Javax.Imageio Help Needed!

Basically, I found a site with a Javax.Imageio applet used to take screenshots with the click of a button.
The problem is that I know nothing about compiling Java, and I would like some assistance. This applet is a necessary addition to a webpage gaming site browser (Basically it's a framed page which goes to the different game's servers to play the game) so that the users can easily take screenshots of what's happening in the game.
The example script they have is located at:
http://schmidt.devlib.org/java/save-screenshot.html
But I need it to be compiled and changed a bit... The output only allows output of one file, which isn't good... It saves as out.png, and rewrites over it if you go to take a 2nd screenshot. The problem with this is that many users will need to take multiple screenshots. I need this example applet changed to do something like "screen1.png" then "screen2.png" then "screen3.png", and so on... If possible, I'd like it to save to Desktop/Screenshots/screen(x).png
Could I get a bit of assistance?
Thanks a lot, I appreciate any help I could get VERY much.
Please post the finished applet if you're able to help as a response to here, preferably in the format of a zip or rar with the files inside.

But I need it to be compiled and changed a bit... The output only allows output of one file, which isn't good...
It saves as out.png, and rewrites over it if you go to take a 2nd screenshot.
The problem with this is that many users will need to take multiple screenshots.
I need this example applet changed to do something like "screen1.png" then "screen2.png" then "screen3.png", and so on...
If possible, I'd like it to save to Desktop/Screenshots/screen(x).pngDid you even read the documentation on that web page, or the source code itself? From the statements you made, it would appear that you didn't read it very closely. If that directory already exists (Desktop/Screenshots), you don't have to change the code to save files as you want them (it won't auto-increment the number, though--auto-incrementing would require a change).
When you have downloaded and installed the Java SDK, re-read the web page, and give the program a shot.

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Thanks
Ram

Ram,
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Kevin

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===============
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_at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.getConnection(_QueryTagSupport.java:276_)
at org.apache.taglibs.standard.tag.common.sql.QueryTagSupport.doStartTag(_QueryTagSupport.java:159_)
at org.apache.jsp.test_jsp._jspx_meth_sql_005fquery_005f0(_test_jsp.java:113_)
at org.apache.jsp.test_jsp._jspService(_test_jsp.java:66_)
at org.apache.jasper.runtime.HttpJspBase.service(_HttpJspBase.java:70_)
at javax.servlet.http.HttpServlet.service(_HttpServlet.java:717_)
at org.apache.jasper.servlet.JspServletWrapper.service(_JspServletWrapper.java:374_)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(_JspServlet.java:342_)
at org.apache.jasper.servlet.JspServlet.service(_JspServlet.java:267_)
at javax.servlet.http.HttpServlet.service(_HttpServlet.java:717_)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(_ApplicationFilterChain.java:290_)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(_ApplicationFilterChain.java:206_)
at org.apache.catalina.core.StandardWrapperValve.invoke(_StandardWrapperValve.java:233_)
at org.apache.catalina.core.StandardContextValve.invoke(_StandardContextValve.java:191_)
at org.apache.catalina.core.StandardHostValve.invoke(_StandardHostValve.java:128_)
at org.apache.catalina.valves.ErrorReportValve.invoke(_ErrorReportValve.java:102_)
at org.apache.catalina.core.StandardEngineValve.invoke(_StandardEngineValve.java:109_)
at org.apache.catalina.connector.CoyoteAdapter.service(_CoyoteAdapter.java:286_)
at org.apache.coyote.http11.Http11Processor.process(_Http11Processor.java:845_)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(_Http11Protocol.java:583_)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(_JIoEndpoint.java:447_)
at java.lang.Thread.run(_Thread.java:619_)
{code}
So to overcome this error I had to place the <Resource> element in DBTest.xml under C:\Tomcat 6.0\conf\Catalina\localhost {color:#000000}and then it works fine. {color}{color:#ff0000}*Why is the context.xml file in META-INF not considered by Tomcat server using Sysdeo Plugin?*
*Thanks,*
*Deepa*{color}
{color}
Edited by: Deepa76 on May 26, 2009 9:32 PM

Exception in thread "main" javax.naming.NoInitialContextException: Need to

Hey,
I am exploring the technique 'JMS'. I found an sample code on the Internet (https://www.redhat.gl/docs/manuals/jboss/jboss-eap-4.2/doc/Server_Configuration_Guide/JMS_Examples-A_Point_To_Point_Example.html).
But unfortunately, by running the code on my local computer, I got an NoInitialContextException (Exception in thread "main" javax.naming.NoInitialContextException: Need to ...Application resource file: java.naming.factory.initial). After searching on the Internet, I discovered I need to configure some JNDI values. But, also after passing on the variables to the class by parameter (-Djava.naming.factory.initial=com.sun.enterprise.naming.SerialInitContextFactory), I still get the same error.
What have I forgotten? Hope someone can help. Thanks!
Tongue78.
public void setupPTP()
throws JMSException,
NamingException
InitialContext iniCtx = new InitialContext();
Object tmp = iniCtx.lookup("ConnectionFactory"); // exception occurs here..
QueueConnectionFactory qcf = (QueueConnectionFactory) tmp;
conn = qcf.createQueueConnection();
que = (Queue) iniCtx.lookup("queue/testQueue");
session = conn.createQueueSession(false,
QueueSession.AUTO_ACKNOWLEDGE);
conn.start();
....

Refer to the Sun App Server documentation.
http://docs.sun.com/source/819-0079/dgacc.htmlIt lists down the steps you need to follow.

Javax.imageio.ImageIO

Hello,
I have recently installed Fedora Core 2 to a dell dimension 8100 and I am trying to compile the program and get this error each time javac runs. error:
Class or interface `javax.imageio.ImageIO' not found in import.
import javax.imageio.ImageIO;
^
Is linux installed with an sdk native to the system? If so how do I uninstall it? Would it conflict if I installed another Java SDK I found that the package jdk 1.5.0_05fcs was installed so I did a rpm -e command on it and reinstalled a fresh copy but this did not help. Thanks!-signol

Ok, I got this error
gcj: unrecognized option `-version'
gcj: no input files
I originally put j2sdk 1.4.2_09 on thinking there was no java to begin with, could this cause some of the errors? Also how would i go about uninstalling the package?-Signol

Using javax.imageio in JSP

Hi
I have a simple code snippet that I use to read in JPG/GIF image from a file and create a new image that is upside down . Here is my snippet.
//create upside down image
try {
String imgPath = "\\images\\AINCC.gif";
File fImg = new File(imgPath);
BufferedImage imgREG = ImageIO.read(fImg);
int iW = imgREG.getWidth(null);
int iH = imgREG.getHeight(null);
// Flip the image vertically and horizontally (equivalent to rotating the image 180 degrees)
AffineTransform tx = AffineTransform.getScaleInstance(-1.0,-1.0);
tx.translate(-iW, -iH);
//tx.scale(0.8,0.8);
AffineTransformOp op = new AffineTransformOp(tx, AffineTransformOp.TYPE_NEAREST_NEIGHBOR);
BufferedImage imgUSD = op.filter(imgREG, null);
// write flipped image to a file
File fUSD = new File("images\\USD_image.tmp");
ImageIO.write(imgUSD,"jpg",fUSD);
catch (Exception e) {
e.printStackTrace();
If I use this in a stand alone Java app it works fine but it will not work from the JSP page....
I have updated my server.policy file to give /images directory read, write, delete priviledges and I tried all the variations of the path (relative, absolute, direct....)...
I get the following error from the server log:
[#|2004-05-17T13:47:56.173-0400|WARNING|sun-appserver-pe8.0|javax.enterprise.system.stream.err|_ThreadID=11;|
javax.imageio.IIOException: Can't read input file!
at javax.imageio.ImageIO.read(ImageIO.java:1263)
at org.apache.jsp.ecards.mailcard_jsp._jspService(mailcard_jsp.java:125)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:141)
Can someone tell me what am I missing....
My JSP page is mailcard.jsp and images are under it in the images subdirectory....
Thanks
Amir

Hi,
Replace the following lines:
try{
String imgPath = "\\images\\AINCC.gif";
with
<%String contextPath = request.getContextPath();%>
try{
String imgPath = <%=contextPath%> + "\\images\\AINCC.gif";
You may also need to set the web application context root.
Regards,
bazooka.

ImageIO - javax.imageio.IIOException: Can't get input stream from URL

Hi,
I'm developing a program which accesses a given URL of an image and saves it to a file. However when I try this I get the following error:
javax.imageio.IIOException: Can't get input stream from URL!
     at javax.imageio.ImageIO.read(Unknown Source)
     at ImageSave.main(ImageSave.java:12)
Caused by: java.net.ConnectException: Connection timed out: connect
     at java.net.PlainSocketImpl.socketConnect(Native Method)
     at java.net.PlainSocketImpl.doConnect(Unknown Source)
     at java.net.PlainSocketImpl.connectToAddress(Unknown Source)
     at java.net.PlainSocketImpl.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at java.net.Socket.connect(Unknown Source)
     at sun.net.NetworkClient.doConnect(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.openServer(Unknown Source)
     at sun.net.www.http.HttpClient.<init>(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.http.HttpClient.New(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.plainConnect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
     at java.net.URL.openStream(Unknown Source)
     ... 2 moreThe internet connection I am using uses a proxy server and I think this is where the problem lies. I'm using Eclipse version 3.3 and I've tried changing the network settings to use the proxy's hostname and port but this still isn't working. I've also tried using System.setProperty("http.proxyHost", "hostname") and System.setProperty("http.proxyPort", "port") but that hasn't worked for me either. Below is my class in full.
import java.awt.image.*;
import javax.imageio.*;
import java.io.*;
import java.net.*;
public class ImageSave
     public static void main(String args[])
          try {
               URL url = new URL("http://www.example.com/image.jpg");
               BufferedImage image = ImageIO.read(url);
               ImageIO.write(image, "JPG", new File("image.jpg"));
          catch (Exception e) {
               e.printStackTrace();
}The error occurs with the line: BufferedImage image = ImageIO.read(url);
I have tried looking for a way to change how this specific method accesses the internet (e.g: a Proxy parameter with URLConnection) but there doesn't seem to be any.
Any help or suggestions would be greatly appreciated.
-Robert

Ah, that worked fine. I had thought of using that earlier but I was under the impression that the input stream would be HTML rather than an actual image. Not sure why.. Anyway, thanks very much for your help!
Here is the new code with your suggested revisions and a URLConnection to get the input stream:
import java.awt.image.*;
import javax.imageio.*;
import java.io.*;
import java.net.*;
public class ImageSave
    public static void main(String args[])
        try {
             // This is where you'd define the proxy's host name and port.
             SocketAddress address = new InetSocketAddress(hostName, port);
             // Create an HTTP Proxy using the above SocketAddress.
             Proxy proxy = new Proxy(Proxy.Type.HTTP, address);
             URL url = new URL("www.example.com/image.jpg");
             // Open a connection to the URL using the proxy information.
             URLConnection conn = url.openConnection(proxy);
             InputStream inStream = conn.getInputStream();
             // BufferedImage image = ImageIO.read(url);
             // Use the InputStream flavor of ImageIO.read() instead.
             BufferedImage image = ImageIO.read(inStream);
             ImageIO.write(image, "JPG", new File("image.jpg"));
        catch (Exception e) {
             e.printStackTrace();
}Edited by: Ragnarob on Apr 21, 2009 2:49 AM

Adding JTable on an image..............??help need.....edited

i am using JFame
on JFrame i hav added JTabbedpane....
on one of the tab i hav added image on whole background....
on that tab i hav added JTable....
but when i add JTable on that tab .....instead of adding table on that image...it add image on background with no image
that no color part shoud be covered with part of image added on a tab
and also i want to position (x,y) of JTable on tab.....
so i hav used gridLayout so that it looks better....but that not i want.....
here is the code.... check search tab
//project.java
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
class tdsgui{
JFrame f,pass;
JTabbedPane jtp = new JTabbedPane();
JApplet obj=new JApplet();
JMenuBar mb=new JMenuBar();
public tdsgui(){
f=new JFrame("TELEPHONE DIRECTORY SYSTEM");
JMenu m1=new JMenu("File");
JMenu m2=new JMenu("About");
JMenu m3=new JMenu("Help");
mb.add(m1);
mb.add(m2);
mb.add(m3);
JMenuItem mi1=new JMenuItem("Save");
JMenuItem mi2=new JMenuItem("Exit");
JMenuItem mi3=new JMenuItem("save as");
mi3.setVisible(true);
m1.add(mi1);
m1.add(mi3);
m1.add(mi2);
public void launch(){
jtp.addTab(" REGISTRATION ",new registerpanel());
jtp.addTab(" MODIFY ",new updatepanel());
jtp.addTab(" SEARCH ", new searchpanel());
f.add(mb);
f.setJMenuBar(mb);
f.add(jtp);
f.setSize(500,600);
f.setVisible(true);
public class project{
public static void main(String args[]){
tdsgui next=new tdsgui();
next.launch();
class registerpanel extends JPanel{
public registerpanel(){
class updatepanel extends JPanel{
public updatepanel(){
class searchpanel extends JPanel{
public searchpanel(){
Icon icon = new ImageIcon("Sunset.jpg");
JLabel label = new JLabel(icon);
add(label);
this.setLayout(new GridLayout(2,0));
final String[] colHeads = { "Name", "Phone", "Fax" };
final String[][] data = {
{ "Gail", "4567", "8675" },
{ "Ken", "7566", "5555" },
{ "Viviane", "5634", "5887" },
{ "Melanie", "7345", "9222" },
{ "Anne", "1237", "3333" },
{ "John", "5656", "3144" }
// Create the table
JTable table = new JTable(data, colHeads);
JTableHeader header = table.getTableHeader();
table.setRowHeight(20);
TableColumn column = table.getColumnModel().getColumn(0);
table.setCellSelectionEnabled(true);
table.getTableHeader().setPreferredSize(new Dimension(0,30));
table.setFont(new Font("Dialog", Font.BOLD, 15));
table.setBackground(Color.green);
header.setFont(new Font("Courier",Font.BOLD,25));
header.setBackground(Color.yellow);
//label.add(table,BorderLayout.CENTER);
// Add table to a scroll pane
int v = ScrollPaneConstants.VERTICAL_SCROLLBAR_AS_NEEDED;
int h = ScrollPaneConstants.HORIZONTAL_SCROLLBAR_AS_NEEDED;
JScrollPane jsp = new JScrollPane(table, v, h);
// Add scroll pane to the content pane
this.add(jsp, BorderLayout.SOUTH);
add image i ur system....make changes on searchpanel class
thanks in advance...

on one of the tab i hav added image on whole background....no you haven't - you've added a JLabel to a GridLayout JPanel
I have no idea what you're really trying to do, but here's a tab with image background and transparent table (except for the header)
import java.awt.*;
import javax.swing.*;
import javax.swing.table.*;
class tdsgui{
JFrame f;
JTabbedPane jtp = new JTabbedPane();
public tdsgui(){
f=new JFrame("TELEPHONE DIRECTORY SYSTEM");
public void launch(){
jtp.addTab(" REGISTRATION ",new registerpanel());
jtp.addTab(" MODIFY ",new updatepanel());
jtp.addTab(" SEARCH ", new searchpanel());
f.add(jtp);
f.setSize(500,600);
f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
f.setVisible(true);
class project{
public static void main(String args[]){
tdsgui next=new tdsgui();
next.launch();
class registerpanel extends JPanel{
public registerpanel(){
class updatepanel extends JPanel{
public updatepanel(){
class searchpanel extends JPanel{
Image img;
public searchpanel(){
try{img = javax.imageio.ImageIO.read(new java.net.URL(getClass().getResource("Test.gif"), "Test.gif"));}
catch(Exception e){}//do nothing - handled in paintComponent
this.setLayout(new GridLayout(2,0));
final String[] colHeads = { "Name", "Phone", "Fax" };
final String[][] data = {
{ "Gail", "4567", "8675" },
{ "Ken", "7566", "5555" },
{ "Viviane", "5634", "5887" },
{ "Melanie", "7345", "9222" },
{ "Anne", "1237", "3333" },
{ "John", "5656", "3144" }
JTable table = new JTable(data, colHeads);
table.setOpaque(false);
table.setBackground(new Color(0,0,0,0));
JScrollPane jsp = new JScrollPane(table);
jsp.setOpaque(false);
jsp.getViewport().setOpaque(false);
this.add(jsp);
public void paintComponent(Graphics g){
super.paintComponent(g);
if(img != null) g.drawImage(img,0,0,this.getWidth(), this.getHeight(),this);
}

Problems with javax.imageio.ImageIO (cannot be resolved) *Urgent*

I was trying to import javax.imageio.ImageIO into my project but it cannot work... I am using Websphere Application 5.1.2 and using JDK 1.4.2_07... I try to import external jar containing javax.image but it still can't solve my problem... So can anyone help me... Thank alot...

There is no exception, the javax.imageio.ImageIO.read(InputStream input) method simply returns null, indicating that the stream can't be decoded with any of the registered ImageReaders.
BufferedImage bi = javax.imageio.ImageIO.read(new ByteArrayInputStream(wr2.getData()))
wr2 is of a class that I have written myself, and the method getData() returns a byte[] array consisting of the bytes previously read from the .gif-file...
there is nothing wrong with the data stored in the byte[] array, I have even compared it to the original file byte by byte... and it's all the same.
this works though:
BufferedImage bi = javax.imageio.ImageIO.read(new FileInputStream("img/iconOnlineDark.gif"))
Strange problem, in my opinion... but I'm not an expert in streams... so it might not be as strange as it seems to me...? Anyway, I must find a solution to this.
/erik

JCmboBox setSelectedIndex help needed !!!!!!!!!!!!

hi,
I hope it's a trivial question but I am not able to solve it so need your help plz. I have a demo program if you run it you will see what I mean. Actually I am adding items to my JComboBox dynamically. My problem is that if I add the items with the same name and then explicitly set them selected my first item with same name is always highlighted and selected even though I say to select the last item which I add. But when I pull down the comboBox my first item with the same name is selected and highlighted not the last one. Please run the program and see. How can I solve this problem help needed.
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class ComboBoxDemo extends JPanel {
JButton picture;
public ComboBoxDemo() {
String[] petStrings = { "Bird", "Cat", "Dog", "Rabbit", "Pig" };
// Create the combo box, select the pig
final JComboBox petList = new JComboBox(petStrings);
picture = new JButton("ADD");
picture.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
petList.addItem("TEST ");
int nodeTotal = petList.getItemCount();
petList.setSelectedIndex(nodeTotal-1);
setLayout(new BorderLayout());
add(petList, BorderLayout.NORTH);
add(picture, BorderLayout.SOUTH);
setBorder(BorderFactory.createEmptyBorder(20,20,20,20));
public static void main(String s[]) {
JFrame frame = new JFrame("ComboBoxDemo");
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {System.exit(0);}
frame.setContentPane(new ComboBoxDemo());
frame.pack();
frame.setVisible(true);
I want to select the last item I add even if there exists an item with same name.
Any help is greatly appreciated.
Thanks.

never mind I got the answer.
Tnaks

Javax.Imageio Help Needed!

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