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Article View: borland.public.jbuilder.java.swing
Article #8744

Re: about initializer

#8744
From: Rich Wilkman
Date: Wed, 26 Jul 2000 00:00
118 lines
4543 bytes
Randy:

I don't know.  Your trace doesn't look like what you get from the
Plugin.  Did you run your HTML throught the converter?

-Rich

Randy wrote:
> 
> i already have the plug-in's; I believe that the problem lies in this:
> package ImagePackage;
> 
> import java.awt.*;
> import java.net.*;
> 
> public class ImageCanvas extends Canvas {
>   public Image image;
> 
>   public ImageCanvas() {
>      super();
>   }
> 
>   public ImageCanvas(String imageName) {
>      this();
>      image = Toolkit.getDefaultToolkit().getImage(imageName);
> 
>      MediaTracker mt = new MediaTracker(this);
>      try {
>         mt.addImage(image,0);
>         mt.waitForID(0);
>      }
>      catch (InterruptedException ex) {
>         ex.printStackTrace();
>      }
>   }
> 
>   public void paint(Graphics g) {
>     g.drawImage(image,0,0,null);
>   }
> 
>   public Dimension getPreferredSize(){
>     return new Dimension(image.getWidth(null),image.getHeight(null));
>   }
> 
> }
> or there is another code that i am suspecting also.
> 
> Rich Wilkman <richw@formlessvoid.com> wrote in message
> news:397E6020.C8468A93@formlessvoid.com...
> > Randy:
> >
> > Okay, as I suspected you are trying to use JFC (Swing) in an Applet.  No
> > browser supports that out of the box (a topic that is covered over and
> > over and over again here in these newsgroups).  You can look at the
> > Plugin if you must use JFC in the Applet.
> >
> > -Rich
> >
> > Randy wrote:
> > >
> > > here's the whole trace:
> > >
> > > java.security.AccessControlException:access denied
> > > (java.lang.RuntimePermission modifyThreadGroup)
> > > at javax.swing.TimerQueue.sharedInstance(TimerQueue.java:66)
> > > at javax.swing.JApplet.<init>(Japplet.java:92)
> > > at DeckOfCards.<init>(DeckOfCards.java:8)
> > > at java.lang.Class.newInstance0(Native Method)
> > > at java.lang.Class.newInstance(Class.java:237)
> > > at sun.applet.AppletPanel.createApplet(AppletPanel.java:579)
> > > at sun.applet.AppletPanel.runLoader(AppletPanel.java:515)
> > > at sun.applet.AppletPanel.run(AppletPanel.java:293)
> > > at java.lang.Thread.run(Thread.java:484)
> > >
> > > Rich Wilkman <richw@formlessvoid.com> wrote in message
> > > news:397D15F6.247C5191@formlessvoid.com...
> > > > Randy:
> > > >
> > > > Offhand, I'd say it means you are trying to use JFC in your Applet.
> > > > It's never helpful to "edit" the trace.  Post the whole thing from top
> > > > to bottom.  Note, if you are using IE you have to have the Java
> console
> > > > up before accessing your Applet; otherwise you won't see your trace.
> > > >
> > > > -Rich
> > > >
> > > > Randy wrote:
> > > > >
> > > > > i am getting java.security.AccessException: access denied; what does
> > > that
> > > > > mean?
> > > > > Rich Wilkman <richw@formlessvoid.com> wrote in message
> > > > > news:397C5A44.D1834B94@formlessvoid.com...
> > > > > > Randy:
> > > > > >
> > > > > > No.  The "not initialized" message for Applets usually means you
> > > haven't
> > > > > > set things up correctly or deployed all the classes or are trying
> to
> > > use
> > > > > > JFC, etc.  Look in the Java Console for the real error message and
> > > work
> > > > > > from there.
> > > > > >
> > > > > > -Rich
> > > > > >
> > > > > > Randy wrote:
> > > > > > >
> > > > > > > do all classes that are created require a no argument
> initializer?
> > > I am
> > > > > > > getting that an applet isn't initialized and can't find the
> problem.
> > > > > > >
> > > > > > > why does an applet run properly in the appletviewer but gives
> > > "applet
> > > > > isn't
> > > > > > > initialized" when running it thru a browser?
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From: Rich Wilkman <richw@formlessvoid.com>
Subject: Re: about initializer
Date: 2000/07/26
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