Applet in an html invoking other classes

I have an applet in an HTML page, invoking a another class, it doesn't work, do we have to include the classes as a jar, & reference it inside the HTML?

A JAR file could be referenced in an html with the ARCHIVE attribute of the <APPLET> tag.
<APPLET CODE="AppletSubclass.class" ARCHIVE="file1, file2"
WIDTH=anInt HEIGHT=anInt>
</APPLET>

Similar Messages

How to run an applet(in a html file) in the server?

I am using the jpedal Viewer inmy code, I embedded the applet code
in a html file , it is running fine, but when I try to run the same Viewer applet in the Server it is throwing an error
"java.lang.NoClassDefFoundError: org/jpedal/objects/acroforms/DefaultAcroRenderer
     at org.jpedal.PdfDecoder.startup(Unknown Source)
     at org.jpedal.PdfDecoder.<init>(Unknown Source)
     at pdfViewer.PdfApplet.init(PdfApplet.java:199)
     at sun.applet.AppletPanel.run(Unknown Source)
     at java.lang.Thread.run(Unknown Source)"
What is the problem ?
Please suggest solution for it?
Its urgent

I am trying to run the Applet in Tomcat server,
Could you post the code where you invoke the Applet? It sounds like you're saying you're trying to run the Applet as part of your server-side code. The other interpretation is that you are simply accessing the Applet through the browser that happens to be on the machine being used as the server.
Like I say, post the code that shows how you're trying to use the Applet "on the server".

How to show applets in a html file ?

Hi all
I have created an applet with jdev ,and I also generated the corresponding html file and a main method. So the java file runs standalone when I click on the run button , but when I copied the class file and the html file in a web server, then there is nothing in the applet region ! Can anyone help me ?
Here are the code :
Code of the java file :
// Copyright (c) 2001
package pack_applet;
import javax.swing.*;
import java.awt.*;
import java.awt.event.*;
* Applet
* <P>
* @author xxxx
public class Capplet extends JApplet {
boolean isStandalone = false;
String x;
String y;
JLabel label = new JLabel();
* Constructs a new instance.
* getParameter
* @param key
* @param def
* @return java.lang.String
public String getParameter(String key, String def) {
if (isStandalone) {
return System.getProperty(key, def);
if (getParameter(key) != null) {
return getParameter(key);
return def;
public Capplet() {
* Initializes the state of this instance.
* init
public void init() {
x = this.getParameter("x", "0");
y = this.getParameter("y", "1");
try {
jbInit();
catch (Exception e) {
e.printStackTrace();
private void jbInit() throws Exception {
this.setSize(new Dimension(400, 400));
this.getContentPane().add(label, BorderLayout.CENTER);
label.setText("x = "+x+" y = "+y);
* start
public void start() {
* stop
public void stop() {
* destroy
public void destroy() {
* getAppletInfo
* @return java.lang.String
public String getAppletInfo() {
return "Applet Information";
* getParameterInfo
* @return java.lang.String[][]
public String[][] getParameterInfo() {
String[][] pinfo =
{"x", "String", ""},
{"y", "String", ""},
return pinfo;
* main
* @param args
public static void main(String[] args) {
Capplet applet = new Capplet();
applet.isStandalone = true;
JFrame frame = new JFrame();
frame.setTitle("Applet Frame");
frame.getContentPane().add(applet, BorderLayout.CENTER);
applet.init();
applet.start();
frame.setSize(400, 420);
Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2);
frame.setVisible(true);
frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } });
static {
try {
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
catch(Exception e) {
e.printStackTrace();
And code of the html file :
<HTML>
<HEAD>
<META HTTP-EQUIV="Content-Type" CONTENT="text/html; charset=windows-1252">
<HTML>
<TITLE>
HTML Applet Test Page
</TITLE>
</HEAD>
<BODY>
<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<COMMENT><SCRIPT LANGUAGE="JavaScript1.1"></SCRIPT></COMMENT>
pack_applet.Capplet will appear below in a Java enabled browser.<BR>
<SCRIPT LANGUAGE="JavaScript"></SCRIPT>
<APPLET CODE = "pack_applet.Capplet" CODEBASE = "Capplet.class" WIDTH = 400 HEIGHT = 400 ALIGN = middle NAME = "TestApplet" >
</XMP>
<PARAM NAME = CODE VALUE = "pack_applet.Capplet" >
<PARAM NAME = CODEBASE VALUE = "Capplet.class" >
<PARAM NAME = NAME VALUE = "TestApplet" >
<PARAM NAME = "type" VALUE = "application/x-java-applet;version=1.2">
<PARAM NAME = "x" VALUE = "0">
<PARAM NAME = "y" VALUE = "1">
</APPLET>
</NOEMBED></EMBED></OBJECT>
</BODY>
</HTML>
Thank you very much.

you can load your pdf into your browser using
navigateToURL(new URLRequest("yourpdf.pdf"));

Java Applet in a HTML page: failing with PLS-00306: wrong number of args

We are trying to use a Java Applet in a HTML page. as our system needs to be able to retrieve a predefined set of data from a third party system that uses Dynamic Data Exchange Protocol (DDE) and are encountering errors from APEX and in IE itself.
We are using JavaDde from www.nevaobject.com that enables our Java applet to interact with Windows applications (Third Party System) using DDE.
This functionality is currently used in our Web Form 6i application and we are trying to use the same in the new ApEx application.
We are using ApEx version : 2.1 and actually aer encountering 2 problems:
Problem 1: ApEx failing with PLS-00306: wrong number or types of arguments in call to 'ACCEPT'
Problem 2: IE crashes if Applet used in a complex page with several regions (1 Context, 4 Report Regions, 2 level Tabs, Links)
This problem does not occur in the page where there is only applet and one region. In the case of complex page the IE crashes if the page is reloaded
Test scenario:
1- Create a simple page with the HTML region.
2- Define the Source of the above region as follows
<OBJECT CLASSID="clsid:8AD9C840-044E-11D1-B3E9-00805F499D93"
CODEBASE="http://java.sun.com/products/plugin/autodl/jinstall-1_4-windows-i586.cab#version=1,4,0,0"
WIDTH="1"
HEIGHT="1"
ID="simpleApplet"
NAME="simpleApplet">
<PARAM NAME="code" VALUE="simpleApplet.class" >
<PARAM NAME="archive" VALUE="simpleApplet.jar" />
<PARAM NAME="type" VALUE="application/x-java-applet;version=1.4">
</OBJECT>
3- Create a simple Java applet "simpleApplet" - for the test its enough if the applet will have just the init method printing out the mesage to the console
4- Create a Submit Button (not redirect) in Region Header and create unconditional (do not set When Button Pressed property) Page Branch to navigate to another page (the page without the applet)
6- Run the page and Submit -
The error below is returned by the engine:
In our case our applet is called ddeApplet - I do not know why is ApEx passing the Applet's ID down to the wwv_flow.accept method as a parameter
Tue, 24 Jul 2007 08:15:39 GMT
ORA-06550: line 7, column 2:
PLS-00306: wrong number or types of arguments in call to 'ACCEPT'
ORA-06550: line 7, column 2:
PL/SQL: Statement ignored
DAD name: rbdev2_ax
PROCEDURE : wwv_flow.accept
URL : http://castor:7778/pls/rbdev2_ax/wwv_flow.accept
PARAMETERS :
============
P_FLOW_ID:
147
P_FLOW_STEP_ID:
500
P_INSTANCE:
6986070096861669560
P_PAGE_SUBMISSION_ID:
1005758
P_REQUEST:
CRASH
P_ARG_NAMES:
100380029717786501
P_T01:
147
P_T02:
101
P_T03:
5000044
P_T04:
1
P_T05:
S
DDEAPPLET:
Ddeapplet[panel0,0,0,1x1,layout=java.awt.BorderLayout,rootPane=javax.swing.JRootPane[,0,0,1x1,layout=javax.swing.JRootPane$RootLayout,alignmentX=null,alignmentY=null,border=,flags=385,maximumSize=,minimumSize=,preferredSize=],rootPaneCheckingEnabled=true]
P_MD5_CHECKSUM:
ENVIRONMENT:
============
PLSQL_GATEWAY=WebDb
GATEWAY_IVERSION=2
SERVER_SOFTWARE=Oracle HTTP Server Powered by Apache/1.3.19 (Unix) mod_fastcgi/2.2.10 mod_perl/1.25 mod_oprocmgr/1.0
GATEWAY_INTERFACE=CGI/1.1
SERVER_PORT=7778
SERVER_NAME=castor
REQUEST_METHOD=POST
QUERY_STRING=
PATH_INFO=/pls/rbdev2_ax/wwv_flow.accept
SCRIPT_NAME=/pls
REMOTE_HOST=
REMOTE_ADDR=192.168.66.169
SERVER_PROTOCOL=HTTP/1.1
REQUEST_PROTOCOL=HTTP
REMOTE_USER=
HTTP_CONTENT_LENGTH=661
HTTP_CONTENT_TYPE=application/x-www-form-urlencoded
HTTP_USER_AGENT=Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.0)
HTTP_HOST=castor:7778
HTTP_ACCEPT=image/gif, image/x-xbitmap, image/jpeg, image/pjpeg, application/vnd.ms-powerpoint, application/vnd.ms-excel, application/msword, application/x-shockwave-flash, */*
HTTP_ACCEPT_ENCODING=gzip, deflate
HTTP_ACCEPT_LANGUAGE=en-us
HTTP_ACCEPT_CHARSET=
HTTP_COOKIE=ISCOOKIE=true; LOGIN_USERNAME_COOKIE=rdanko; ORACLE_PLATFORM_REMEMBER_UN=RDANKO:ngrb; WWV_FLOW_USER2=70FBB00945FE46B9; V6_AUTHENTICATION_COOKIE=70FBB00945FE46B9
Authorization=
HTTP_IF_MODIFIED_SINCE=
HTTP_REFERER=http://castor:7778/pls/rbdev2_ax/f?p=147:500:6986070096861669560:::::
HTTP_SOAPACTION=

"theArrow",
It looks like whatever HTML you're including on your page is creating HTML input form elements inside the HTML form "wwv_flow". This form is posted to wwv_flow.accept, and of course, the PL/SQL procedure wwv_flow.accept doesn't know anything these additional arguments/form elements you're attempting to POST.
Joel

Resize applet within a HTML frame

Hi,
I am using an applet to display a tree in a HTML frame of a web page.
I would like to resize or refresh the applet when the HTML frame is resized. Is there a way for the applet to know when the HTML frame is resized?
Any help will be appreciated.
Thanks

I tried using the componentResized() method to solve this problem but I was unsuccessful.
Here is what I tried:
My application consists of using a Java applet to display a tree in a HTML frame. In addition I put the tree in a scroll pane. I tried using addComponentListener(this) to get the componentResized() method to be involked. I tried adding the component listener to the scroll pane:
JScrollPane treeView = new JScrollPane(tree);
treeView.addComponentListener(this);
I tried adding the component listener to the root pane:
JRootPane root = getRootPane();
root.addComponentListener(this);
and I tried adding the comoponent listener to the glass pane and the content pane.
The componentResized() method was involked when the tree was initially displayed in some of my attempts but I was never able to get the componentResized() method to be involked when I resized the html frame.
I believe that I am having a problem determining which component to add the addComponentListener to so that the componentResized() method get invoked when I resize the html frame.

Applet in JSP/HTML

hi:
i have a myWebApp deployed in Tomcat\webapps, which contains:
myWebApp
- home.html
- WEB-INF
--- classes
------ applet1.class
what are the code should be in home.html to load applet1 ?
i tried:
<APPLET CODE="applet1.class" codebase="\WEB-INF\classes" WIDTH=200 HEIGHT=200></APPLET>
but not work.
please help. thank you in advance.

I always put my class or jar file in the same directory as the html file where codebase="." works just fine. Why don't you try:
<APPLET CODE="applet1.class" codebase="./WEB-INF/classes/" WIDTH=200 HEIGHT=200></APPLET>
or
<APPLET CODE="applet1.class" codebase="./WEB-INF/classes/." WIDTH=200 HEIGHT=200></APPLET>
V.V.

Can I invoke a class that extends JAppl from another class extends JAppl

Can I invoke a class that extends JApplet from another class that extends JApplet. I need to invoke an applet then select an action which opens another applet. Thanks in advance.

Nobody is able to solve this problem, i cant even
think this things. i have hope so plz try and get
result and help.Did you understand what Sharad has said???
Yep, you can forward to specific error page from servlet when even error occured in JSP. In order to achieve you have to open jsp file from servlet say example by using reqdisp.forward.
handle exception in the part where you are forwarding. And forward to the specific error page inside catch block.

Applet accidentally requests Java Core API classes from network

Hi,
starting an applet from a customers client machine (IE7, Windows XP, Standard JRE Installation of Java 1.6.0_26), I see in the tomcat access log entries signalizing that core java api classes are accidentally requested from the server:
"GET /mywebapp/applet/java/lang/StringBuilder.class HTTP/1.1" 404 1156 0
"GET /mywebapp/applet/javax/swing/JPanel.class HTTP/1.1" 404 1141 0
"GET /mywebapp/applet/java/net/JarURLConnection.class HTTP/1.1" 404 1162 0
"GET /mywebapp/applet/java/util/jar/JarEntry.class HTTP/1.1" 404 1153 0
"GET /mywebapp/applet/java/util/jar/JarFile.class HTTP/1.1" 404 1150 0
Although tomcat responses with HTTP 404, the applet works fine.
Questions:
1. For me, it looks like a security risk when the browser tries to load system classes from the network instead of using the local files from the jre dir, doesn't it?
2. When starting the applet from my local machine (different network), no tomcat logfile entries are generated. An interesting fact is, that in the customer network, the applet "codebase" parameter in the HTML source gets modifed by a proxy server for whatever reason like the following:
<applet codebase="http://mydomain.org/mywebapp/applet">
becomes some kind of:
<applet codebase="http://mydomain.org/mywebapp/applet/+sgrkjkrlgjklJKLjekrr4jewlkfjkerlkrelkjgregkjerlkgljkeglkjgjelkLKJLKefjei55435ijjkl=+">
It seems that such codebases confuse the classloader. Any ideas about that?
Thank you so much for any hints!

<applet codebase="http://mydomain.org/mywebapp/applet">
So you're loading individual .class files from the codebase? Don't do that, put them into a JAR and specify the JAR file(s) as the codebase. Much more efficient and it may solve this problem too.

Calling a variable from main class to other class

How do I call a variable that is initialize in the Test.java into Sub.java?
I want to call the a, b, c that I have initialize in Test.java into Sub.java.
import java.util.*;
import java.lang.*;
import java.awt.*;
public class Test{
     public static void main(String args[]){
          int b;
          int c=1;
          int a=11;
          b = c + a;
          System.out.println(+b);
import java.util.*;
import java.lang.*;
import java.awt.*;
public class Sub{
     public void Subtraction(){
          if(a>c)
               b = a-c;
          else if(c>a)
               b = c-a;
          else if(a=c)
               b = a-c;
          System.out.println(+b);
}

This is, and I'm sorry but I don't know how else to say this, a real big mess.
I'll go through some (most/all) of it but honestly....
import java.awt.*;Many will tell you that you should use specific imports and not wildcards to increase ease of reading. I am not so personally picky about this but it would help you.
import java.awt.event.*;
import javax.swing.*;
import java.util.*; Don't import things you never use. It just adds confusion get rid of java.util import
import java.lang.Object.*;Redundant. Remove it.
import java.applet.Applet.*;Unused. get rid of it
public class SUBOK {      Terrible class name. Please use the standard [_Java naming conventions_|http://java.sun.com/docs/codeconv/html/CodeConventions.doc8.html]
public int a = 10;
    public static void main(String[] args) {
         SUBOK runGUI = new SUBOK();
    public SUBOK(){
         JFrame f = new JFrame("Subok");
         f.setSize(150,100);
         f.setVisible(true);
         f.setDefaultCloseOperation(f.EXIT_ON_CLOSE);
         JButton b = new JButton("Sum");
         b.setActionCommand("send");
         b.addActionListener(new Push());
         JPanel p = new JPanel();
         p.add(b);
         f.add(p);
    } Most of that is okay although not great. But I don't think you should be doing anything in Swing at all yet.
private class Push implements ActionListener{
         public void actionPerformed(ActionEvent e){
              if(e.getActionCommand().equals("send")){
                   int a = 12;You are aware that this a has nothing to do with your other a? right? I mean this is a method local variable in a whole other class then the other one.
                       Add i = new Add();
                       i.Add();
    public int aValue(){
         return a;
} Alrighty then...
import java.lang.*;Redundant. Remove You never need to import java.lang.
import java.awt.*;Unused. remove.
import java.util.*;Unused remove.
public class Add {
     SUBOK a = new SUBOK();
     int d = a.aValue(); Aiaiaiai.
public void Add() {
         int b;
         int c = 0;
         b = d+c;
         System.out.println(b);
}First of all do not name a method the same as a class. Second most of this class appears to be based mainly in the realm of wishful thinking. In programming, wishing that something will "just work" without understanding the basics of why and how it works does, pretty much 100% of the time, not end well.
You need to take a number of steps back from this code, get grounded in some fundamentals and then make another attempt. I would highly recommend putting the Swing (or any other GUI) code aside for some time now. Inter-object communication is a fundamental part of OO and thus a fundamental part of Java and this code clearly shows that you don't understand it yet at all.
Start here [_Learning The Java Language_|http://java.sun.com/docs/books/tutorial/java/index.html]
If you have questions as you go through the tutorial do come back and ask them and someone here will be glad to help you. But in order to help you with code you have to be at a point where you understand things like variable scope, the difference between a class and an Object and how, why and what methods can be used to exchange information between two instances.

JavaFX applet in plain HTML?

Can anyone describe how I can embed JavaFX application as an applet in plain HTML, without JavaScript? The SDK-generated _browser.jnlp file has an error that the main class cannot be loaded, so I am looking for a work-around.

In this context, I also encountered some problems, causing me the loose of time.
I'm creating detailed documentations of my experiences with whole JFX platform 1.0, (will be hopefully soon delivered to Sun). It also records regarding deployment-methods, which can be shared with you, if you are interested in.
Based on my experience, the problem you mentioned is of high priority. (to be solved soon)
We know, how and how much easy-to-use and well-performing Deployment Methods are important for the success of all the Works, being done by organizations or individuals for Java FX Technology.
Exactly here we must also have permanently an open eye on that Segment related to integrating the Java FX platform with IDEs ......
Asghar
Java FX encourages. It is NOT a Just-Another-Try !

Failed to invoke startup class "MyStartup Class"

Hi,
I configured StartUpClass.java in Weblogic server through Admin Console . Also I set the required jar files in the classpath of the server in WL_HOME\server\bin\startWLS.cmd.
This StartUPClass is written to initialize and create the minimum number of objects in the pool, needed for URLConnection using ObjectPooling API.
I am getting Exceptions while starting the server after deployment of the application. I am pasting the full stack trace.
<Feb 1, 2007 9:49:55 AM IST> <Info> <WebLogicServer> <BEA-000377> <Starting WebLogic Server with Java HotSpot(TM) Client VM Version 1.4.2_12-b03 from Sun Microsystems Inc.>
<Feb 1, 2007 9:50:10 AM IST> <Info> <Configuration Management> <BEA-150016> <This server is being started as the administration server.>
<Feb 1, 2007 9:50:10 AM IST> <Info> <Management> <BEA-141107> <Version: WebLogic Server 8.1 SP4 Mon Nov 29 16:21:29 PST 2004 471647
WebLogic XMLX Module 8.1 SP4 Mon Nov 29 16:21:29 PST 2004 471647 >
<Feb 1, 2007 9:50:11 AM IST> <Notice> <Management> <BEA-140005> <Loading domain configuration from configuration repository at D:\bea\user_projects\domains\nessdomain\.\config.xml.>
<Feb 1, 2007 9:50:15 AM IST> <Notice> <Log Management> <BEA-170019> <The server log file D:\bea\user_projects\domains\nessdomain\myserver\myserver.log is opened. All server side log events will be written to this file.>
<Feb 1, 2007 9:50:18 AM IST> <Notice> <Security> <BEA-090082> <Security initializing using security realm myrealm.>
<Feb 1, 2007 9:50:18 AM IST> <Notice> <WebLogicServer> <BEA-000327> <Starting WebLogic Admin Server "myserver" for domain "nessdomain">
<Feb 1, 2007 9:50:31 AM IST> <Warning> <HTTP> <BEA-101248> <[Application: 'D:\MSM\Workspace\MSM2.0Jan9', Module: 'MSM31']: Deployment descriptor "web.xml" is malformed. Check against the DTD: org.xml.sax.SAXParseException: The content of element type "web-app" must match "(icon?,display-name?,description?,distributable?,context-param*,filter*,filter-mapping*,listener*,servlet*,servlet-mapping*,session-config?,mime-mapping*,welcome-file-list?,error-page*,taglib*,resource-env-ref*,resource-ref*,security-constraint*,login-config?,security-role*,env-entry*,ejb-ref*,ejb-local-ref*)". (line 96, column 11).>
<Feb 1, 2007 9:50:31 AM IST> <Warning> <HTTP> <BEA-101248> <[Application: 'D:\MSM\Workspace\MSM2.0Jan9', Module: 'MSM31']: Deployment descriptor "weblogic.xml" is malformed. Check against the DTD: org.xml.sax.SAXParseException: The content of element type "weblogic-web-app" must match "(description?,weblogic-version?,security-role-assignment*,run-as-role-assignment*,reference-descriptor?,session-descriptor?,jsp-descriptor?,auth-filter?,container-descriptor?,charset-params?,virtual-directory-mapping*,url-match-map?,preprocessor*,preprocessor-mapping*,security-permission?,context-root?,wl-dispatch-policy?,servlet-descriptor*,init-as*,destroy-as*)". (line 23, column 20).>
<Feb 1, 2007 9:50:35 AM IST> <Critical> <WebLogicServer> <BEA-000286> <Failed to invoke startup class "MyStartup Class", java.lang.ClassNotFoundException: com.helio.msm.ws.util.StartUpClass
java.lang.ClassNotFoundException: com.helio.msm.ws.util.StartUpClass
     at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
     at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:274)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
     at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
     at java.lang.Class.forName0(Native Method)
     at java.lang.Class.forName(Class.java:141)
     at weblogic.t3.srvr.StartupClassService.invokeClass(StartupClassService.java:156)
     at weblogic.t3.srvr.StartupClassService.access$000(StartupClassService.java:36)
     at weblogic.t3.srvr.StartupClassService$1.run(StartupClassService.java:121)
     at weblogic.security.acl.internal.AuthenticatedSubject.doAs(AuthenticatedSubject.java:321)
     at weblogic.security.service.SecurityManager.runAs(SecurityManager.java:121)
     at weblogic.t3.srvr.StartupClassService.invokeStartupClass(StartupClassService.java:116)
     at weblogic.t3.srvr.PostDeploymentStartupService.resume(PostDeploymentStartupService.java:63)
     at weblogic.t3.srvr.SubsystemManager.resume(SubsystemManager.java:131)
     at weblogic.t3.srvr.T3Srvr.resume(T3Srvr.java:966)
     at weblogic.t3.srvr.T3Srvr.run(T3Srvr.java:361)
     at weblogic.Server.main(Server.java:32)
>
<Feb 1, 2007 9:50:36 AM IST> <Error> <Socket> <BEA-000438> <Unable to load performance pack. Using Java I/O instead. Please ensure that wlntio.dll is in: 'D:\j2sdk1.4.2_12\bin;.;C:\WINDOWS\system32;C:\WINDOWS;D:\j2sdk1.4.2_12\bin;c:\windows\system32;C:\apache-ant-1.6.5\bin;'
>
<Feb 1, 2007 9:50:36 AM IST> <Notice> <WebLogicServer> <BEA-000331> <Started WebLogic Admin Server "myserver" for domain "nessdomain" running in Development Mode>
<Feb 1, 2007 9:50:36 AM IST> <Notice> <WebLogicServer> <BEA-000360> <Server started in RUNNING mode>
<Feb 1, 2007 9:50:36 AM IST> <Notice> <WebLogicServer> <BEA-000355> <Thread "ListenThread.Default" listening on port 7001, ip address *.*>
<Feb 1, 2007 9:50:55 AM IST> <Warning> <Socket> <BEA-000402> <There are: 5 active sockets, but the maximum number of socket reader threads allowed by the configuration is: 4. You may want to alter your configuration.>
Please help me in resolving this problem. I need it asap
Thanks,
Dharani

I should be more specific and have a bit more to add....
We have our app in an .ear file. I find that when I put the startup
classes in a seperate directory which is in the classpath specified in the
startWeblogic.cmd file they will be run on startup. I don't think I should
have to do this since these files exist in the ear file. I think this is
causing other problems too such as an illegalAccessError I get when an EJB
tries to load a class which was previously accessed by the startup classes.
Thanks,
Steve
Steve Snodgrass wrote:
Hi,
I am beggining to upgrade our app from Weblogic 5.1 to 6.0. So far it
has been progressing nicely and everything works with one exception. I
can not get the start up classes to run. I get the following exception:
<Failed to invoke startup class "MyStartup Class",
java.lang.ClassNotFoundException:
followed by my fully qualified class name. The class is reference
elsewhere in the code and works fine. Is a seperate classpath used for
startup classes? If not why might Weblogic have a hard time finding my
class?
Thanks,
Steve

Flash Vars is not working when we accessing from other class files

Hi all, I'm currently developing a flex application where i
need to pass the data from the flash vars to the other class files
instead of the main actionscript class file.
Does any body know how i should go about doing that?? you can
see this below code : please help me out if u know how to solve
testnew2.as file
package {
import flash.display.Sprite;
import flash.display.LoaderInfo;
public dynamic class testnew2 extends Sprite {
public var
xmlfile:String=String(root.loaderInfo.parameters.lists);
public function testnew ():void{
package {
import flash.text.TextField;
import flash.display.Sprite;
import flash.display.LoaderInfo;
public dynamic class testnew extends testnew2 {
public function testnew () {
var myText:TextField = new TextField();
// this assumes that you are going to pass in an id variable
// on the end of the myFile.swf?id=12345 or
// use FlashVars in the HTML parameter list for instance
// 'FlashVars', 'id=123456', 'width', '1024',
myText.text = new testnew2().xmlfile;
addChild(myText);
but if we access in same file it is working fine:
package {
import flash.text.TextField;
import flash.display.Sprite;
import flash.display.LoaderInfo;
public dynamic class testnew extends Sprite {
public function testnew () {
var myText:TextField = new TextField();
myText.text = String(root.loaderInfo.parameters.lists);
addChild(myText);

Pass the data into the main app, then from there either pass
it into the sub-components or use
Application.application.parameters, or bind to the values.
Tracy

Calling repaint from other Class file.

Hi,
First of all i am pretty new to Java so I hope you understand what I am trying to explain..
I am trying to create an applet which draws some polygons on the screen. For the drawing of these polygons I have created another class which is located in another package but the same project. I plan to use this second package as some kind of library so that i can simple call 2 or 3 functions in future applets to draw these polygons (which always have the same shape). In the library file i have created a contructor, a draw function and some other functions to change some properties. I also created a function that created a popup window as soon as i click on one of the polygons i have created. In the popup some buttons are available which change the color of the polygon. All this works fine, but the problem i have is the following:
When i click a button the main class (in package 1) needs to be repainted for the changes to be visable. But the main class can always be a different one. Is it possible to check in the class in the library package, which class from the main package called the class, and execute a repaint() on that class. So i have the following situation:
Package 1 (Applets):
package applets;
class myApplet extends Applet implements .... {
private Tank tank1 = new Tank(20, 20, 100, 200);
private Tank tank2 = new Tank(250, 20, 100, 200);
public void paint(Graphics g) {
tank1.drawTank(g);
tank2.drawTank(g);
public void mouseClicked(MouseEvent e) {
tank1.openWindow();
tank2.openWindow();
Package 2 (Library):
package applets.library;
class Tank {
public Tank(int xPos, int yPos, int height, int width) {
public void drawTank(Graphics g) {
public void openWindow() {
new myWindow("Window1");
public class myWindow extends Frame {
public myWindow(String name) {
show();
public boolean action(Event e, Object arg) {
return true;
So what i want to do is: In class Tank in the public class myWindow in the method action, i want to call the repaint() of the class myApplet
I hope my problem is clear to you, as you may have noticed i have a little trouble explaining it clearly..

First of all thanks a lot for your reply and sorry for my way of programming. Like i said i am pretty new to Java, i am actually only programming for about 2 weeks and trying to learn from some examples on the internet.
I dont really understand what you want me to do, is it maybe possible to give a little bit of sample code? That would help me a lot.
Maybe some background information about the project will help a bit too.
I work at a company that develops automation solutions. We program PLC's and SCADA systems. Now Siemens has some PLC's that support Java applets which make it possible to visualize industrial processes. Now i am trying to figure out if it is possible to start developing own java applets for visualisation in the future. Since most programmers here have no experience in any higher programming language i want to keep it as simple as possible, by developing libraries that do the most of the programming work for them.
Now i want to create the first part of this library by programming some kind of storage tank. This tank always has a valve. when i click on the valve a popup should open with the operation button to open of close that valve. When a valve is opened it should be colored green and when its closed it should be colored gray or something. The Tank class has a couple of methods:
drawTank(); to draw the tank in my applet,
openValve(); to open the Valve,
closeValve(); to close the Valve,
After all this is created i want to be able to use this class in all my other classes and create a tank by simple making a new Tank object, draw it on my applet using the drawTank() method and open or close the Valve using the other 2 methods, however when i open or close the Valve the color of the valve should change so i must be able to call the repaint of all the classes that use my Tank class, but i want to do that INSIDE my Tank class.
If there is another way of doing this i would love to hear so, but i would help me a lot if you can explain in a little bit of sample code. It doesn't have to be really long or detailed.
Thnx in advance

JSP applet tag X Html applet tag (what is the difference?)

what is the advantage in using the JSP applet tag instead of a simple Html applet tag ?
second question:
I have an applet in a Html frame, and a menu on the left side.... When the user select the applet option at first time, everything runs ok.. after the user select another option and then select the applet again, it fails in some features .. Why ?

well, if by "the JSP applet tag", you mean the jsp:plugin tag.. that will just generate the same HTML tag you would write. The only advantage would be it should be less typing to use the taglib.
second answer:
without seeing any code, it'd be hard to figure out the problem. The obvious thing is you are setting some state of something that is preventing further action.

Invoked super class constructor means create an object of it?

Hei,
i have create one class that extends another class. when i am creating an object of sub class it invoked the constructor of the super class. thats okay.
but my question is :
constructor is invoked when class is intitiated means when we create an
object of sub class it automatically create an object of super class. so means every time it create super class object.

Hi,
   An object has the fields of its own class plus all fields of its parent class, grandparent class, all the way up to the root class Object. It's necessary to initialize all fields, therefore all constructors must be called! The Java compiler automatically inserts the necessary constructor calls in the process of constructor chaining, or you can do it explicitly.
   The Java compiler inserts a call to the parent constructor (super) if you don't have a constructor call as the first statement of you constructor.
Normally, you won't need to call the constructor for your parent class because it's automatically generated, but there are two cases where this is necessary.
   1. You want to call a parent constructor which has parameters (the automatically generated super constructor call has no parameters).
   2. There is no parameterless parent constructor because only constructors with parameters are defined in the parent class.
   I hope your query is resolved. If not please let me know.
Thanks & Regards,
Charan.

Applet in an html invoking other classes

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