
img = icon.getImage();
public void paintComponent(Graphics g)
super.paintComponent(g);
Graphics2D g2d = (Graphics2D)g;
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package com.lc.util.swing ;
import java.awt.Color ;
import java.awt.Graphics ;
import java.awt.Image;
import java.awt.Insets;
import java.awt.Dimension ;
import java.awt.image.ImageObserver ;
import javax.swing.JPanel;
import javax.swing.border.Border;
* Panel displaying an {@link Image}.
* <ul>
* <li>8 positions,</li>
* <li>
* can stretch image for filling the whole available area, or diminish
* its size if too large in width or height,
* </li>
* <li>respects borders (as defined by
* {@link javax.swing.JComponent#setBorder( javax.swing.border.Border ) JComponent.setBorder}
* </li>
* </ul>
* @author Laurent Caillette
* @version $Revision: 1.1.1.1 $ $Date: 2002/02/19 22:12:04 $
public class JImagePanel extends JPanel {
public JImagePanel() {
imageObserver = this ;
* Constructeur assignant une image.
public JImagePanel( Image image ) {
this() ;
setImage( image ) ;
private Image image ;
private ImageObserver imageObserver ;
public void setImage( Image image ) {
this.image = image ;
adjustPreferredSize();
public void setBorder( Border newBorder ) {
super.setBorder( newBorder ) ;
adjustPreferredSize() ;
private void adjustPreferredSize() {
if( image != null ) {
int w = image.getWidth( imageObserver ) ;
int h = image.getHeight( imageObserver ) ;
Border border = getBorder() ;
if( border != null ) {
Insets insets = border.getBorderInsets( this ) ;
if( insets != null ) {
w += ( insets.left + insets.right ) ;
h += ( insets.top + insets.bottom ) ;
Dimension dim = new Dimension( w, h ) ;
this.setPreferredSize( dim ) ;
private int placement = CENTER ;
public int getPlacement() { return placement ; }
public void setPlacement( int placement ) {
if( ( placement < CENTER ) || ( placement > STRETCH ) ) {
throw new IllegalArgumentException( "Unsupported placement value" ) ;
this.placement = placement ;
public void paint( Graphics gr ) {
// x of Image to draw
int x ;
// y of Image to draw
int y ;
// width of Image to draw
int iw ;
// height of Image to draw
int ih ;
// thickness of left border
int bl = 0 ;
// thickness of upper border
int bt = 0 ;
// thickness of right border
int br = 0 ;
// thickness of lower border
int bb = 0 ;
// width of drawable area
int pw = this.getWidth() ;
// height of drawable area
int ph = this.getHeight() ;
// Handle borders
Insets insets = null ;
Border border = getBorder() ;
if( border != null ) {
insets = getBorder().getBorderInsets( this ) ;
if( insets != null ) {
bl = insets.left ;
br = insets.right ;
bb = insets.bottom ;
bt = insets.top ;
pw = pw - bl - br ;
ph = ph - bt - bb ;
// Always display background, for supporting transparency.
super.paint( gr ) ;
if( image != null ) {
iw = image.getWidth( imageObserver ) ;
ih = image.getHeight( imageObserver ) ;
if( ( placement == STRETCH ) ||
( iw > pw ) ||
( ih > ph )
gr.drawImage(image, bl, bt, pw, ph, imageObserver ) ;
} else {
iw = image.getWidth( imageObserver ) ;
ih = image.getHeight( imageObserver ) ;
switch( placement ) {
case CENTER :
x = ( pw - iw ) / 2 ;
y = ( ph - ih ) / 2 ;
break ;
case NORTH :
x = ( pw - iw ) / 2 ;
y = 0 ;
break ;
case NORTHEAST :
x = pw - iw ;
y = 0 ;
break ;
case EAST :
x = pw - iw ;
y = (ph - ih ) / 2 ;
break ;
case SOUTHEAST :
x = pw - iw ;
y = ph - ih ;
break ;
case SOUTH :
x = ( pw - iw ) / 2 ;
y = ph - ih ;
break ;
case SOUTHWEST :
x = 0 ;
y = ph - ih ;
break ;
case WEST :
x = 0 ;
y = ( ph - ih ) / 2 ;
break ;
case NORTHWEST :
x = 0 ;
y = 0 ;
break ;
default :
throw new IllegalArgumentException(
"Unsupported placement value" ) ;
// Add border offset
x += bl ;
y += bt ;
gr.drawImage( image, x, y, this ) ;
public final static int CENTER = 0 ;
public final static int NORTH = 1 ;
public final static int NORTHEAST = 2 ;
public final static int EAST = 3 ;
public final static int SOUTHEAST = 4 ;
public final static int SOUTH = 5 ;
public final static int SOUTHWEST = 6 ;
public final static int WEST = 7 ;
public final static int NORTHWEST = 8 ;
public final static int STRETCH = 9 ;

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Hi,
I am fetching images from database. I am saving this image, display in JPanel and delete it. But this is not actually I want.
I wish to fetch this image as stream , store in memory and display in JPanel without saving any fiel in disk.
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In what format is the image coming to you from the database? If it's an InputStream subclass, just use javax.imageio.ImageIO:
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^
1 error
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Hello, I am having problems trying to display an image on a Panel which is attached to a Frame. I can display an Image on the Frame with no difficulty, however nothing appears when I try to draw on the Panel.
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img =
=
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//container class for the image panel
public class ImagePanel extends Panel {
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public ImagePanel(Image image) {
this.image = image;
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public void paint( Graphics g )
// draw the original image
g.drawImage( image, 1, 1, this );

Simple and efficient way to display image on jpanel

AOA
What may be the simple and efficient way
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Bindable][
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Embed(source="assets/images/itv_small.png")]
public var image2:Class;
Bindable][
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if(str == obj1.label){profile1NewsAndSporttempAC1.addItem(obj1);
continue;}
if(profile1NewsAndSporttempAC1.length > 0){profile1NewsAndSportAddLinksTilelist.dataProvider = profile1NewsAndSporttempAC1;
if(profile1NewsAndSportSO.data.profile1NewsAndSportchoiceList){
var profile1NewsAndSportchoiceList:Array = profile1NewsAndSportSO.data.profile1NewsAndSportchoiceList.split(",");
var profile1NewsAndSporttempAC2:ArrayCollection = new ArrayCollection();
for each(var str2:String in profile1NewsAndSportchoiceList){
for each(var obj2:Object in profile1NewsAndSportaddLinksAC){
if(str2 == obj2.label){profile1NewsAndSporttempAC2.addItem(obj2);
continue;}
if(profile1NewsAndSporttempAC2.length > 0){profile1NewsAndSportLinkChoice.dataProvider = profile1NewsAndSporttempAC2;
else{profile1NewsAndSportReset();
private function saveprofile1NewsAndSport(event:MouseEvent):void{
var profile1NewsAndSportaddList:String = "";
if(profile1NewsAndSportAddLinksTilelist.dataProvider){
if(ArrayCollection(profile1NewsAndSportAddLinksTilelist.dataProvider).length > 0){
for each(var obj1:Object inprofile1NewsAndSportAddLinksTilelist.dataProvider){
profile1NewsAndSportaddList += obj1.label +
else{profile1NewsAndSportaddList =
"empty";}
profile1NewsAndSportSO.data.profile1NewsAndSportaddList = profile1NewsAndSportaddList;
var profile1NewsAndSportchoiceList:String = "";
for each(var obj2:Object inprofile1NewsAndSportLinkChoice.dataProvider){
profile1NewsAndSportchoiceList += obj2.label +
profile1NewsAndSportSO.data.profile1NewsAndSportchoiceList = profile1NewsAndSportchoiceList;
profile1NewsAndSportSO.flush();
]]>
</mx:Script>
<mx:TileList id="profile1NewsAndSportAddLinksTilelist" fontWeight="bold" dragEnabled="true" dragMoveEnabled="true" dropEnabled="true" height="292" width="650" left="21" columnCount="5" rowHeight="145" columnWidth="125" itemClick="titleLabel.text=profile1NewsAndSportAddLinksTilelist.selectedItem.title; websiteLinkLabel.text=profile1NewsAndSportAddLinksTilelist.selectedItem.link; descLabel.text=profile1NewsAndSportAddLinksTilelist.selectedItem.description; linkImage.source=profile1NewsAndSportAddLinksTilelist.selectedItem.largeImage;" itemDoubleClick="{navigateToURL(new URLRequest('http://' + profile1NewsAndSportAddLinksTilelist.selectedItem.link))}" doubleClickEnabled="true" backgroundColor="#000000" borderColor="#FFFFFF" color="#FFFFFF" borderSides="top right left" y="25"/>
<mx:Canvas id="SitePreviewArea" y="10" width="453" height="540" backgroundColor="#545050" cornerRadius="20" borderStyle="solid" x="692" borderThickness="2" dropShadowEnabled="true" borderColor="#000000">
<mx:Label x="45" y="309" text="Website Name:" width="150" height="52" fontSize="14" fontWeight="bold" color="#FFFFFF" left="10"/>
<mx:Label x="150.5" y="309" id="titleLabel" width="282.5" height="24" fontWeight="bold" fontSize="14" color="#FCFF00"/>
<mx:Label x="124.5" y="385" text="Website Description:" width="200" height="24" fontSize="14" fontWeight="bold" color="#FFFFFF" textAlign="center"/>
<mx:TextArea x="16" y="417" id="descLabel" width="421" height="69" textAlign="left" color="#FCFF00" borderThickness="0" backgroundColor="#545050" editable="false" enabled="true" disabledColor="#FFFFFF" backgroundDisabledColor="#545050" fontWeight="bold" fontSize="12"/>
<mx:Label x="61" y="342" text="Website Link:" width="150" height="52" fontSize="14" fontWeight="bold" color="#FFFFFF" left="10"/>
<mx:TextArea x="150.5" y="343" id="websiteLinkLabel" width="282.5" height="33" fontWeight="bold" fontSize="12" color="#FCFF00" borderThickness="0" backgroundColor="#545050" editable="false" enabled="true" disabledColor="#FCFF00" backgroundDisabledColor="#545050"/>
<mx:Button id="goToSiteButton" top="494" left="168" label="VISIT SITE" fontWeight="bold" fontSize="14" color="#000000" click="{navigateToURL(new URLRequest('http://' + websiteLinkLabel.text))}" fillAlphas="[1.0, 1.0]" fillColors="[#FFFFFF, #DCDCDC]" borderColor="#000000"/>
<mx:Canvas x="99.5" y="51" width="250" height="250" backgroundColor="#FFFFFF">
<mx:Image id="linkImage" click="{navigateToURL(new URLRequest('http://' + websiteLinkLabel.text))}" width="250" height="250" x="0" y="0" scaleContent="true" top="2" right="2" left="2" bottom="2"/>

No thats not what I meant sorry. I have two versions with the same code. One a regular Flex app and one an AIR version but the code is of course exactly the same except for the WindowedApplication part. I only posted the flex app version code incase someone could take a look at it and modify it for me. It's just that the application needs to use the shared object method like in that code but it also needs to display the relevant image on the right hand panel when the app is installed on a user's machine.
Here's the code for the AIR version:-
<?xml version="1.0" encoding="utf-8"?><mx:WindowedApplication
xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" creationComplete="initprofile1NewsAndSportSO()" viewSourceURL="srcview/index.html">
<mx:Script>
<![CDATA[
Bindable][
Embed(source="assets/images/bbcnews_small.png")]
public var image1:Class;
Bindable][
Embed(source="assets/images/itv_small.png")]
public var image2:Class;
Bindable][
Embed(source="assets/images/skynews_small.png")]
public var image3:Class;
]]>
</mx:Script>
<mx:Script>
<![CDATA[
import mx.collections.*;
import flash.net.SharedObject;
public var profile1NewsAndSportSO:SharedObject;
private var profile1NewsAndSportaddLinksFullAC:ArrayCollection = new ArrayCollection([{link:
"www.bbcnews.com", label:"BBC News", icon:"image1", largeImage:"assets/images/bbcnews_small.png", title:"BBC News", description:"BBC News description will go here"},{link:
"www.itv.com/", label:"ITV", icon:"image2", largeImage:"assets/images/itv_small.png", title:"ITV", description:"ITV Description will go here"},{link:
"www.skynews.com", label:"Sky News", icon:"image3", largeImage:"assets/images/skynews_small.png", title:"Sky News", description:"Sky News Description will go here"}]);
private var profile1NewsAndSportaddLinksAC:ArrayCollection = new ArrayCollection([{link:
"www.bbcnews.com", label:"BBC News", icon:"image1", largeImage:"assets/images/bbcnews_small.png", title:"BBC News", description:"BBC News description will go here"},{link:
"www.itv.com/", label:"ITV", icon:"image2", largeImage:"assets/images/itv_small.png", title:"ITV", description:"ITV Description will go here"},{link:
"www.skynews.com", label:"Sky News", icon:"image3", largeImage:"assets/images/skynews_small.png", title:"Sky News", description:"Sky News Description will go here"}]);
private function profile1NewsAndSportReset():void{resetprofile1NewsAndSportAC();
profile1NewsAndSportAddLinksTilelist.dataProvider
= profile1NewsAndSportaddLinksAC;
profile1NewsAndSportLinkChoice.dataProvider =
new ArrayCollection([]);}
private function resetprofile1NewsAndSportAC():void{profile1NewsAndSportaddLinksAC.removeAll();
for each(var obj:Object in profile1NewsAndSportaddLinksFullAC){profile1NewsAndSportaddLinksAC.addItem(obj);
private function initprofile1NewsAndSportSO():void{profile1NewsAndSportSO = SharedObject.getLocal(
"profile1NewsAndSport");
if(profile1NewsAndSportSO.size > 0){
if(profile1NewsAndSportSO.data.profile1NewsAndSportaddList){
if(profile1NewsAndSportSO.data.profile1NewsAndSportaddList != "empty"){
var profile1NewsAndSportaddList:Array = profile1NewsAndSportSO.data.profile1NewsAndSportaddList.split(",");
var profile1NewsAndSporttempAC1:ArrayCollection = new ArrayCollection();
for each(var str:String in profile1NewsAndSportaddList){
for each(var obj1:Object in profile1NewsAndSportaddLinksAC){
if(str == obj1.label){profile1NewsAndSporttempAC1.addItem(obj1);
continue;}
if(profile1NewsAndSporttempAC1.length > 0){profile1NewsAndSportAddLinksTilelist.dataProvider = profile1NewsAndSporttempAC1;
if(profile1NewsAndSportSO.data.profile1NewsAndSportchoiceList){
var profile1NewsAndSportchoiceList:Array = profile1NewsAndSportSO.data.profile1NewsAndSportchoiceList.split(",");
var profile1NewsAndSporttempAC2:ArrayCollection = new ArrayCollection();
for each(var str2:String in profile1NewsAndSportchoiceList){
for each(var obj2:Object in profile1NewsAndSportaddLinksAC){
if(str2 == obj2.label){profile1NewsAndSporttempAC2.addItem(obj2);
continue;}
if(profile1NewsAndSporttempAC2.length > 0){profile1NewsAndSportLinkChoice.dataProvider = profile1NewsAndSporttempAC2;
else{profile1NewsAndSportReset();
private function saveprofile1NewsAndSport(event:MouseEvent):void{
var profile1NewsAndSportaddList:String = "";
if(profile1NewsAndSportAddLinksTilelist.dataProvider){
if(ArrayCollection(profile1NewsAndSportAddLinksTilelist.dataProvider).length > 0){
for each(var obj1:Object inprofile1NewsAndSportAddLinksTilelist.dataProvider){
profile1NewsAndSportaddList += obj1.label +
else{profile1NewsAndSportaddList =
"empty";}
profile1NewsAndSportSO.data.profile1NewsAndSportaddList = profile1NewsAndSportaddList;
var profile1NewsAndSportchoiceList:String = "";
for each(var obj2:Object inprofile1NewsAndSportLinkChoice.dataProvider){
profile1NewsAndSportchoiceList += obj2.label +
profile1NewsAndSportSO.data.profile1NewsAndSportchoiceList = profile1NewsAndSportchoiceList;
profile1NewsAndSportSO.flush();
]]>
</mx:Script>
<mx:TileList id="profile1NewsAndSportAddLinksTilelist" fontWeight="bold" dragEnabled="true" dragMoveEnabled="true" dropEnabled="true" height="292" width="650" left="21" columnCount="5" rowHeight="145" columnWidth="125" itemClick="titleLabel.text=profile1NewsAndSportAddLinksTilelist.selectedItem.title; websiteLinkLabel.text=profile1NewsAndSportAddLinksTilelist.selectedItem.link; descLabel.text=profile1NewsAndSportAddLinksTilelist.selectedItem.description; linkImage.source=profile1NewsAndSportAddLinksTilelist.selectedItem.largeImage;" itemDoubleClick="{navigateToURL(new URLRequest('http://' + profile1NewsAndSportAddLinksTilelist.selectedItem.link))}" doubleClickEnabled="true" backgroundColor="#000000" borderColor="#FFFFFF" color="#FFFFFF" borderSides="top right left" y="25"/>
<mx:Canvas id="SitePreviewArea" y="10" width="453" height="540" backgroundColor="#545050" cornerRadius="20" borderStyle="solid" x="692" borderThickness="2" dropShadowEnabled="true" borderColor="#000000">
<mx:Label x="45" y="309" text="Website Name:" width="150" height="52" fontSize="14" fontWeight="bold" color="#FFFFFF" left="10"/>
<mx:Label x="150.5" y="309" id="titleLabel" width="282.5" height="24" fontWeight="bold" fontSize="14" color="#FCFF00"/>
<mx:Label x="124.5" y="385" text="Website Description:" width="200" height="24" fontSize="14" fontWeight="bold" color="#FFFFFF" textAlign="center"/>
<mx:TextArea x="16" y="417" id="descLabel" width="421" height="69" textAlign="left" color="#FCFF00" borderThickness="0" backgroundColor="#545050" editable="false" enabled="true" disabledColor="#FFFFFF" backgroundDisabledColor="#545050" fontWeight="bold" fontSize="12"/>
<mx:Label x="61" y="342" text="Website Link:" width="150" height="52" fontSize="14" fontWeight="bold" color="#FFFFFF" left="10"/>
<mx:TextArea x="150.5" y="343" id="websiteLinkLabel" width="282.5" height="33" fontWeight="bold" fontSize="12" color="#FCFF00" borderThickness="0" backgroundColor="#545050" editable="false" enabled="true" disabledColor="#FCFF00" backgroundDisabledColor="#545050"/>
<mx:Button id="goToSiteButton" top="494" left="168" label="VISIT SITE" fontWeight="bold" fontSize="14" color="#000000" click="{navigateToURL(new URLRequest('http://' + websiteLinkLabel.text))}" fillAlphas="[1.0, 1.0]" fillColors="[#FFFFFF, #DCDCDC]" borderColor="#000000"/>
<mx:Canvas x="99.5" y="51" width="250" height="250" backgroundColor="#FFFFFF">
<mx:Image id="linkImage" click="{navigateToURL(new URLRequest('http://' + websiteLinkLabel.text))}" width="250" height="250" x="0" y="0" scaleContent="true" top="2" right="2" left="2" bottom="2"

How to display image at jpanel in application GUI

i wana load an image from given location to my GUI when application starts.
according to my perception this code should load image but its not working.
Will any body kindly help me and point out the "reasons" for not working following piece of code from my application.
public class MainFrame extends JFrame
JPanel jPanel1 = new JPanel();
JPanel jPanel2 = new JPanel();
JButton jButton1 = new JButton();
JButton jButton2 = new JButton();
Image image = Toolkit.getDefaultToolkit().createImage("c:\\form-3.jpg");
javax.swing.JScrollBar jScrollBar1 = new JScrollBar();
BorderLayout borderLayout1 = new BorderLayout();
public MainFrame()
try
jbInit();
} catch (Exception ex)
ex.printStackTrace();
public static void main(String[] args)
MainFrame mainFrame = new MainFrame();
private void jbInit() throws Exception
     //jbInit() defined here
public void paintComponent(Graphics g)
// jPanel1.getGraphics().drawImage(image,0,0,jPanel1);
Graphics2D g2D = (Graphics2D) g;
BufferedImage bi = (BufferedImage) createImage(getWidth(),getHeight());
bi.createGraphics().drawImage(image, 0,0, jPanel1);
// g.drawImage(image,0,0,jPanel1);
public void jButton2_mouseClicked(MouseEvent e)
     public void jButton1_mouseClicked(MouseEvent e)
this.dispose();
System.exit( 0 );
/////////////////////////////////////////////////////////////////////////////

this works OK
(stripped of everything unrelated to your question)
import javax.swing.*;
import java.awt.*;
class MainFrame extends JFrame
Image image = Toolkit.getDefaultToolkit().createImage("test.gif");
public static void main(String[] args)
    MainFrame mainFrame = new MainFrame();
    mainFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    mainFrame.setSize(200,200);
    mainFrame.setVisible(true);
public void paint(Graphics g)//<-----heavyweight component
    super.paint(g);
    g.drawImage(image,50,50,this);
}

Problem displaying image in jpanel

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