Displaying images in an applet

Hi everyone.
I have been developing an applet game in the applet viewer - which it works fine in. But when I open it in a browser, everything is displayed appart from the image - can't figure out why!
Is it the way I am adding images to the display, this is how i am doing it at the moment....
public static ImageIcon gameInfoPanelTitle = new ImageIcon("images/gameinformation.jpg");
JLabel gameInfoPanelIntro = new JLabel(gameInfoPanelTitle);
contentPane.add(gameInfoPanelIntro);thanks in advance guys!

Check your Sun Java console. It may be generating NullPointerExceptions (or some other exception) when loading the images. This could be a result of the file path. When you access it using a browser, you're not downloading it across a network, from, say, a server, are you? That would definitely cause that problem.

Similar Messages

Display images in applets

hi every body.
I want to display images in an applet when i invoke it from the jsp page . it is not working. the code is as follows.
<html>
<body>
<jsp:plugin type = "applet"
code ="Welcome.class"
width="475" height = "350" >
</jsp:plugin>
</body>
</html>
while the code of "Welcome.java" is as follows.
ImageIcon image = new ImageIcon("aa.gif");
JButton button = new JButton(image);
i have placed the aa.gif file in the same directory where i placed the Welcome.class and the jsp file.
when i run this program the i recieve the message that the applet is not loaded.
can some body help me how to place images in applets.
thanks.

You should be able to test that applet on you hard drive first. If it works check the case of the image file.
Web servers look for case. If you are asking for ImageIcon img = new ImageIcon("abc.gif") and what is loaded on your web server is "abc.GIF" it won't find it. Same goes for basic HTML tags like
<Img src=abc.gif>. But it will find it on you hard drive when you run the applet there.

Displaying image on the button

hi there,
well i wanna display image on my applet button from the relative path how do i do.
here is my code which i tried gave me nullpointer exception and i did put this code my applets constructor:
URL url1 = new URL(getDocumentBase().toString()+"b.gif");
ImageIcon image1 = new ImageIcon(url1);
JButton button = new JButton(image1);

SanderSander
the code u have given failed to work well here is the code which i tried :
ImageIcon image1 = new ImageIcon(getImage(getCodeBase(),"b.gif"));
JButton button = new JButton(image1);
and here is the html code for applet :


<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<COMMENT><SCRIPT LANGUAGE="JavaScript1.1"></SCRIPT></COMMENT>
<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<APPLET CODE = "GPTextEditor" WIDTH = "500" HEIGHT = "300"></XMP>
<PARAM NAME = CODE VALUE = "GPTextEditor" >
<PARAM NAME = CODEBASE VALUE = "http://192.168.1.50/paddy/ns/ns" >
<PARAM NAME=MAYSCRIPT VALUE=TRUE>
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.3">
<PARAM NAME="scriptable" VALUE="true">
</APPLET>
</NOEMBED></EMBED></OBJECT>
i m using swing applet.....

Displaying image on applet

i have a server and a client program... i need to send an image from the server program and display it on the applet.... i think it can be done by ImageIcon(byte[] ImageData) in the applet.... i hope someone writes a code for me to make stream of byte of the image on the server side and recieve the stream on the applet side and display the image....
Thanks in advance...
Uzair

public class Server {
    private static final int port = 2573;
    public static void main(String[] args) {
        FileInputStream FIS;
        try {
            FIS = new FileInputStream(args[0]);
        }catch(Exception e) {
            e.printStackTrace();
            return;
        byte[] data = new byte[FIS.available()];
        FIS.read(data);
        FIS.close();
        System.out.println("Image read. Waiting for client...");
        Socket socket;
        OutputStream stream;
        try{
            socket = (new ServerSocket(port)).accept();
            stream = socket.getOutputStream();
        }catch(Exception e){
            e.printStackTrace();
            return;
        System.out.println("Client connected. Sending image...");
        stream.write(data);
        stream.close();
        System.out.println("Done. Good Luck Client!");
public class Client {
    private static final String host = "localhost";
    private static final int port = 2573;
    public static void main(String[] args) {
        System.out.println("Connecting to Server...");
        Socket socket;
        InputStream stream;
        byte[] buffer = new buffer[1048576], data;
        int i, read, total = 0;
        ImageIcon image;
        try{
            socket = new Socket(host, port);
            stream = socket.getInputStream();
            System.out.println("Connected. Reading data...");
            while((read = stream.read(buffer, total, buffer.length - total)) >= 0)
                total += read;
            data = new byte[total];
            System.arraycopy(buffer, 0, data, 0, total);
            image = new ImageIcon(data);
        }catch(Exception e){
            e.printStackTrace();
            return;
        System.out.println("Image retrieved! Doing something about it now...");
        //Your code for displaying the image somewhere in the applet
}Hope this helps~
Alex Lam S.L.

Displaying an image in an applet

hi there - can anyone tell me why the following code only displays the image through the applet viewer but when i load it in a browser it just displays a grey square the same size as the image i'm trying to load?! many thanks.
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(), "map.jpg"));
          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;

Rat fans!

Image Processing using applet

hi,
I am doing my project in java.My project is " Online Image Processing ".
I did some processing like gray Scale, Invert , Contrast and rotate 90 degree.
can any one help me for
1. I vant to rotate Image to 1 degree...
2. How to get Blure and Sharpen image?
3. Can i append frames inside applet?
plz Help me ..

I did not read the content of the links (To lazy) just found them for you.
You say that the examples use frames:
this should not be a problem as the required code is the same.
Tip:
How whould you display a image in a frame?
How whould you display a image in a applet?
Concentrate on the above 2 and simply change the code accordingly.
This should be easy also try asking google.

Help with displaying images (gif, jpeg...) within a JFrame (or similar)

Hi all,
i'm new to the forum and i'll be granted if you kind gentlemen/women could use some advices for my gui home application.
My purpose is to display a static image in a container (i'd prefer to use javax.swing objects, but if you think that java.awt is more suitable for my app, please feel free to tell me about...). I used a modified code from one of the Java Tutorial's examples, tht actually is an applet and displays images as it is using the paint() method. I just can't realize how to set the GraphicContext in a JFrame or a JPanel to contain the image to display, without using applets. Following part of the code I use (a JButton will fire JApplet start, JApplet is another class file called Apple.java):
class DMToolz extends JFrame {
     private static final long serialVersionUID = 1L;
     private JPanel jContentPane = null;
     private JButton jButton = null;
     private JComboBox jComboBox = null;
     private JMenuItem jMenuItem = null;
     private JMenuBar jJMenuBar = null;
     private JMenu jMenu = null;
     private JMenu jMenu1 = null;
     public int w=10, h=10;
     public String filename;
      * @throws HeadlessException
     public DMToolz() throws HeadlessException {
          // TODO Auto-generated constructor stub
          super();
          initialize();
     public DMToolz(String arg0) throws HeadlessException {
          super(arg0);
          // TODO Auto-generated constructor stub
          initialize();
      * This method initializes jButton
      * @return javax.swing.JButton
     private JButton getJButton() {
          if (jButton == null) {
               jButton = new JButton();
               jButton.setBounds(new Rectangle(723, 505, 103, 38));
               jButton.setText("UrcaMado'");
               jButton.addActionListener(new java.awt.event.ActionListener() {
                    public void actionPerformed(java.awt.event.ActionEvent e) {
/**************SCRIVERE QUI IL NOME DEL FILE CON L'IMMAGINE DA CARICARE*******************/
                         filename = "reference table player2.gif";
                       java.net.URL imgURL = DMToolz.class.getResource("images/"+filename);
                       BufferedImage img = null;
                       try {
                            img = ImageIO.read(imgURL);
                           w = img.getWidth();
                           h = img.getHeight();
                           System.out.println("*DM* Immagine letta - W:"+w+" H:"+h);
                        } catch (Exception ex) {System.out.println("*DM* Immagine non letta");}
                       JApplet a = new Apple();
                       a.setName(filename);
                       JFrame f = new JFrame ("UrcaBBestia!");
                       f.addWindowListener(new WindowAdapter() {
                           public void windowClosing(WindowEvent e) {System.exit(0);}
                       f.getContentPane().add(a);
                       f.setPreferredSize( new Dimension(w,h+30) );//30 � (circa) l'altezza della barra del titolo del frame
                           f.pack();
                         f.setVisible(true);
          return jButton;
public class Apple extends JApplet {
     private static final long serialVersionUID = 1L;
    final static Color bg = Color.white;
    final static Color fg = Color.black;
    final static Color red = Color.red;
    final static Color white = Color.white;
    public void init() {
        //Initialize drawing colors
        setBackground(bg);
        setForeground(fg);
    public void paint(Graphics g) {
        Graphics2D g2 = (Graphics2D) g;
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        try {
             String filename = this.getName(); //uso il nome dell'applet come riferimento al nome del file da caricare
             java.net.URL imgURL = DMToolz.class.getResource("images/"+filename);
             BufferedImage img = ImageIO.read(imgURL);
             if (img.equals(null)) {System.out.println("IMG null!");System.exit(0);}
            System.out.println("IMG letta");
            int w = img.getWidth();
            int h = img.getHeight();
            resize(w,h);
            g2.drawImage(img,
                        0,0,Color.LIGHT_GRAY,
                        null);// no ImageObserver
         } catch (Exception ex) {ex.printStackTrace();
                                      System.out.println("Immagine non letta.");System.exit(0);}
}//end classPlease never mind about some italian text, used as reminder....
Thanks in advance.

Read the Swing tutorial on "How to Use Labels" or "How to Use Icons" for working examples:
http://java.sun.com/docs/books/tutorial/uiswing/TOC.html
By the way you should never override the paint() method. Custom painting (not required in this case) is done by overriding the paintComponent(...) method in Swing. Overriding paint() is an old AWT trick.

Overlapping images in an applet

Hello,
I'm a Java beginner and I would like to write a small applet for a web page. My goal is the following:
The webpage has a background image. So far no problem.The applet should also show a small menu- which is also no greater problem.
Further on, every time the mouse cursor is rolling over a menu image, another image should be displayed overlapping the background image.
This is a problem, because I cannot remove the displayed image without
repainting the entire background image.
I am looking for a method, which can store a well defined image area so I can restore it later.
Thank you for any help !
Stephan

Put your images (rollover or whatever) on a new component - in swing you can use a JLabel - or, I'll assume awt here as its an applet, you can use a Panel. eg
MouseEntered()
inside your area
add(myPanel)
MouseExited()
your area
remove(myPanel)
In the panel you'll need to explicity call on java.awt.Graphics with
Graphics g = myPanel.getGraphics();

Using Java Advanced Imaging (JAI) in Applet

I'm trying to port a JAI user interface to an applet using Apache Tomcat. When I try to display an image in the applet I get an exception and I have no idea what the cause is. I've opened up security completely (temporarily) to ensure that I'm not getting an error due to an applet security issue. Consequently, I'm able to browse/open files from the client.
Here is the stack for the error I'm getting. Can anyone tell me what is causing this error? Thanks.
Java(TM) Plug-in: Version 1.4.1_01
Using JRE version 1.4.1_01 Java HotSpot(TM) Client VM
User home directory = C:\Documents and Settings\Administrator
Proxy Configuration: No proxy
c:   clear console window
f:   finalize objects on finalization queue
g:   garbage collect
h:   display this help message
l:   dump classloader list
m:   print memory usage
o:   trigger logging
p:   reload proxy configuration
q:   hide console
r:   reload policy configuration
s:   dump system properties
t:   dump thread list
v:   dump thread stack
x:   clear classloader cache
0-5: set trace level to <n>
java.lang.reflect.InvocationTargetException
     at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     at java.lang.reflect.Method.invoke(Method.java:324)
     at javax.media.jai.FactoryCache.invoke(FactoryCache.java:130)
     at javax.media.jai.OperationRegistry.invokeFactory(OperationRegistry.java:1669)
     at javax.media.jai.ThreadSafeOperationRegistry.invokeFactory(ThreadSafeOperationRegistry.java:481)
     at javax.media.jai.registry.RIFRegistry.create(RIFRegistry.java:340)
     at javax.media.jai.RenderedOp.createInstance(RenderedOp.java:805)
     at javax.media.jai.RenderedOp.createRendering(RenderedOp.java:853)
     at javax.media.jai.RenderedOp.getWidth(RenderedOp.java:2135)
     at com.abi.protmodule.GelDisplayData.getGelImage(GelDisplayData.java:558)
     at com.abi.protmodule.ScrollingGelPanel.<init>(ScrollingGelPanel.java:58)
     at com.abi.ris.web.applet.GelEditPanel.showGelImage(GelEditPanel.java:76)
     at com.abi.ris.web.applet.GelEditApplet.openGelJButton_actionPerformed(GelEditApplet.java:159)
     at com.abi.ris.web.applet.GelEditApplet.chooseFileJButton_actionPerformed(GelEditApplet.java:136)
     at com.abi.ris.web.applet.GelEditApplet$1.actionPerformed(GelEditApplet.java:73)
     at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1764)
     at javax.swing.AbstractButton$ForwardActionEvents.actionPerformed(AbstractButton.java:1817)
     at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:419)
     at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:257)
     at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:245)
     at java.awt.Component.processMouseEvent(Component.java:5093)
     at java.awt.Component.processEvent(Component.java:4890)
     at java.awt.Container.processEvent(Container.java:1566)
     at java.awt.Component.dispatchEventImpl(Component.java:3598)
     at java.awt.Container.dispatchEventImpl(Container.java:1623)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:3450)
     at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3165)
     at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3095)
     at java.awt.Container.dispatchEventImpl(Container.java:1609)
     at java.awt.Component.dispatchEvent(Component.java:3439)
     at java.awt.EventQueue.dispatchEvent(EventQueue.java:450)
     at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:197)
     at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:150)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:144)
     at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:136)
     at java.awt.EventDispatchThread.run(EventDispatchThread.java:99)
Caused by: java.lang.NoSuchFieldError: borders
     at com.sun.medialib.mlib.Image.initIDs(Native Method)
     at com.sun.medialib.mlib.Image.<clinit>(Image.java:2903)
     at com.sun.media.jai.mlib.MediaLibAccessor$1.run(MediaLibAccessor.java:223)
     at java.security.AccessController.doPrivileged(Native Method)
     at com.sun.media.jai.mlib.MediaLibAccessor.setUseMlib(MediaLibAccessor.java:220)
     at com.sun.media.jai.mlib.MediaLibAccessor.useMlib(MediaLibAccessor.java:185)
     at com.sun.media.jai.mlib.MediaLibAccessor.isMediaLibCompatible(MediaLibAccessor.java:391)
     at com.sun.media.jai.mlib.MediaLibAccessor.isMediaLibCompatible(MediaLibAccessor.java:314)
     at com.sun.media.jai.mlib.MlibScaleRIF.create(MlibScaleRIF.java:82)
     ... 39 more
Could not find mediaLib accelerator wrapper classes. Continuing in pure Java mode.

look at
http://forum.java.sun.com/thread.jsp?thread=290960&forum=20&message=1261471
and
http://forum.java.sun.com/thread.jsp?forum=20&thread=173410
It's something related with DLL libraries...

Pb displaying image in a canva with jpg format

I have an applet that displays images in a canva by pushing buttons. It works very well with gif image but bad with jpg image.
Coincidence or not ? I don't know.
What I know that I use the same method painting jpg or gif image
(first changing image name then calling mycanva.validate() and mycanva.repaint() and of course mycanva paint method contains g.drawimage(myimage,0,0,200,200,this) )
With jpg image what happens is the image is not completly painted (sometime half painted, sometime less than half painted) and if I do reload the browser the image is very well displayed...
has someone an idea ?
many thanks

try your app on another computer and see if it does the same thing. I had a very similar problem and it turned out to be my video driver was not driving my video properly. I changed/updated the video driver and my problems were totally solved.

Loading an image in an applet

I am trying to load and display an existing image to my applet and break the image up into segments to allow the pieces to be moved into their correct position. However it is only getting as far as cutting the image up but it does not complete loading the image. Below is the run() method im using to load it:
public void run()
        int i;
        MediaTracker trackset;              // Tracker for images
        Image WholeImage;                 // The whole image
                    Image ResizedImage;
        ImageFilter filter;
     // Determine the size of the applet
     r = getSize();
        // Load up the image
        if (getParameter("SRC") == null)
          Error("Image filename not defined.");
     WholeImage = getImage(getDocumentBase(), getParameter("SRC"));
     // Scale original image if needed
        // Make the image load completely and put the image
        // into the track set. Where it waits in paint() method.
        trackset = new MediaTracker(this);
        trackset.addImage(WholeImage, 1);
        // Mix up the puzzle
        System.out.println("Mixing puzzle.");
        PaintScreen = 2;
        repaint();
        try {
        Thread.sleep(100);
     } catch (InterruptedException e) {
        // Tell user of the wait for image loading
       //Trap trackset exceptions that track if the image
       //hasn't loaded properly and output to the user.
        PaintScreen = 0;
        repaint();
        try {
        Thread.sleep(100);
     } catch (InterruptedException e) {
        try {
           trackset.waitForID(1);
        } catch (InterruptedException e) {
           Error("Loading Interrupted!");
        // Check if image loaded up correctly
        //Where is image is held in the same directory
        //as the HTML file use getImage method to pass
        //getDocumentBase(), taking in the getParameter.
        if (WholeImage.getWidth(this) == -1)
             PaintScreen = 3;
             repaint();
             WholeImage = getImage(getDocumentBase(), getParameter("SRC"));
             trackset = new MediaTracker(this);
             trackset.addImage(WholeImage, 1);
             try {
                trackset.waitForID(1);
             } catch (InterruptedException e) {
                Error("Loading Interrupted!");
             if (WholeImage.getWidth(this) == -1)
                  PaintScreen = 4;
                  repaint();
                  stop();
                  return;
     // Resize picture if needed.
     int ResizeOption = integerFromString(getParameter("RESIZE"));
     if ((r.width != WholeImage.getWidth(this) ||
          r.height != WholeImage.getHeight(this)) &&
            ResizeOption != 0)
          if (ResizeOption == 2)
            ResizedImage =
              WholeImage.getScaledInstance(r.width, r.height - TOP_MARGIN,
                                 WholeImage.SCALE_FAST);
          else if (ResizeOption == 3)
            ResizedImage =
              WholeImage.getScaledInstance(r.width, r.height - TOP_MARGIN,
                                 WholeImage.SCALE_SMOOTH);
          else if (ResizeOption == 4)
            ResizedImage =
              WholeImage.getScaledInstance(r.width, r.height - TOP_MARGIN,
                                 WholeImage.SCALE_AREA_AVERAGING);
          else
            ResizedImage =
              WholeImage.getScaledInstance(r.width, r.height - TOP_MARGIN,
                                 WholeImage.SCALE_DEFAULT);
          trackset.addImage(ResizedImage, 2);
          PaintScreen = 5;
          repaint();
          try {
          Thread.sleep(100);
          } catch (InterruptedException e) {
          try {
          trackset.waitForID(2);
          } catch (InterruptedException e) {
          Error("Loading Interrupted!");
          WholeImage = ResizedImage;
        // Complete loading image. Start background loading other things
        // Also put image into the Graphics class
        // Split up main image into smaller images
        PaintScreen = 1;
        repaint();
        try {
           Thread.sleep(100);
        } catch (InterruptedException e){}
        piecewidth = WholeImage.getWidth(this) / piecesx;
        pieceheight = WholeImage.getHeight(this) / piecesy;
        System.out.println("Image has loaded. X=" +
                           WholeImage.getWidth(this) + " Y=" +
                           WholeImage.getHeight(this));
        imageset = new Image[totalpieces];
        for (i = 0; i < totalpieces; i++)
             filter = new CropImageFilter(GetPieceX(i) * piecewidth,
                                          GetPieceY(i) * pieceheight,
                                          piecewidth, pieceheight);
             imageset[i] = createImage(new
                                       FilteredImageSource(WholeImage.getSource(),
                                                           filter));
        // Set up the mouse listener
        System.out.println("Adding mouse listener.");
        addMouseListener(this);
        // Complete mixing the image parts
        System.out.println("Displaying puzzle.");
        PaintScreen = -1;
        repaint();
        while (end != null)
          try {
             Thread.sleep(100);
          } catch (InterruptedException e){}
     }Any help to where im going wrong would be much appreciated. Thanks!

ive seen this one many times and it dosent work for me! Shouldnt the second parameter of the getImage(...) method not include the 'http://..." part as that what getDocumentBase() is for, returning the URL of the page the applet is embedded in? I have tried using code like this and event getting a printout of the doc/code base into the console to make sure my images are in the right place (.gif images), and nothing's happening, null pointer every time!
{code}
Image image;
public void init() {
// Load image
image = getImage(getDocumentBase(), "http://hostname/image.gif");
public void paint(Graphics g) {
// Draw image
g.drawImage(image, 0, 0, this);
{code}
ps this code is from the site mentioned above
Edited by: Sir_Dori on Dec 8, 2008 8:37 AM

Help! Image in an applet

Hi, I'm having some trouble displaying an image in my applet. I drew something in MS Paint, saved it as a gif, and want to draw it in my applet. I have tried using two methods to load the image:
map = getImage(getCodeBase(),"cheese.gif");
and
Toolkit toolkit = getToolkit();
map =toolkit.createImage("cheese.gif");
System.out.println(map == null) prints false for both methods, meaning that (I assume) Java has found and knows what .gif I am requesting. I am drawing the image with
g.drawImage(map, 25, 150, this);
I have tried replacing "this" with "getContentPane()" as well, but that was fruitless.
I think am importing all the right classes, like java.awt.*.
My applet extends JApplet (I don't know this has anything to do with it). I would post the entire applet, but it is quite lengthy at the moment. Any help would be much appreciated, thanks in advance, and sorry about the long post. If anyone needs anymore information to help me, I will be glad to help.

Try this html and code:
<HTML>
    <HEAD>
        <TITLE></TITLE
    </HEAD>
    <BODY>
        <APPLET CODE="ImgApplet.class" width=500 height=500>
        <PARAM NAME=pic VALUE="ImgAppletPic.jpg">
        </APPLET>
    </BODY>
</HTML>
import java.awt.*;
import java.applet.*;
public class ImgApplet extends Applet {
    // var to store the pic;
    Image pic;
        // retrieving image;
        public void init() {
        pic = getImage(getCodeBase(), getParameter("pic"));
        public void paint(Graphics g) {
        g.drawImage(pic, 10, 10, this);
}

Displaying image from binary file

I am converting a image file(jpg) into a binary file and sending it. In the receiving side i got back the binary file and want to display the image in the applet or store the image in a file. while trying to do this i am not able to read the image from the buffer. Below here i have given my code.
File f= new File("image.jpg");
       FileInputStream fis = new FileInputStream(f);
       byte [] buffer = new byte[(int)f.length()];
       fis.read(buffer,0,buffer.length);
       fis.close();
      File f1 = new File("input.txt");
      int length = buffer.length;
      PrintWriter pw;
       pw = new PrintWriter(new BufferedWriter(new FileWriter(f1)));
      for(int i=0;i<length;i++)
          pw.println(Integer.toBinaryString(buffer));
pw.flush();
pw.close();
converting back to image i get error
File f1 = new File("inp.txt");
FileInputStream fis = new FileInputStream(f1);
buffer = new byte[(int)f1.length()];
fis.read(buffer,0,buffer.length);
Toolkit tk = Toolkit.getDefaultToolkit();
img = tk.createImage(buffer);
Reply me as early as possible.thanks.

You have two glaring problems here.
Firstly, you are writing via writers, which are intended for text and are probably corrupting your data. You want to be using a FileOutputStream.
Secondly, when reading in you are not checking the number of bytes read and may well not be fully populating your array. You want to change your reading code to something like this,
    buffer = new byte[(int)f1.length()];
    int read = 0;
    while (f1.available() > 0)
        read += fis.read(buffer, read, buffer.length - read);
    }

Displaying image from binary code

I am converting a image file(jpg) into a binary file and sending it. In the receiving side i get the binary file and want to display the image in the applet or store the image in a file. while trying to do this i am not able to read the image from the buffer. Below here i have given my code.
      File f= new File("image.jpg");
       FileInputStream fis = new FileInputStream(f);
       byte [] buffer = new byte[(int)f.length()];
       fis.read(buffer,0,buffer.length);
       fis.close();
      File f1 = new File("input.txt");
      int length = buffer.length;
      PrintWriter pw;
       pw = new PrintWriter(new BufferedWriter(new FileWriter(f1)));
      for(int i=0;i<length;i++)
          pw.println(Integer.toBinaryString(buffer));
pw.flush();
pw.close();
converting back to image i get error
File f1 = new File("inp.txt");
FileInputStream fis = new FileInputStream(f1);
buffer = new byte[(int)f1.length()];
fis.read(buffer,0,buffer.length);
Toolkit tk = Toolkit.getDefaultToolkit();
img = tk.createImage(buffer);
Reply me as early as possible.thanks.

You have two glaring problems here.
Firstly, you are writing via writers, which are intended for text and are probably corrupting your data. You want to be using a FileOutputStream.
Secondly, when reading in you are not checking the number of bytes read and may well not be fully populating your array. You want to change your reading code to something like this,
    buffer = new byte[(int)f1.length()];
    int read = 0;
    while (f1.available() > 0)
        read += fis.read(buffer, read, buffer.length - read);
    }

How to display image in JFrame

i am comfortable with displaying an image in applets ,but i am not able to display image in JFrames
i used Image img=getImage(getDocumentBase(),"sample.jpg");its displaying an error cant find symbol getDocumentBase()

It is a method of Applet. If you have a question of what methods
are available in a given class, the very first thing you should do is check the API:
http://java.sun.com/javase/6/docs/api/
Take a look at the code in reply #2: http://forum.java.sun.com/thread.jspa?threadID=5152350

Displaying images in an applet

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