Run applet from browser

I cannot run the applet from explorer ?! I'm trying to open the html (applet).

Perhaps, you use Swing library and your browser don't support JDK more than 1.1.
May be, your applet can not find additional classes.
Check it, and also applet tag in HTML page.

Similar Messages

HOw to run Applet in browser.

Hi guys. I've got 2 problems.
1. In Window, I've got Java installed (and using NetBean IDE as Java editor), so of course I've got j2sdk_nb-1.4.2 installed as well. But I couldn't run any applet in IE, for example, in games.yahoo.com, I couldn't join any game because applet always failed to load. But yesterday, I've got a pop up asking to install jre1.4.2 and after install this JRE, everything works fine. My point here is, when I have SDK1.4.2 which contains JRE, why should I have to install new JRE to run applets ?
2. Could anyone tell me how to run applet in Mozilla, Linux. I'm using Linux RedHat 9 as well. And in Redhat, I've got J2sdk_nb-1.4.2 installed with NetBeans IDE. It said that I need appropriate Plugs-in, but in my Java directory, I also found Plugsin directory. So how to configure Mozilla to run applet.
Thanks for reading.

Just to let you guys know that I sorted it out already. Well, the problem lies in I'm confused between two directory /usr/lib/Mozilla and /usr/lib/Mozilla and two Java plugs-in available in nsc60 and nsc60-gcc (don't remember exactly)
For my Linux (Red Hat 9), I've got to create symbol link from nsc60 directory to /usr/lib/Mozilla, not any other way.
Thanks

How to switch between jre 1.5.0 and 1.4.2 when running applet in browser?

Hi,
I have JRE 1.5.0_05 and 1.4.2_04 installed and currently applet in browser is always run under jre 1.5. How to run the applet under jre 1.4.2 in browser?
Thanks a lot

Hi,
Thanks for the info. I was thinking that the note didn't work for me, apparently I didn't use the conventional APPLET tag.
Is there other way to switch JRE if I'm not using APPLET tag?

Problems with running applet from Java Tutorial

Hello
I'd like to compile applet from Lesson Applets, trail: Deployment, title of lesson: A Simple Network Client Applet. But at the beginning of the source code is written that it will work only with: JavaSE 5 version.
* SwingWorker can be downloaded at:
* https://swingworker.dev.java.net/
* SwingWorker must be downloaded for JavaSE 5, but will be included
* in JavaSE 6.
Well, does anyone know about applet doing the same thing which would work in older versions of JDK?. Do I necessarily have to install JavaSE6?. I have J2EE 1.4SDK and I run into errors compiling this example.
Cheers
Message was edited by:
macmacmac

I've got another applet which was written for version 1.1 of Java. It compiles but when I run it, instead of letters of quote I get rectangles, positioned one next to the other. So I can't read the quote. What's wrong with this applet?. Here's the code of it:
* 1.1 version.
import java.applet.Applet;
import java.awt.*;
import java.awt.event.*;
import java.io.*;
import java.net.*;
import java.util.*;
public class QuoteClientApplet3 extends Applet
implements ActionListener {
boolean DEBUG = false;
InetAddress address;
TextField portField;
Label display;
DatagramSocket socket;
public void init() {
//Initialize networking stuff.
String host = getCodeBase().getHost();
try {
address = InetAddress.getByName(host);
} catch (UnknownHostException e) {
System.out.println("Couldn't get Internet address: Unknown host");
// What should we do?
try {
socket = new DatagramSocket();
} catch (IOException e) {
System.out.println("Couldn't create new DatagramSocket");
return;
//Set up the UI.
GridBagLayout gridBag = new GridBagLayout();
GridBagConstraints c = new GridBagConstraints();
setLayout(gridBag);
Label l1 = new Label("Quote of the Moment:", Label.CENTER);
c.anchor = GridBagConstraints.SOUTH;
c.gridwidth = GridBagConstraints.REMAINDER;
gridBag.setConstraints(l1, c);
add(l1);
display = new Label("(no quote received yet)", Label.CENTER);
c.anchor = GridBagConstraints.NORTH;
c.weightx = 1.0;
c.fill = GridBagConstraints.HORIZONTAL;
gridBag.setConstraints(display, c);
add(display);
Label l2 = new Label("Enter the port (on host " + host
+ ") to send the request to:",
Label.RIGHT);
c.anchor = GridBagConstraints.SOUTH;
c.gridwidth = 1;
c.weightx = 0.0;
c.weighty = 1.0;
c.fill = GridBagConstraints.NONE;
gridBag.setConstraints(l2, c);
add(l2);
portField = new TextField(6);
gridBag.setConstraints(portField, c);
add(portField);
Button button = new Button("Send");
gridBag.setConstraints(button, c);
add(button);
portField.addActionListener(this);
button.addActionListener(this);
public Insets getInsets() {
return new Insets(4,4,5,5);
public void paint(Graphics g) {
Dimension d = getSize();
Color bg = getBackground();
g.setColor(bg);
g.draw3DRect(0, 0, d.width - 1, d.height - 1, true);
g.draw3DRect(3, 3, d.width - 7, d.height - 7, false);
void doIt(int port) {
DatagramPacket packet;
byte[] sendBuf = new byte[256];
packet = new DatagramPacket(sendBuf, 256, address, port);
try { // send request
if (DEBUG) {
System.out.println("Applet about to send packet to address "
+ address + " at port " + port);
socket.send(packet);
if (DEBUG) {
System.out.println("Applet sent packet.");
} catch (IOException e) {
System.out.println("Applet socket.send failed:");
e.printStackTrace();
return;
packet = new DatagramPacket(sendBuf, 256);
try { // get response
if (DEBUG) {
System.out.println("Applet about to call socket.receive().");
socket.receive(packet);
if (DEBUG) {
System.out.println("Applet returned from socket.receive().");
} catch (IOException e) {
System.out.println("Applet socket.receive failed:");
e.printStackTrace();
return;
String received = new String(packet.getData());
if (DEBUG) {
System.out.println("Quote of the Moment: " + received);
display.setText(received);
public void actionPerformed(ActionEvent event) {
int port;
try {
port = Integer.parseInt(portField.getText());
doIt(port);
} catch (NumberFormatException e) {
//No integer entered. Should warn the user.
}

Error when trying to run UCM from browser -The portal page for your Content

Hi
When I try and run the UCM in a browser using "http://localhost/idc", it showing
"The portal page for your Content Server needs to be rebuilt. Start the WebLayout Editor as a standalone application and select Update Portal... from the Options menu."
I did see a previous message that says to go to Weblayout Editor Applet - Options - Build Home Page - Update -Ok, but I was not able to see the Build Home Page option in the drop down.
Any ideas what may be causing this issue?
Thanks in advance for your help
Cheers
Sylvia

Hi Srinath
Thanks for your reply.
Commenting out the following lines still does not fix my problem.
<div align=center>Welcome to UCM10g for SIF DEV</div> 
 <$if IsLoggedIn$>UserName = <$UserName$> <$endif$>
 <$if IsDynamic$>Current Time = <$dateCurrent()$>
 <$else$>This is a static page.
 <$endif$>
I have installed this product on two environments following the same kind format.
In our dev environment I am able to type in the following to get to the Welcome to Content Server Page
http://devenv/idc/
In the other environment I use the following and I get that the error "The portal page for your Content Server needs to be rebuilt. Start the WebLayout Editor as a standalone application and select Update Portal... from the Options menu."
http://testenv/idc
So the only way to get to the Content Server Page is to type the full path as below which I don't want to do, because I want the welcome screen to appear first.
https://testenv/idc/idcplg?IdcService=GET_DOC_PAGE&Action=GetTemplatePage&Page=HOME_PAGE&Auth=Internet
Is there a way I can configure the application to get to my welcome screen instead of getting the error message detailed above?
Thanks
Sylvia

Run applet in browser when html file is stored in different dir.

I have a SiteSelector.class stored in: "D:\DATA\Java Programmes\Networking\"
and a SiteSelector.html stored in :"D:\DATA\Java Programmes\Networking\HTML files\"
Here is a part of the code of SiteSelector.html:
<applet code= "SiteSelector.class"
width=500
height=500
codebase="D:\\DATA\\Java Programmes\\Networking\\"
archive=""
alt="Your browser understands the <APPLET> tag but isn't running the applet, for some reason."
>
<param name = "title0" value = "Java Home Page">
 <param name = "location0" value = "http://java.sun.com/">
<param name = "title1" value = "Deitel">
 <param name = "location1" value = "http://www.deitel.com/">
 <param name = "title2" value = "JGuru">
<param name = "location2" value = "http://www.jGuru.com/">
<param name = "title3" value = "JavaWorld">
<param name = "location3" value = "http://www.javaworld.com/">
Your browser is ignoring the <APPLET> tag!
</applet>
Since html file and .class file are stored in different directories so in applet tag I specify absolute url in "codebase = ......" to indicate that the browser should look for .class file in "D:\DATA\Java Programmes\Networking\".
But when I run the Applet in the browser, nothing happens. But when I copy the html file back to "D:\DATA\Java Programmes\Networking\" and change the codebase = "D:\\...." to codebase = "." It works well. Any one can help me to hanld this problem. I want to run the applet in the browser when the html file is stored in different directory. Thank you.
Message was edited by:
beckham12a18
Message was edited by:
beckham12a18
Message was edited by:
beckham12a18
Message was edited by:
beckham12a18

anyone please help me!!!!

Running Applet on Browser

plz tell me how to run an applet on the browser.
i have the applet.java file and also created the applet.class file .
i have the applet.html file and all the 3 files are in the same folder .
how to display the applet contents on the browser now.
i tried with
appletviewer applet.htmlbut this throws
java.lang.NoClassDefFoundError:

Just add this to your HTML code:
<applet code="codename.class"></applet>.
Put the name of your applet instead of "codename.class".
You can also add height and width attributes to the applet, and you can also put text inside the applet, so if the person does not have java, he or she will see the message.
i.e.:
<applet code="codename.class" height="100" width="100">Not loading? You might need to download java.</applet>

Running Applet without Browser

Hello All,
I've developed a test applet which contains a button.
When i click the button a Frame opens and does whatever i try to do,
Thus,to Run my applet i type the URL in the Browser and click the button to open the Frame.
My Problem is the Frame is destroyed as soon as the browser is closed!
I need the frame to be browser independent.
Could anybody suggest me how this would be possible?
Thank you!

Applets are intended to be run in browsers.
There is a program included with the JDK that can run an applet - look for the appletviewer program. There are insructions on its use in the Java tools documentation.
It sounds like you should be running a Java application, not an applet.

ClassNotFound error while running applet from Web application

hi everyone,
I have a web application deployed in Tomcat web server. I have HTML file at the level of WEB-INF. And all class files under WEB-INF/classes. But while ruuning the application it giving following error.
load: class com.app.AppletTest not found.
java.lang.ClassNotFoundException: com.app.AppletTest
 at sun.applet.AppletClassLoader.findClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at sun.applet.AppletClassLoader.loadClass(Unknown Source)
 at java.lang.ClassLoader.loadClass(Unknown Source)
 at sun.applet.AppletClassLoader.loadCode(Unknown Source)
 at sun.applet.AppletPanel.createApplet(Unknown Source)
 at sun.plugin.AppletViewer.createApplet(Unknown Source)
 at sun.applet.AppletPanel.runLoader(Unknown Source)
 at sun.applet.AppletPanel.run(Unknown Source)
 at java.lang.Thread.run(Unknown Source)
Caused by: java.io.IOException: open HTTP connection failed.
 at sun.applet.AppletClassLoader.getBytes(Unknown Source)
 at sun.applet.AppletClassLoader.access$100(Unknown Source)
 at sun.applet.AppletClassLoader$1.run(Unknown Source)
 at java.security.AccessController.doPrivileged(Native Method)
 ... 10 more
Here the HTML file applettest.html
<html>
 <head>
 <title>Multiple Image Upload</title>
 </head>
 <body>
 <applet code="com.app.AppletTest" width="300" height="300">
 </applet>
 </body>
</html>
And Java applet file is
package com.app;
import java.applet.Applet;
import java.awt.Color;
import java.awt.Graphics;
public class AppletTest extends Applet
 public void init()
 System.out.println("Init called");
 this.setBackground(new Color(180,200,250));
 public void start()
 System.out.println("Start called");
 public void paint(Graphics g)
 g.drawString("welcome Hello World",50,50);
 System.out.println("Paint called");
 public void stop()
 System.out.println("Stop called");
 public void destroy()
 System.out.println("Destroy called");
Thanks.

Hi,
if u put ur com.app.AppletTest file @ WEB-INF Directry, then this problem will solve easily.
you have to put applet package(com.app.AppletTest) @ WEB-INF Directry. Since
Applet is using by html, u have to keep applet with html file.
if applet class have interaction with other classes, u have to seperate all related class to applet to seperate package and put them @ WEB-INF folder.

CS3 - run swf from browser

I have a swf that uses actionscript 3.0 to drag and drop images, activate buttons that run movie clips and manage the display list. It runs flawlessly when I execute it directly (i.e. double-click the swf), but I want to publish it on the web -- so I used File -> Publish to create the necessary html file, but when I run it in a browser (I've only tried IE) the initial screen looks perfect, but none of the buttons and drag and drop features work. Also, when I run the swf using File -> Publish Preview, it fails exactly the same way if I choose HTML, but works perfectly if I choose Flash.
I created a pared-down version of the fla (see the code below) to try to isolate the problem, and the behavior is exacly the same. I'm attaching the swf and html files for the pared-down version.
Any ideas?
Thanks
----- actionscript 3.0 code -----
import flash.display.StageDisplayState;
import flash.display.Scene;
import flash.display.MovieClip;
stage.displayState = StageDisplayState.FULL_SCREEN;
// for displaying scenario text
var myTextMovie:MovieClip;
var myHideTextMovie:MovieClip;
showtext14_btn.addEventListener(MouseEvent.MOUSE_DOWN, showText);
function showText(evt:MouseEvent):void {
   myTextMovie = new Myclass14();
   addChild(myTextMovie);
   myTextMovie.x = 530;
   myTextMovie.y = 240;

http://www.caleuche.com/Special/FlashDevelopment/WebTest2.swf
http://www.caleuche.com/Special/FlashDevelopment/WebTest2.html
This button is supposed to run a movie clip that displays a text box. One other bit of information that I've uncovered since my last post is that a co-worker can't get the swf to work under any circumstances. She tried double-clicking it directly (it's on a network folder that she has access to) and also running it using a flash player called Swiff Player. In both cases the button is displayed, but clicking it does nothing (except display the rollover states). The only difference I can think of is that I have Flash CS3 Professional installed on my computer and she doesn't. Might it be some sort of permissions problem or something I have set wrong in the Publish Settings?
Thanks for your interest and help.

NoClassDefFound when running applet from a jar

I have a project defined in Oracle JDeveloper 3.2 which runs fine with the appletviewer. However, when I create
a JAR of the project (including all the libraries), Netscape gives me this error.
java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleConnection
at java.lang.ClassLoader.resolveClass(Compiled Code)
at java.lang.ClassLoader.loadClassInternal(Compiled Code)
at oracle.jdbc.driver.OracleDriver.getConnectionInstance(Compiled Code)
at oracle.jdbc.driver.OracleDriver.connect(Compiled Code)
at java.sql.DriverManager.getConnection(Compiled Code)
at java.sql.DriverManager.getConnection(Compiled Code)
at Silly.myApplet.dbConnection(Compiled Code)
at Silly.myApplet.doSqlQuery(Compiled Code)
at Silly.myApplet.jbInit(Compiled Code)
at Silly.myApplet.init(Compiled Code)
* at netscape.applet.DerivedAppletFrame$InitAppletEvent.dispatch(Compiled Code)
at java.awt.EventDispatchThread$EventPump.dispatchEvents(Compiled Code)
at java.awt.EventDispatchThread.run(Compiled Code)
at netscape.applet.DerivedAppletFrame$AppletEventDispatchThread.run(Compiled Code)
The class oracle/jdbc/driver/OracleConnection is in the JAR, as are the two called classes it claims not to find in these errors:
# Verifier error oracle/jdbc/dbaccess/DBError.throwBatchUpdateException(Ljava/lang/String;Ljava/lang/String;II[I)V: Cannot find class java/sql/BatchUpdateException# Verifier error oracle/jdbc/driver/OracleConnection.initialize(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;Loracle/jdbc/dbaccess/DBAccess;Ljava/util/Hashtable;)V: Cannot find class java/util/Map
I would appreciate any help.
TIA.

java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleConnectionI can think of a handful of reasons why you are getting that error message. But, let's see your html file, just that portion that deal with the <APPLET>, <OBJECT> and <EMBED> tags. I'm particularly interested in how you specify the jar file(s). Are you doing it this way:
<APPLET CODE="myApp" CODEBASE="." ARCHIVE="myApp.jar,Oracle.jar" WIDTH=100 HEIGHT=100></APPLET>
I am assuming that oracle libraries are in a jar file, are you putting that jar file inside of your jar file -- that would never work. If that's what you did, you must either extract the contents of libraries jar and then jar them together with your class files or keep the jar separate and use a manifest to specify the CLASSPATH.
V.V.

Applet not running in local browser

I can run any applet from web.
I can run any applet in appletviewer.
But I can not run applets in browser from local html file.
I can not run even the demos that came with de SDK 1.4.1_01.
Can anyone give me some hint?
Maybe is very obvious but I ca not see it.
Thank you very much.
Valeriu Sprintu

the hello.java file is:
import java.applet.Applet;
import java.awt.Graphics;
public class hello extends Applet {
StringBuffer buffer;
 public void init() {
 public void start() {
 public void stop() {
 public void destroy() {
 public void paint(Graphics g) {
 //Draw a Rectangle around the applet's display area.
 g.drawRect(0, 0, size().width - 1, size().height - 1);
 //Draw the current string inside the rectangle.
 g.drawString("Hello", 5, 15);
The hello.html file is:
<html>
<body>
Applet should be there
 
<applet code="hello.class" width=200 height=200>
No applet
</applet>
</body>
</html>
hello.html and hello.class are of course in the same folder.
If I modify the .html file acording to OBJECT tag specifications for Java Plug-In the same applet runs OK in the browser (IE5.0 ).
I forgot to tell that I have installed the last version of SDK j2sdk1.4.1_01
<html>
<body>
Applet should be there
 
<OBJECT classid="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
WIDTH = 200 HEIGHT = 200 >
<PARAM NAME = CODE VALUE = "hello.class" >
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.1">
No applet
</OBJECT>
</body>
</html>
I think there is a problem with the JVM from Microsoft
Thank you,
Best regards,
ValeriuS

Applet within browser not releasing file resource

hi,
I have an applet for ftp images upload.
run from eclipse IDE (which uses applet viewer) the applet is ok.
if i run my applet from browser here is what happens:
i upload a file .& leave the browser opened.
i then open this same file with gimp or photo-shop & get file in use error.
if i close browser & try opening file .it works ok.
why the file isn't released when applet instance still on browser ?
is there a fix to this issue ?
thanks for helping .

thanks for prompt reply.
yes i close all streams...
the core method i use to upload files is below (client is a FTPClient object)
private synchronized void putFile(File file, String remoteFile)
               throws FileUploadException {
          String sFile = null;
          try {
               sFile = r.chomp(remoteFile, '/');
               client.put(file.getAbsolutePath(), sFile + file.getName());
               r.numBytes += file.length();
          } catch (Exception e) {
               //e.printStackTrace();
               try {
                    retry(file, sFile);
               } catch (Exception e1) {
                    throw new FileUploadException(e1.getMessage());
     }what am i doing wrong ?

Problem to run forms from URL

Hello all:
I need help to solve this problem, I great URL to run forms from browser , then I teak the URL and go to another machine. When I run the URL the browser closed and gives message to send report to Microsoft or not. I tray this again and the browser closed again and give the same message.
I teak the URL and make it as link to call forms java code ,then before the forms started the browser closed again and give the same message.
So please can anyone help me in this.
Thanks for anticipation.

hello Gerd Volberg :
thanks for replying, i use database and forms 10g Release 2 .the application server is oracle application server 10g Release 2 (10.1.2).
the url is
http://localhost:8889/forms/frmservlet?config=spewin&userid=hr/hr@orcl&form=E:\final_form\test.fmx&otherparams=USID=10070+COMID=5554442075
thanks

Is it possible to run a website built in Java and applet from Safari browser in iPad

Is it possible to run a website built in Java and applet from Safari browser in iPad?

Java isn't supported on the iPad

Run applet from browser

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