Help with an applet

How can I make to refresh the HTML page where I have the applet when I press a button?
Thanks.

<form name="myForm" action="Current_Applet_Name" method="Post">
<input type=submit name="myButton" value="Refresh">
</form>
If your button is in the form as shown above and the form action is the Applet you want to refresh, then when you click on the button it will submit your form which will refresh the HTML page that has your Applet.
Hope this helps!!
Taji

Similar Messages

Need help with advanced applet

I need help with designing an applet as follows. Can someone give me a basic layout of code and material so i can fill in the rest or at leats give me some hints so i can get started since i am like no good at applets.
Design and implement an applet that graphically displays the processing
of a selection sort. Use bars of various heights to represent
the values being sorted. Display the set of bars after each swap. Put
a delay in the processing of the sort to give the human observer a
chance to see how the order of the values changes.
heres a website that does something similar
http://www.cs.ubc.ca/spider/harrison/Java/sorting-demo.html

elasolova wrote:
i will not help you this time. but if you buy me a candy maybe i can reconsider the issue. :PI suggest an all-day sucker.

Plz help with deploying applet that uses SSL

Hi, maybe this is not the adecuate forum but ive already tried in others and i got no answer.
Im trying to use a certificate with my applet ( tha sends a lot of info to the server and also connects to another hibernate db) but im getting this error:
Server side:
username is: Panda
Registered the SSLServerSocket on port 6969
Listening ....
---- Got a connection from a client
     this is an unknown client
!!!!!!Error in reading or writing from/to the client:
javax.net.ssl.SSLException: Connection has been shutdown: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkEOF(Unknown Source)
     at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source)
     at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(Unknown Source)
     at sun.nio.cs.StreamDecoder$CharsetSD.implRead(Unknown Source)
     at sun.nio.cs.StreamDecoder.read(Unknown Source)
     at java.io.InputStreamReader.read(Unknown Source)
     at java.io.BufferedReader.fill(Unknown Source)
     at java.io.BufferedReader.readLine(Unknown Source)
     at java.io.BufferedReader.readLine(Unknown Source)
     at PaqueteServidor.Server$handleRequest.run(Server.java:130)
Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
     at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
     at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.getSession(Unknown Source)
     at PaqueteServidor.Server.printClientCerts(Server.java:47)
     at PaqueteServidor.Server.run(Server.java:100)
javax.net.ssl.SSLException: Connection has been shutdown: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.checkEOF(Unknown Source)
     at com.sun.net.ssl.internal.ssl.AppInputStream.read(Unknown Source)
     at sun.nio.cs.StreamDecoder$CharsetSD.readBytes(Unknown Source)
     at sun.nio.cs.StreamDecoder$CharsetSD.implRead(Unknown Source)
     at sun.nio.cs.StreamDecoder.read(Unknown Source)
     at java.io.InputStreamReader.read(Unknown Source)
     at java.io.BufferedReader.fill(Unknown Source)
     at java.io.BufferedReader.readLine(Unknown Source)
     at java.io.BufferedReader.readLine(Unknown Source)
     at PaqueteServidor.Server$handleRequest.run(Server.java:130)
Caused by: javax.net.ssl.SSLHandshakeException: Received fatal alert: certificate_unknown
     at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
     at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.recvAlert(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.getSession(Unknown Source)
     at PaqueteServidor.Server.printClientCerts(Server.java:47)
     at PaqueteServidor.Server.run(Server.java:100)
Client side:
javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     at com.sun.net.ssl.internal.ssl.Alerts.getSSLException(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.fatal(Unknown Source)
     at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)
     at com.sun.net.ssl.internal.ssl.Handshaker.fatalSE(Unknown Source)
     at com.sun.net.ssl.internal.ssl.ClientHandshaker.serverCertificate(Unknown Source)
     at com.sun.net.ssl.internal.ssl.ClientHandshaker.processMessage(Unknown Source)
     at com.sun.net.ssl.internal.ssl.Handshaker.processLoop(Unknown Source)
     at com.sun.net.ssl.internal.ssl.Handshaker.process_record(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.readRecord(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.performInitialHandshake(Unknown Source)
     at com.sun.net.ssl.internal.ssl.SSLSocketImpl.startHandshake(Unknown Source)
     at sun.net.www.protocol.https.HttpsClient.afterConnect(Unknown Source)
     at sun.net.www.protocol.https.AbstractDelegateHttpsURLConnection.connect(Unknown Source)
     at sun.net.www.protocol.http.HttpURLConnection.getInputStream(Unknown Source)
     at sun.net.www.protocol.https.HttpsURLConnectionImpl.getInputStream(Unknown Source)
     at Interfaz.InterfazMovil.init(InterfazMovil.java:89)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     at sun.security.validator.PKIXValidator.doBuild(Unknown Source)
     at sun.security.validator.PKIXValidator.engineValidate(Unknown Source)
     at sun.security.validator.Validator.validate(Unknown Source)
     at com.sun.net.ssl.internal.ssl.X509TrustManagerImpl.checkServerTrusted(Unknown Source)
     at com.sun.net.ssl.internal.ssl.JsseX509TrustManager.checkServerTrusted(Unknown Source)
     ... 14 more
Caused by: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
     at sun.security.provider.certpath.SunCertPathBuilder.engineBuild(Unknown Source)
     at java.security.cert.CertPathBuilder.build(Unknown Source)
     ... 19 more
19:40:34,444 INFO Environment:464 - Hibernate 3.0.5
19:40:34,444 INFO Environment:477 - hibernate.properties not found
19:40:34,444 INFO Environment:510 - using CGLIB reflection optimizer
19:40:34,454 INFO Environment:540 - using JDK 1.4 java.sql.Timestamp handling
19:40:34,645 INFO Configuration:1110 - configuring from resource: /bd/hibernate/hibernate.cfg.xml
19:40:34,645 INFO Configuration:1081 - Configuration resource: /bd/hibernate/hibernate.cfg.xml
19:40:35,045 ERROR XMLHelper:59 - Error parsing XML: /bd/hibernate/hibernate.cfg.xml(21) The content of elements must consist of well-formed character data or markup.
19:40:35,045 ERROR Configuration:1172 - problem parsing configuration/bd/hibernate/hibernate.cfg.xml
org.dom4j.DocumentException: Error on line 21 of document : The content of elements must consist of well-formed character data or markup. Nested exception: The content of elements must consist of well-formed character data or markup.
     at org.dom4j.io.SAXReader.read(SAXReader.java:482)
     at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1168)
     at org.hibernate.cfg.Configuration.configure(Configuration.java:1112)
     at bd.hibernate.HibernateUtil.currentSession(HibernateUtil.java:51)
     at bd.controlador.CLetrero.ListarLetreros(CLetrero.java:45)
     at Interfaz.InterfazMovil.init(InterfazMovil.java:126)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Nested exception:
org.xml.sax.SAXParseException: The content of elements must consist of well-formed character data or markup.
     at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source)
     at org.dom4j.io.SAXReader.read(SAXReader.java:465)
     at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1168)
     at org.hibernate.cfg.Configuration.configure(Configuration.java:1112)
     at bd.hibernate.HibernateUtil.currentSession(HibernateUtil.java:51)
     at bd.controlador.CLetrero.ListarLetreros(CLetrero.java:45)
     at Interfaz.InterfazMovil.init(InterfazMovil.java:126)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
%%%% Error Creating SessionFactory %%%%
org.hibernate.HibernateException: problem parsing configuration/bd/hibernate/hibernate.cfg.xml
     at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1173)
     at org.hibernate.cfg.Configuration.configure(Configuration.java:1112)
     at bd.hibernate.HibernateUtil.currentSession(HibernateUtil.java:51)
     at bd.controlador.CLetrero.ListarLetreros(CLetrero.java:45)
     at Interfaz.InterfazMovil.init(InterfazMovil.java:126)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Caused by: org.dom4j.DocumentException: Error on line 21 of document : The content of elements must consist of well-formed character data or markup. Nested exception: The content of elements must consist of well-formed character data or markup.
     at org.dom4j.io.SAXReader.read(SAXReader.java:482)
     at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1168)
     ... 6 more
java.lang.NullPointerException
     at bd.hibernate.HibernateUtil.currentSession(HibernateUtil.java:59)
     at bd.controlador.CLetrero.ListarLetreros(CLetrero.java:45)
     at Interfaz.InterfazMovil.init(InterfazMovil.java:126)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)
Plz help and thx in advance.

I know I didn't get round to replying but no need to post it so many times.
http://forum.java.sun.com/thread.jspa?threadID=666870
http://forum.java.sun.com/profile.jspa?userID=543817
http://forum.java.sun.com/thread.jspa?threadID=669965
http://forum.java.sun.com/profile.jspa?userID=543817
http://forum.java.sun.com/thread.jspa?threadID=669975
http://forum.java.sun.com/thread.jspa?threadID=669973
Could it be that the server and client need to open different keystores?
http://forums.java.sun.com/thread.jspa?threadID=573918&messageID=3272683
reply 7
My example given before should work on different machines, try to export the server key and import it into the
client keystore. Export the client key and import in the server keystore if you want the server to authenticate
the client.
http://forum.java.sun.com/thread.jspa?threadID=666870
reply 4
Check the method getSSLSocketFactory in the applet, that will open a keystore for you.

Help with java applets

Ok i know i haven't read the applet tutorial or had much experience with applets but just hear me out and see if you can help me.
BACKGROUND
Ok...so i have previously viewed an applet on windows viewing an html file on my computer. I am trying to view just the most simple applet (helloworld) on linux. I'm using Ubuntu linux, the latest version as of February 23, 2006.I created an applet file and an html file in the same directory with the html file having an <applet> tag in it linking to the HelloWorldApp. I have tried viewing the html file and the java applet won't load. Everything other than the applet worked and I'm just stuck.
So my plea is would somebody please just paste the bare minimum html file and applet file that you can see an applet with? I want to learn about applets and will do the tutorial but I would really like to just see one.
Please help,
A frustrated applet noob
p.s.
According to java.com I have installed JRE 5.0 and i have compiled a java application so I'm pretty sure I have successfully installed JDK 5.0.

Bob, what web browser are you using?
Make sure that the browser supports Java applets.
If you want just to debug your applet try appletviewer utility
from JDK first.

Help with simple applet - dragging box

Hi I need help with a simple applet concept.
I have a picture drawn in the background, but I need to draw a square and resize it when I drag.
So with the picture in the background I click, drag the mouse, and it draws a rectangle from the starting point to where the mouse is while the mouse is clicked.
The only problem is I can't figure out how to do this without redrawing the whole picture. If I don't repaint, it just keeps stretching around rectangles and leaving them there.
I don't really need exact code, just an idea on how to do this without repainting the background every time the mouse is moved (because the picture in the background is complicated to draw and takes like a second).
Thanks
[nvm, found out about xormode]
Edited by: BugMenOTdhzj on Nov 30, 2009 4:47 PM

BugMenOTdhzj wrote:
..the picture in the background is complicated to draw and takes like a second).Paint the 'picture in the background' to a BufferedImage, then when it comes to paint()/paintComponent(), draw the BI to the Graphics object (clipped, if necessary (1)), then draw the rectangle to the Graphics object. This would be further optimised at time of rendering, by drawing both the 'picture in the background' BI and rectangle to a second BI, and finally writing that 2nd BI to the Graphics object.
1) There are potentially other improvements that can be made, particularly with clipping, but I suspect if you try as I suggested, the rendering will be very quick and responsive. I have 40 FPS sound trace animations that do a great deal more on each call to paintComponent(), before bursting the final BI to screen.

Need help with Java applet, might need NetBeans URL

I posted the below question. It was never answered, only I was told to post to the NetBeans help forum. Yet I don't see any such forum on this site. Can someone tell me where the NetBeans help forum is located (URL).
Here is my original question:
I have some Java source code from a book that I want to compile. The name of the file is HashTest.java. In order to compile and run this Java program I created a project in the NetBeans IDE named javaapplication16, and I created a class named HashTest. Once the project was created, I cut and pasted the below source code into my java file that was default created for HashTest.java.
Now I can compile and build the project with no errors, but when I try and run it, I get a dialog box that says the following below (Ignore the [...])
[..................Dialog Box......................................]
Hash Test class wasn't found in JavaApplication16 project
Select the main class:
<No main classes found>
[..................Dialog Box......................................]
Does anyone know what the problem is here? Why won't the project run?
// Here is the source code: *****************************************************************************************************
import java.applet.*;
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.util.*;
public class HashTest extends Applet implements ItemListener
// public static void main(String[] args) {
// Hashtable to add tile images
private Hashtable imageTable;
// a Choice of the various tile images
private Choice selections;
// assume tiles will have the same width and height; this represents
// both a tile's width and height
private int imageSize;
// filename description of our images
private final String[] filenames = { "cement.gif", "dirt.gif", "grass.gif",
"pebbles.gif", "stone.gif", "water.gif" };
// initializes the Applet
public void init()
int n = filenames.length;
// create a new Hashtable with n members
imageTable = new Hashtable(n);
// create the Choice
selections = new Choice();
// create a Panel to add our choice at the bottom of the window
Panel p = new Panel();
p.add(selections, BorderLayout.SOUTH);
p.setBackground(Color.RED);
// add the Choice to the applet and register the ItemListener
setLayout(new BorderLayout());
add(p, BorderLayout.SOUTH);
selections.addItemListener(this);
// allocate memory for the images and load 'em in
for(int i = 0; i < n; i++)
Image img = getImage(getCodeBase(), filenames);
while(img.getWidth(this) < 0);
// add the image to the Hashtable and the Choice
imageTable.put(filenames[i], img);
selections.add(filenames[i]);
// set the imageSize field
if(i == 0)
imageSize = img.getWidth(this);
} // init
// tiles the currently selected tile image within the Applet
public void paint(Graphics g)
// cast the sent Graphics context to get a usable Graphics2D object
Graphics2D g2d = (Graphics2D)g;
// save the Applet's width and height
int width = getSize().width;
int height = getSize().height;
// create an AffineTransform to place tile images
AffineTransform at = new AffineTransform();
// get the currently selected tile image
Image currImage = (Image)imageTable.get(selections.getSelectedItem());
// tile the image throughout the Applet
int y = 0;
while(y < height)
int x = 0;
while(x < width)
at.setToTranslation(x, y);
// draw the image
g2d.drawImage(currImage, at, this);
x += imageSize;
y += imageSize;
} // paint
// called when the tile image Choice is changed
public void itemStateChanged(ItemEvent e)
// our drop box has changed-- redraw the scene
repaint();
} // HashTest

BigDaddyLoveHandles wrote:
h1. {color:red}MULTIPOST: [http://forums.sun.com/thread.jspa?threadID=5358840&messageID=10564025]{color}
That wasn't attention-grabbing enough apparantly. Let's try it again.
h1. {color:red}MULTIPOST: [http://forums.sun.com/thread.jspa?threadID=5358840&messageID=10564025]{color}
h1. {color:red}MULTIPOST: [http://forums.sun.com/thread.jspa?threadID=5358840&messageID=10564025]{color}
h1. {color:red}MULTIPOST: [http://forums.sun.com/thread.jspa?threadID=5358840&messageID=10564025]{color}
h1. {color:red}MULTIPOST: [http://forums.sun.com/thread.jspa?threadID=5358840&messageID=10564025]{color}
h1. {color:red}MULTIPOST: [http://forums.sun.com/thread.jspa?threadID=5358840&messageID=10564025]{color}

Help with refreshing applet

If I recompile my applet and try to restart it in Netscape the changes do not take hold. I've tried refreshing and emptying the cache and even setting the cache to 0, but it won't run the new version of the program. The only way I can get it to work is to quit Netscape entirely, restart it, and start the Java program again. Why is this? And is there a way to get around this?
And there is a a second related problem I have. My applet calls a CGI program and recieves html text in reply. This HTML text I display in a JEditorPane. The first time I run the program it displays it nicely, but everytime after that it displays the HTML commands mixed in with the text, i.e. "<TABLE><TR><TD>text" instead of a table.
Does anyone know what causes this or how to prevent it?

Thanks for the help again. I read the API myself and tried adding the new line, but it had no affect. I tried this:
ResultsDisplay.getEditorKit().createDefaultDocument();
ResultsDisplay.setContentType("text/html");
ResultsDisplay.setText(inputStore.toString());and even this:
ResultsDisplay = new javax.swing.JEditorPane();
ResultsDisplay.getEditorKit().createDefaultDocument();
ResultsDisplay.setContentType("text/html");
ResultsDisplay.setText(inputStore.toString());But neither solution fixed it.

Need help with an applet that will only run as an application

I am working on a slide show applet. The problem is that is won't run as an applet. I added a quite standard main method to stick the applet in a JFrame and this worked. I believe that the problem lies in how I am trying to open the files.
here are two of the methods that I believe contain part of the problem
     private void showImage( String image_name )
          image_file = Toolkit.getDefaultToolkit().getImage( image_name );
          display_image.loadImage( image_file );
          repaint();
     private void setFileFolder( String folder )
          file_finder = new File( folder );
          file_results = file_finder.list();
     }image_file is an object of class Image, display_image is an object of class ImageComponent (extends JComponent to draw an image), and file_finder and file_results are both objects of class File
I would greatly appreciate it if some one would help me with this.
The full source can be found at http://www.geocities.com/enchantedforest/3688/ImSP.zip

Ok. I got the image loading to work.
Now how do I fix the second method shown in my first post? It is needed to find all of the images in one specific folder so that the slide show can run.

Help with simple applet code

i wanted to write a applet that would display a image,(this is my first program) i wrote the code shown below,but image space is emptly when i load it up with any browser.....i ran the code in netbeans,,, i am a novice, any piece of advice also wud be helpful.........
<applet code="imagereadingapplet" width=500 height=500>
<param name="img" value="kollam.gif">
</applet>
import java.applet.*;
import java.awt.*;
* @author raman
public class imagereadingapplet extends Applet {
* Initialization method that will be called after the applet is loaded
* into the browser.
Image img;
@Override
public void init() {
img = getImage(getDocumentBase(),"kollam.gif");
@Override
public void paint(Graphics g){
g.drawImage(img,0,0,this);
// TODO overwrite start(), stop() and destroy() methods
}

Hi,
First advice imagereadingapplet -> ImageReadingApplet (Java name convention).
Second image file name is hard coded so you don't have to set param for the applet (Best would be not to hard code this name).
Finally maybe the most interesting, It seems that image kollam.gif is not at root folder.
I don't really know netbeans but your image must be in bin folder, the same as imagereadingapplet.class.

Need help with my applet. I am new to applets...Please help..please...

Here is one method from the class:
public void update(Graphics g) {
          Dimension d = size();
               int w = sky.getWidth(this);
          int h = sky.getHeight(this);
               // If we've loaded the moving image, draw it.
          if ((w > 0) && (h > 0)) {
               g.drawImage(sky, ((frameNumber*12) % (w+d.width))-w,
     (d.height - h), this);
               g.drawImage(bird,x,y,this);
Okay. The applet runs. However, when the sky moves across as the background, as soon as it shifts completely off the view, it gets all wierd and blurry. Then, when it shifts in again, it goes back to normal. It's supposed to go from left to right, start again at the left again, and then go right again...going only right...How do I stop it from getting all wierd?
Also, the bird image gets all staticky...all I do is increment/decrement the x and y (private int variables) in the keyPressed method (with a multi-way if). I read somewhere the solution to this problem is double-buffering...which I don't understand how to implement with my images....Sky and bird are both GIFs...
Edited by: LinksApprentice on May 17, 2008 7:49 AM

If you don't get a great answer (or even if you do) a great resource that I suggest you read is an article entitled [How To Ask Questions The Smart Way|http://www.catb.org/~esr/faqs/smart-questions.html] . It will tell you how to formulate your questions so that the folks here will be better able to answer them. Good luck.

Need some help with an applet

I looked on the site here, read all the topics on it, and tried them all.
but I can't get an applet to run on apex.
I tried <applet> and <object> I get the same thing. the applet just does not work. I created the applet on jdeveloper and moved the .jar file into the static files area.
I put the applet on apex.oracle.com at : http://apex.oracle.com/pls/apex/f?p=43533:1
user id is guest, password is apex1234
perhaps someone can look at this page and source code and tell me what I have done wrong? or maybe explain how to use the java console that pops up for details ?
the applet works fine in jdeveloper.
any help would be great..

Looks like your code is trying to access http://apex.oracle.com/pls/apex/MyPack/MyCalc/class.class, whereas your applet is a workspace file (retrieved via wwv_flow_file_mgr.get_file). So essentially, code="..." and archive="..." arent following the same path conventions.
<applet name="MyCalc"
code="MyPack/MyCalc.class"
archive="wwv_flow_file_mgr.get_file?p_security_group_id=6032196320393432956&p_flow_id=43533&p_fname=MyCalc.jar"
width="350"
height="350">
My applet works fine, and is located in XDB (I use EPG and it pretty much limits my file location options) in an open area, similar to /i/... (where Apex images, css etc are located), and so my code and archive locations are consistent.
The applet could be hosted at any URL - it doesnt have to be in Apex.

HELP with reloading applet AFTER it displays image

Hi people
I got a webpage that loads an applet which constantly needs to be refreshed in order for the applet to display a newer version of an image file (not very efficient I know). The image file is being constantly updated and so I need a way of refreshing the applet only AFTER it has been completely been loaded and is displaying the image?
I thought that
for(;;)
Thread.sleep(3000);
getAppletContext().showDocument(url);
}might do it but all it seems to do is refresh the page before anything is displayed
Any ideas?

If I put this problem in another way then it might help you KIND bunch to help me out.
My remote desktop application has only 1 little problem left. It displays the 1st image using the method below:
public void scrn()
try
    fileSize = dis.readInt();
    fileInBuffer = new byte[fileSize];
    dis.readFully(fileInBuffer, 0, fileSize-1);
    //Create an image from the byte array
    img = Toolkit.getDefaultToolkit().createImage(fileInBuffer);
    //Create a Canvas object and add the canvas to the applet
    canvas = new IRDPCanvas(img, this);
    canvas.addMouseListener(this);
    canvas.addKeyListener(this);
    add(canvas);
catch (Exception ioe)
}where dis = dataInputStream
IRDPCanvas has the following method
public void paint(Graphics g)
System.out.println("in paint");
if(image != null)
    if(tracker.checkAll(true))
      if(tracker.isErrorAny())
        System.out.println("Can't load image");
      cont.validate();
g.drawImage(image, 0, 0, this);
}where Container = cont
My problem is that applet displays the first image and then stops. If I rrefresh the page then the applet would display the next image and stop. This means that I have to constantly hit refresh in order for it to display the next image after the current one. Is there a better way of doing this?
I really need help here. PLEASE HELP.

Help with Java Applet Design

Hi,
I'm a uni student and I've had some programming experience in Java, although sadly a bit lacking in the area of Java Applets.
Recently I've being involved in a project where some tests are ran a number of times and a Data Aquisition System is used to transfer the number of cycles the test have currently done onto the computer, in a .csv file.
What I would like to do is to make this count available in a web browser LIVE.
I've come up with an idea, which is to write a Java Applet to read this file and output the correct count value in a textbox or what ever, however I am having a bit of difficulty making this update live.
Should I have some sort of script inside the webpage source that re-
runs the applet at regular intervals? If then how would that be possible?
Or should I have the applet re-read the file at regular intervals and repaint it-self? If then there will be problems with timers and possible execution threads (which I don't quite understand yet)?
One thing I want to be careful of is that this file to be read is updated by the DAQ system at random times, so whatever solution is implemented, I wouldn't want the file to be corrupted (e.g. if the file is read and written at the same time).
Thanks for any help

Read data from file at regular specified intervals,
display data in an applet.
U can use java.util.Timer and TimerTask and schedule the task.
for applets to read file, you may have have to sign the applet.
public class ReadApplet{
private Timer timer;
private TimerTask tt;
private JTextField tf;
public void init(){
tf=new JTextField(15);
timer=new Timer();
tt = new TimerTask(){
public void run(){
try{
BufferedReader fr=new BufferedReader(new FileReader(datafile));
String data = br.readLine();
int num = Integer.parseInt( data);
tf.setText("" + num);
}catch(Exception e) {}
timer.schedule( tt, 0, interval);
- create a jar file containing the class file
- generate a key using keytool -genkey
- sign the applet jar with jarsigner -signedjar using your key
-include applet code in html file
<applet code="Yourapplet.class" ARCHIVE="your signed jar" width="" height=""></applet>
It should work

Help with compiling applet

I'm new to java and have a pronlem.
I've downloaded an open-source piece of code in a jar file - filedrop - which exists in the namespace net.iharder.dnd* and my own code exists in the namespace sm.aaron.fileupload*, and requires the code from filedrop. I'd like to be able to compile an applet with the dependencies intact - however, I keep getting classdefnotfound exceptions on compile. I've included the jar file for filedrop in my classpath - what am I doing wrong? If I break the jar file out into classes and try to compile, it generates classdefnotfound for each class in filedrop as well. Basically I'm trying to build an applet that uploads files from a drag and drop operation.

Source is available at http://www.silicongraffiti.com/src.zip
I'm trying to use javac --classpath ./filedrop.jar ./pathtosrc/ to create the applet... the weird thing is, this works in netbeans, but I have no idea how to make it work outside of netbeans. And netbeans doesn't have a decent way to set up an applet embedded in an html page, and even if it did I can't move the files from netbeans or they cease to function. Gr.

Help with running applet

Hi all,
I have wrote this simple code which takes the input from two textboxes and then when the button is pressed, it adds the contents of the two boxes and displays them in the third textfield.
import java.awt.*;
import java.applet.*;
import java.awt.event.*;
public class Exercise extends Applet implements ActionListener
     private TextField inputA;
     private TextField inputB;
     private TextField output;
     private Button but1;
     public void init()
          inputA = new TextField(8);
          inputB = new TextField(8);
          but1 = new Button("Press To Add Values");
          add(but1);
          add(inputA);
          add(inputB);
          add(output);
          but1.addActionListener(this);
     public void actionPerformed(ActionEvent ae)
          int contentsOfA = Integer.parseInt(inputA.getText());
          int contentsOfB = Integer.parseInt(inputB.getText());
          int sum;
          if (ae.getSource()==but1)
               sum = (contentsOfA + contentsOfB);
               output.setText(Integer.toString(sum));
}It compiles fine, but it wont execute when i try run it.
Also does anyone know where i can download the Microsoft Java VM?
Thanks for your help
Michael

It compiles fine, but it wont execute when i try run
it.What happens, then? Did you run it in appletviewer or your browser? Did you get an error message? If you run it in your browser, you should open the Java Console to view error messages.
It looks like you never initialize the output Textfield so I think you are getting a NullPointerException.

Help with an applet

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