Applet that run on a webbrowser like netscape

can you please construct for me an applet that run on a webbrowser like Netscape and show me how to construct an HTML for it

http://java.sun.com/docs/books/tutorial/getStarted/cupojava/index.html tells you how to do it, in beginner language.

Similar Messages

Do Applets that runs in multiple IE use the different JVM?

I found that it seems that applets that runs in multiple IE or multiple Firefox instance/process
share the same JVM instance on Windows.
Is it the same on Linux and other platforms?
Or it is just a bug relative to this one?
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6587166
Thanks.

1. For IE, I enabled java console.
2. Start one instance of IE with an applet page. Got a console.
3. Start second instance of IE (double click on it, not New Window!) with an applet page. Got a second console.
This tells me that the 2 instances do not share the VM.

How to write a program that runs on a port like a deamon or service?

hi,
how to write a program in java that runs on a port like a deamon or service, accepts requests from client, process the request and gives responce.
for ex. tomcat runs on 8080 port as deamon or service.
is it socket programming? if yes please give me a simple program which runs on a specific port.
ex. a program running on a port talking two integers and return the total.
thanks and regards,
moses.

I suggest you read
[http://java.sun.com/docs/books/tutorial/networking/sockets/clientServer.html]
For more
[http://www.google.co.uk/search?q=serversocket+tutorial]

AppletViewer won't run an applet that runs in Internet Explorer?? Whats up?

I have an applet that I created. It runs in Internet Explorer perfectly. I mean perfectly, every single time, without a problem.
But, if I try to run appletviewer with this applet, it gives all kinds of exception messages: Ever seen this before?
Thanks!

Why not just paste the applet code. I know it is simple, but here it is. I am new to java so you may see some weird code for sure.... It is suppose to countdown to a given date/time... Just something simple to help me learn Java.
If anyone else has time and wants to compile it and try to get it to run as an Active Desktop Item that would be super cool
Thanks!!!!
Here is the html page code:
<HTML>
<HEAD>
<TITLE>Countdown Applet</TITLE>
</HEAD>
<BODY>
<APPLET CODE="PKVTimer.class" HEIGHT=30, WIDTH=120>
     <param name=BackColorRed value="0">
     <param name=BackColorGreen value="128">
     <param name=BackColorBlue value="0">
     <param name=ForeColorRed value="255">
     <param name=ForeColorGreen value="255">
     <param name=ForeColorBlue value="255">
     <param name=Year value="2003">
     <param name=Month value="9">
     <param name=Day value="27">
     <param name=Hour value="6">
     <param name=Minute value="30">
</APPLET>
</BODY>
</HTML>
Here is the code:
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.util.*;
class TimeInMillis extends GregorianCalendar {
     public long getMillisForDate(Calendar calIn) {
          getInstance();
          setTime(calIn.getTime());
          long now = getTimeInMillis();
          return now;
public class PKVTimer extends Applet implements Runnable
     private Thread thThread;
     private Label tfCountdown;
     private Panel P1;
     private Calendar clCalendar, clHuntCalendar;
     private String sDays, sTime, sHrs, sMins, sSecs;
     private int iYear, iMonth, iDay, iHour, iMinute;
     public void init()
          String cRed = getParameter("BackColorRed");
          String cGreen = getParameter("BackColorGreen");
          String cBlue = getParameter("BackColorBlue");
          String cfRed = getParameter("ForeColorRed");
          String cfGreen = getParameter("ForeColorGreen");
          String cfBlue = getParameter("ForeColorBlue");
          iYear = Integer.parseInt(getParameter("Year"));
          iMonth = Integer.parseInt(getParameter("Month"));
          iDay = Integer.parseInt(getParameter("Day"));
          iHour = Integer.parseInt(getParameter("Hour"));
          iMinute = Integer.parseInt(getParameter("Minute"));
          Color background = new Color(Integer.parseInt(cRed),
                              Integer.parseInt(cGreen),
                              Integer.parseInt(cBlue));
          Color foreground = new Color(Integer.parseInt(cfRed),
                              Integer.parseInt(cfGreen),
                              Integer.parseInt(cfBlue));
          // Set the applet background color to match the label background
          setBackground(background);
          tfCountdown = new Label("asdfasdfasdfasdfasdf");
          tfCountdown.setBackground(background);
          tfCountdown.setForeground(foreground);
          tfCountdown.setFont(new Font("Arial",Font.PLAIN,10));
          P1 = new Panel();
          P1.setLayout(new FlowLayout(FlowLayout.LEFT,0,2));
          P1.add(tfCountdown);
          add("North",P1);
          tfCountdown.setBounds(10,10,300,30);
          clHuntCalendar = Calendar.getInstance();
clHuntCalendar.set(iYear,iMonth-1,iDay,iHour,iMinute,0);
          sTime = new String();
          thThread = new Thread(this);
          thThread.start();
     public void run()
          while(true)
               clCalendar = Calendar.getInstance();
               TimeInMillis gcTM = new TimeInMillis();
               long lMilliHunt = gcTM.getMillisForDate(clHuntCalendar);
               long lMilliNow = gcTM.getMillisForDate(clCalendar);
               if (lMilliNow >= lMilliHunt) {
                    tfCountdown.setText("Go Bust One!!!");
                    this.stop();
                    return;
               long elapsedTime = lMilliHunt - lMilliNow;
               long lTemp, lDays, lHrs, lMins, lSecs;
               lTemp = elapsedTime/(60*60*1000L);
               lHrs = lTemp;
               lDays = lHrs / 24;
               lHrs = lTemp - (lDays * 24);
               if (clCalendar.get(clCalendar.SECOND) >= clHuntCalendar.get(clHuntCalendar.SECOND)) {
                    lSecs = 60 - (clCalendar.get(clCalendar.SECOND) - clHuntCalendar.get(clHuntCalendar.SECOND));
                    clCalendar.set(clCalendar.MINUTE,clCalendar.get(clCalendar.MINUTE)+1);
               else {
                    lSecs = (clHuntCalendar.get(clHuntCalendar.SECOND) - clCalendar.get(clCalendar.SECOND));
               if (lSecs == 60) {
                    lSecs = 0;
               if (clCalendar.get(clCalendar.MINUTE) >= clHuntCalendar.get(clHuntCalendar.MINUTE)) {
                    lMins = 60 - (clCalendar.get(clCalendar.MINUTE) - clHuntCalendar.get(clHuntCalendar.MINUTE));
               else {
                    lMins = (clHuntCalendar.get(clHuntCalendar.MINUTE) - clCalendar.get(clCalendar.MINUTE));
               if (lMins == 60) {
                    lMins = 0;
               sDays = String.valueOf(lDays) + " Days ";
               if (lHrs < 10) {sHrs = "0" + String.valueOf(lHrs);} else {sHrs = String.valueOf(lHrs);}
               if (lMins < 10) {sMins = "0" + String.valueOf(lMins);} else {sMins = String.valueOf(lMins);}
               if (lSecs < 10) {sSecs = "0" + String.valueOf(lSecs);} else {sSecs = String.valueOf(lSecs);}
               sTime = sDays + sHrs + ":" + sMins + ":" + sSecs;
               tfCountdown.setText(sTime);
               try {
                    thThread.sleep(1000);
               } catch (InterruptedException e) {}
     public void stop()
          thThread = null;

Does anyone have an applet that runs on Windows CE and connects via jdbc to lite DB

I am trying to get an applet to connect to the Oracle lite DB
I use
     if (conn == null)
     // Load the JDBC driver
Class.forName("oracle.lite.poljdbc.POLJDBCDriver");
     conn = DriverManager.getConnection ("jdbc:polite:polite", "SYSTEM", "MANAGER");
     output.appendText ("Connected\n");
but CE just echos oracle.lite.poljdbc.POLJDBCDriver and does not connect.
Does anyone have any working samples? I am using Jeode JVM on the CE device

We have the same problem with that platform, but we get a
java.security.AccessControlException: access denied (java.lang.RuntimePermission loadLibrary.oljdbc40)
exception.
Thank you in advance.

Applet doesnt run in netscape

I have made an applet that runs under the applet viewer.
In netscape the button, labels, and textfields show,
but the button doesn't produce the remainder of the run,
as evidenced by no painting, like it does in the other situations.
It also runs as an application on a frame.
Where do I look for problems?
These are all of my imports:
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.Label;
import java.awt.Frame;
import java.applet.Applet;
import java.awt.Toolkit;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.awt.Button;
import java.awt.FlowLayout;
import java.awt.Font;
import java.awt.event.ActionListener;
import java.awt.event.ActionEvent;
import java.awt.Graphics;
dewayne

My Applet is really kind of neat and on one applet panel,
and I want to share it on the browser in the classroom.
My Applets used to work with Netscape on my computer.
Thinking that I probably lost a plugin,
I read as much as I could about plugins.
But I am really lost.
It seems unfortunate that one
has to know so much about things
peripherally to what one is trying to do.
It makes programming much harder
than it used to be a few years ago.
Can someone help me with some suggestions?
Or does the lack of responses mean that others don't know?
Or are they snubbing me? I give up.
dewayne

Using an Applet to run another application

To anyone that can help.
Simply, can I have an applet that runs an PC application?
More detail:
I am relatively new to the Java Development environment, but so far have put together a reasonable intranet web application that takes user input and writes to an Oracle database. From this information, I have then invoked Microsoft Word and populated a template with information to create a document.
All fine and good, but I am running everything under W2000 so I have server and client all in the one place. I am using Tomcat 4 as my server, the application is written using JSP and my own Beans.
The principle of how the Word link works is: within the JSP information is written to a Bean, which creates a file and then executes a WordAPI using:
cmd = "WordAPI.exe";
try {
Runtime.getRuntime().exec(cmd);
This is OK with everything on one machine, but I now need to set it up on a server and this will not invoke Word on the client. I thought that if I turned the bean into an applet then it would run at the client end and that would resolve the problem, but it doesn't work. Am I breaking some rules or trying to do the impossible?
Thanks for any help

I think it boils down to a matter of security. An applet generally runs in what is known as a sandbox. Since you're talking about an intranet and you didn't say anything about Netscape browser, I'll assume that you're only interested in IE. In IE, you can start by testing to see if your application will work if you click:
Tools-->Internet Options-->Security-->Trusted sites-->sites
and add the intranet URL to make it a trusted site.
If that doesn't work, you may have to sign the applet and put it in a .cab file. To do this you'll need to use the cabarc command (if you can't find the command on your system, search www.microsoft.com web site for a download). After having signed the applet, you still have to make sure that the client's IE security settings are just right for what you needed to do. For this, you'll have to look at:
Tools-->Internet Options-->Security-->Local intranet-->Custom Levels...
Good Luck!
V.V.

I have a program that runs in Java Console. I need to run multiple copies of the program. I can't do this with tabs. Can I do it with separate windows/processes

The program in question was implemented as a Java applet that runs in a browser. The developer says it must run under the Java Console and that I cannot run more than one copy of it in a given browser technology (e.g., Firefox); but I can run multiple copies if I use, eg, Firefox for one, IE 32 bit for another, Chrome for a 3rd and IE 64 bit for a 4th. I have tested this, and this does work.
Why would it not be the case if I spawned a completely different Firefox instance/process? When asked this question, the developer said, no, you have to run a different browser implementation to get a distinct Java Console for each one.
Does this make sense in general, or, more importantly, is it true for Firefox?
Thanks,
Dennis

It is working for me if I open a second Firefox instance with its own profile by starting Firefox with the -no-remote command line switch.
* http://kb.mozillazine.org/Creating_a_new_Firefox_profile_on_Windows
* http://kb.mozillazine.org/Shortcut_to_a_specific_profile
* http://kb.mozillazine.org/Using_multiple_profiles_-_Firefox
* http://kb.mozillazine.org/Bypassing_the_Profile_Manager
Use the -no-remote command line switch to open another Firefox instance with its own profile and to run different Firefox instances simultaneously.
* http://kb.mozillazine.org/Opening_a_new_instance_of_Firefox_with_another_profile

Run applet that uses borland jar's

Hi!!!!!!!!
I use JBuilder as IDE and i developed an applet that uses XYLayout. The problem i'm having is that the browser (MS Internet Explorer and Netscape) throw the same error and that is the package i used.
How could i configure it???
P.S. : sorry for my english!!!!!!!!!!
Bye

I'm writing this message again because i wasn't clear enough. I use a jar provided by Borland JBuilder:
" com.borland.jbcl.layout.*; "
This library isn't provided by Sun, so the when i try to run the applet from a browser, it throws an error.
The question is: how can i "tell" the browser to "look-up" the Borland's library i use?
Bye

I want to purchase a powerbook that will run a music program like MOTU or Pro Tools as well as run Final Cut Pro without being sluggish...any help?

I want to purchase a powerbook that will run a music program like MOTU or Pro Tools as well as run Final Cut Pro without being sluggish...any help?

The only way that would work out is if you ran exactly the versions that were made for old PowerBooks. Anything newer may require Intel and not run, or will strain the poor old G4 CPU.
Your needs have to be modest, too, because the problem with older music and video software is that they are not current as far as formats and codecs for the Web. If you want to output H.264, the current standard for YouTube/Flash video, older software may not support it, and in addition, H.264 is processor-intensive and is tailor-made for today's multi-core, 2+ GHz processors. It will overwhelm a G4. A PowerBook G4 can barely play YouTube videos.
More perspective: The PowerBooks worked great for miniDV format editing. In other words, 480i SD/standard definition video in use from the late 1990s to the late 2000s. If that is all you want to do, edit tape from an old miniDV camera to SD output, then OK.
But if you want to edit today's HD video, whether 720p from a snapshot camera/iPhone 4 or 1080p from a DSLR, the PowerBook and the software for it will either not recognize AVCHD/H.264, or it will slow the PowerBook to a dead crawl.
I'm in agreement with the above: Intel Macs have been out for so many years that getting a used one is a much better deal than a dead-end PowerBook. And I loved (still love) my PowerBooks.

Debug an applet that has a run-time (logic) error how?

hi,
I have an applet that has a non-terminating loop in it...I found it after eye-balling my code.
How would one debug an applet? I have bought sooooo many books on java, & NONE provide/identify a process for debugging applets. I use JTextPad & would appreciate a method i can use to debug applets....ppppllleezzzz

TheStijn is correct about stepping thru code - you'd need a development environment. However, the better of these for use in a commercial environment are usually expensive (>$1000). The free ones are not so good (although given that WSAD is based on Eclipse and I think WSAD is pretty good, maybe you could go for Eclipse). They also take some time to get to grips with.
You could instead litter your code with System.out.println() statements to see what it is doing. These can be viewed from the browser's Java console. On IE, you enable the console by doing Tools > Internet Options > Advanced. Scroll down to "Microsoft VM" and select "Java Console enabled". Then the console is visible (after re-starting IE) from the View menu (at the bottom).
With Netscape (4.7), you do Communicator > Tools > Java Console. You can also view it on other browsers thru similar mechanisms. Hope this helps in the short-term.

I have a G4 with 10.4.11 and would like to upgrade to 10.5. I am using MYM software that runs in 9, Will 10.5 support 9?

I have a G4 MacMini with 10.4.11 and would like to upgrade to 10.5. I am using MYM software that runs in 9, Will 9 run in 10.5?

How often are you using MYM in 9? You could install 10.4 on a partition or external and bootup to do your MYM work. Run everything else in 10.5. This is how I transitioned my remaining 9 apps to newer apps for later OS X versions.

Any restriction on Mac that binaries running from root dirs like /usr/libexec/ cannot load dylib's at run-time?

Hi all,
Is there any restriction on Mac OS X 10.6/10.7 that binaries running from root directories like /usr/libexec/ cannot load dylib's at run-time using dlopen() or NSAddImage()?
I am trying to run a binary like "sample" from a directory inside /usr/libexec/ which tries to load a dylib like "sample.dylib" which is present in the same directory as "sample".
It resulted in a segmentation fault with the following error and stack-trace.
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000003430
0x0000000000003430 in ?? ()
Using gdb, I could find out that the program crashed inside dlopen() (the path passed to dlopen() being a simple filename like "sample.dylib").
The dlopen() at the top of the stack-trace pasted below gets called around 10 times; it does not crash during this 2nd level dlopen() any-time.
#0 0x00007fff81be9e93 in dlopen ()
#1 0x00007fff82838f7f in map_images_nolock ()
#2 0x00007fff82821bc0 in map_images ()
#3 0x00007fff5fc039b9 in __dyld__ZN4dyldL18notifyBatchPartialE17dyld_image_statesbPFPKcS0_jPK15dyld_imag e_infoE ()
#4 0x00007fff5fc0c839 in __dyld__ZN11ImageLoader4linkERKNS_11LinkContextEbbRKNS_10RPathChainE ()
#5 0x00007fff5fc04d48 in __dyld__ZN4dyld4linkEP11ImageLoaderbRKNS0_10RPathChainE ()
#6 0x00007fff5fc08f68 in __dyld_dlopen ()
#7 0x00007fff81be9ec0 in dlopen ()
#8 0x000000010002694f in AAA ()
#9 0x0000000100026730 in XXX ()
#10 0x0000000100026494 in YYY ()
#15 0x00000001000566a9 in main (argc=7, argv=0x7fff5fbff810) at ../../main.c:50
After this 2nd level dlopen() gets called 10-15 times, the stack will unwind from map_images_nolock () till __dyld_dlopen (). But when it tries to finish all the instructions inside __dyld_dlopen () and step out of it, the program crashes with the EXC_BAD_ACCESS signal.
Please find below the final stack-traces obtained during debugging when I put breakpoints for AAA() and dlopen() and went on stepping inside till the program crashed.
(gdb) bt
#0 0x00007fff5fc04d48 in __dyld__ZN4dyld4linkEP11ImageLoaderbRKNS0_10RPathChainE ()
#1 0x00007fff5fc08f68 in __dyld_dlopen ()
#2 0x00007fff81be9ec0 in dlopen ()
#3 0x000000010002694f in AAA ()
#4 0x0000000100026730 in XXX ()
#5 0x000000010002663c in YYY ()
#11 0x00000001000566a9 in main (argc=7, argv=0x7fff5fbff7f0) at main.c:50
(gdb) step
Single stepping until exit from function __dyld__ZN4dyld4linkEP11ImageLoaderbRKNS0_10RPathChainE,
which has no line number information.
0x00007fff5fc08f68 in __dyld_dlopen ()
(gdb) bt
#0 0x00007fff5fc08f68 in __dyld_dlopen ()
#1 0x00007fff81be9ec0 in dlopen ()
#2 0x000000010002694f in AAA ()
#3 0x0000000100026730 in XXX ()
#4 0x000000010002663c in YYY ()
#10 0x00000001000566a9 in main (argc=7, argv=0x7fff5fbff7f0) at ../../main.c:50
(gdb) step
Single stepping until exit from function __dyld_dlopen,
which has no line number information.
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x0000000000003430
0x0000000000003430 in ?? ()
To summarise:
For some reason, a user wants to install a product and its binaries under /usr/libexec/.
This binary tries to dynamically load a dylib using dlopen("sample.dylib", RTLD_LAZY | RTLD_LOCAL).
It looks like, the dynamic linker then opens dependent dylibs and runs module initialisers. Then crashes when returning (which sounds like a trashed stack).
Can anyone please tell me whether there is some OS-imposed restriction or OS bug which can explain this type of behaviour?
(Note: The crash does not occur if the binary and dylib are installed under a normal user's home directory and run from there.)
Many thanks,
Vinay

The otool output for the binary and dylib are pasted below.
localhost:Latest dev$ otool -L /usr/libexec/Dipu/sample/sample
/usr/libexec/Dipu/sample/sample:
/System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0, current version 275.0.0)
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 476.18.0)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0)
/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4)
localhost:Latest dev$ otool -L /usr/libexec/Dipu/sample/sample.dylib
/usr/libexec/Dipu/sample/sample.dylib:
libProduct.dylib (compatibility version 1.0.0, current version 1.0.0)
/System/Library/Frameworks/Carbon.framework/Versions/A/Carbon (compatibility version 2.0.0, current version 136.0.0)
/System/Library/Frameworks/IOKit.framework/Versions/A/IOKit (compatibility version 1.0.0, current version 275.0.0)
/usr/lib/libstdc++.6.dylib (compatibility version 7.0.0, current version 7.4.0)
/usr/lib/libgcc_s.1.dylib (compatibility version 1.0.0, current version 1.0.0)
/usr/lib/libSystem.B.dylib (compatibility version 1.0.0, current version 111.1.4)
/System/Library/Frameworks/CoreFoundation.framework/Versions/A/CoreFoundation (compatibility version 150.0.0, current version 476.18.0)

HT1688 when you double tap the home button to go back to your other apps are those apps always running and using cellular data even if I am not currently using them? I thought it froze them and didn't use data other that a select few apps like Facebook,

when you double tap the home button to go back to your other apps are those apps always running and using cellular data even if I am not currently using them? I thought it froze them and didn't use data other that a select few apps like Facebook, email, etc. Also I always select no when I download an app and it wants me to have those push notifications. Because that would mean that I would have to delete my apps after everytime I just them from that bar and that would be very annoying and just stupid. Or maybe apps do use data and it's just a big scheme to make everyone go over on their data plans.

This should help: http://speirs.org/blog/2012/1/2/misconceptions-about-ios-multitasking.html.

Am running FCP5, but upgraded to iMac a few months ago. Noted that some features of FCP5 like Boris text are no longer available. Was told by local Apple store that new operating system I now have (Snow Leopard) will drop some such elements. Is this true?

Am running FCP5, but upgraded to iMac a few months ago. Noted that some features of FCP5 like Boris text are no longer available. Was told by local Apple store that new operating system I now have (Snow Leopard) will drop some such elements. Is this true? Noted same thing in LIVE TEXT.
Mike T.

Am running FCP5, but upgraded to iMac a few months ago. Noted that some features of FCP5 like Boris text are no longer available. Was told by local Apple store that new operating system I now have (Snow Leopard) will drop some such elements. Is this true? Noted same thing in LIVE TEXT.
Mike T.

Applet that run on a webbrowser like netscape

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